Resize multiple images. How to resize multiple photos or pictures - FastStone Photo Resizer How to quickly resize multiple photos

Good day! If you have hundreds of megabytes in a small folder with photos? Or do pictures take more than 10 minutes to be sent by mail, even with decent Internet speed? Or is it like this, does it take half an hour to send an archive of photos to a flash drive? Welcome to the right place, in the article I will tell you in which program and how to reduce the size of a JPG file without losing quality.

Compressing an image is a simple science. You can reduce all the pictures in one folder en masse, at one time, this is called batch processing. Or process each image separately. Let's talk about these methods.

How to reduce Jpg file size - a little necessary theory

Regarding the JPG format (and its variant JPEG), there are 3 ways to resize files. The size of PNG, BMP, GIF and other graphic formats can be adjusted only by the first method.

Reducing the image resolution (number of pixels) without losing quality;
Reduced quality without reducing resolution;
Simultaneous reduction in both resolution and quality.

Any photograph is a collection of pixels. In modern cameras their number exceeds 2-4 thousand horizontally and vertically. This is a lot, and megabytes “grow” from such a resolution. Does this improve image quality? Almost none, especially for non-professional photographers during everyday shooting. Since changing the resolution of a photo can be almost painless for quality, many people use this method to make the image smaller.

I will definitely tell you about the most convenient methods in a note; all you have to do is choose the one that suits you.

By compressing the image by 2 times (by 50%, in terms of graphic editors), we will reduce its area (and volume!) by 4 times, school geometry in practice.

It is logical to reduce the number of dots in order to reduce the size of the photo - and not notice any changes in quality.

An alternative option for JPG files is to leave the image resolution at its original size, but allow the computer to reduce the quality. Some blurriness, smoothing, or fuzziness is acceptable. We can assume that the compression quality in graphic editors is something like this:

100% — there is no compression of the picture;
90% — the default setting in many programs is minimal compression;
80% — deeper degree: files are compressed quite strongly;
70% — still an acceptable loss of quality, but within reason;
50% and below– a radical reduction in the appearance of the pattern, noticeable to the naked eye.

How to compress an image: workshop in graphic editors

We will experiment with this “still life”: an ordinary telephone photo that does not pretend to be artistic, rather of the “terrible to show” class, but suitable for a family archive.

Technical details: JPG format, resolution 2560 by 1920 pixels, source file weight is unacceptable 2.44 MB. Before compressing a photo, we recommend copying it to a separate folder so as not to lose the image during the compression process.

Source file: 2.44 MB, with an extension of 2560x1920 pixels

Compressing an Image in Paint

It’s in vain that this standard graphic editor included with Windows is considered a frivolous tool. Firstly, it is very interesting and useful to teach “dummies” the basics of PC literacy, and secondly, it is available everywhere and always - and when a more powerful program for working with graphics is not installed on the computer, its capabilities will come in handy more than once.

Opening the source in Paint: the number of dots is amazing, but their number does not mean beauty or quality. Scale: 100%.

To open an image in Paint, you need to right-click on the file and select "Edit".

This editor doesn't allow you to manually adjust the JPG compression level, but it feels like it sets it to around 80%. It is enough to resave the file to get 1.83 MB instead of the original 2.44 MB. By eye, the level of quality remains almost the same.

The image was compressed to 1.83 MB after resaving in Paint in 2-3 clicks and 10 seconds.

Paint has a way to reduce the pixel size of an image. This is a button "Resize". When you click it, a dialog box appears asking you to enter new horizontal/vertical dimensions as a percentage of the original number of points.

Let's choose 50 to 50: 2 times less length and width means an area 4 times less. By the way, the resolution must be changed equally in both dimensions, otherwise the picture will be deformed.

Function “Change picture resolution” standard in most graphic editors, from primitive Paint to monstrous Photoshop.

The result is 616 kilobytes. Not enough for a family archive, but great for publishing on websites. Without a magnifying glass, the difference with the source is barely noticeable.

616 kilobytes with a resolution of 1290×960 px.

Note that 0.6 megabytes was obtained not only as a result of changing the resolution, but using a “combined” method - the image size in Paint is also adjusted by reducing the JPG quality by about 85%. It is impossible to change the value of the compress parameter in the desired direction. Paint does this automatically.

Reducing Image Size in Photoshop

This powerful editor can be used for the tasks described. But it’s like transporting a bag of groceries not in a car, but calling a Kamaz. Photoshop is an overly powerful application for something as simple as reducing the weight of a photo.

Opening this program and saving the file in it will take much more time than the compression itself. However, to make our instructions complete, we will also describe how to compress an image in Photoshop.

After opening the file in Photoshop, you should select the “Image” section, click on it to the “Image Size” item. As shown in the picture below.

A dialog box will open where you can manually set the height and width of the picture. OK button – save the file. The same dialog is called hotkeys “Ctrl+Alt+I”, quick saving of the result, keyboard shortcut – “Ctrl+S”.

Second way to reduce file size pictures or photos, this is to apply quality when saving. Whatever you think is suitable for you. Let me show you with an example how to do this.

A window should open with settings for saving the image in the desired quality and format. I will continue to torture my photo with the doggies. Let me remind you that the file size is exactly 2.44 MB, let's see what we can squeeze out of it.

Choose from above - 4 options. Look at the quality changes during compression, you can move the image by previewing it.

Please note that at the top left is the Source, then they come with compression.

If you look at the second option, the quality has not changed, and the weight of the image has decreased to 1.6 MB, when choosing quality 72. A completely suitable picture for storing or sending by mail.

You can also set the image size before saving. Which you need. And click save, select the recording path and you're done.

The best compression programs. Batch Processing

Paint is always at hand, but it’s too primitive. Photoshop is excessively bulky and clumsy. What programs are best to compress JPG? Good viewers are also image managers! Their advantage is support for batch compression: simultaneous processing of all or several selected files in any folder instead of manually changing pictures one by one.

ACDSee, XnView and IrfanView: just three of the many programs for compressing images en masse. Even the thoroughly commercial ABC has a free but fully functional version. If the program is not Russified, you should remember the word Compress - “Compression”. Let's look at batch compression technology using the XnView graphic browser as an example.

Having opened one of the files in the target folder, double-click on it. A filer window will open with previews of all images.

The XnView viewer and editor says that 9 files take up almost 20 MB. Disorder!

Viewers also have the “JPEG Compression” function without reducing resolution.

Image compression in online services

Although it is convenient and correct to have a program at hand to resize a graphic file, you can use numerous online services for this task.

The principle of operation is completely similar to the work of classic PC applications: either compression, or resizing, or both actions at once. All parameters are customizable.

The disadvantage of the online method is the need to send an initially large file: this process takes some time. Web services for compression are usually free, but you also need to download the result back to your PC.

The waste of time is justified if the number of files being reduced does not exceed several pieces per month. Any specific recommendations? Please, those online services that I use myself.

TinyJPG.com - Foreign service

Not a bad foreign service, without unnecessary settings. The service will do everything for you, just specify the location on your PC to download the pictures, after which the compression process will begin automatically.

I’ll warn you right away that the site has compression restrictions for unregistered users - 20 images with a maximum size of 5 MB.

Upon completion of the process, it is possible to download all files in one archive or one at a time, as is convenient for you.

IMGonline.com.ua - convenient and understandable

If you use this service, you can change the size of the image itself, as well as compress the file itself with the desired quality. I wrote about what quality is acceptable at the beginning of the article.

One of the free online services.

Both services allow you not only to play with sizes and quality, but also to edit pictures. There is a detailed help system. Which I advise you to read before using.

In other operating systems, including mobile ones, the principles and settings of compression technologies are the same.

Processing drawings in Mac OS

Let's look at the process of working with images on a Mac. For example, pictures can be perfectly compressed by the standard Preview application: there is no need to install additional software, even for batch processing. Preview on Mac knows how to resize several photos at once.

Select one or several images, open them in preview, then select Tools > Adjust Size, and fill in the required values. And save.

Conclusion

We recommend experimenting with image compression yourself, copying them to a test folder first so as not to lose important photos. After 3-4 attempts, you will understand in practice how to reduce the size of an image in an optimal way, with the most suitable compression, width and height parameters.

Install and use every day any quality image file manager.
Forget about Photoshop: it is too powerful and clumsy editor for such simple tasks.
Use online services only when there are no other methods at hand - and use Paint for single files.

Disclaimer: no dogs were harmed during the artistic or programming experiments. :)

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People upload photos to pages on social networks, to their websites, open topics on forums, send to friends and relatives via email, etc. Photos taken with modern cameras take up a lot of space on various media.

Users often face the question: “ how to compress a photo?", because the "large weight" of the image causes the following inconveniences:

The problem of traffic - there are still countries and cities in the world where you can only use wireless Internet, accordingly, it is charged according to the number of bytes downloaded, so photos need to be compressed so that a person can download them if necessary, and not spend all the traffic on one image;
Loading speed of web pages – even those users who are connected to a high-speed Internet will have problems loading “heavy” photos, that is, the entire page will be loaded, and the photo will still take some time to load. You also need to remember about loading the page on devices using mobile Internet, the speed of which is low, and too heavy photos slow down this process even more;
Size restrictions - social networks and various sites set restrictions on the size of uploaded photos - this is necessary for their normal functioning;
Original size - photographs that take up a lot of space on storage media are actually several times larger in size than the one in which they are displayed on the screen, which causes various incidents with downloading to/from the Internet.

To avoid such problems, you need to compress photos for the Internet. For personal use, that is, viewing on your PC or laptop, this is not necessary.

Online photo compression

Compressing a photo online is the easiest and fastest way to solve the problem that the image weighs too much. To do this, you need to go to an online service that focuses on photo compression: basically, it is reducing the size of pictures by reducing the expansion.

Below are several free online services of this kind:

Image Optimizer - this service provides the ability to compress, optimize and resize images. The service's interface is easy to use: to get started, you need to upload a photo from your device, select the size and optimization option. You can also install this optimizer on your computer:

Web Resizer – using this online service you can edit a photo: compress, crop, add borders, change brightness, contrast, saturation and some other parameters:

PunyPNG is also a free program that works with various image formats and is effective in reducing the weight of images:

Photo compression programs

« How to compress photo size?“- such a question often appears before beginning photographers, and not only before them.

The biggest mistake is trying to make a photo smaller without changing the image size, but sacrificing the quality of the image. The result of such actions is a blurry image that does not fit on the screen. To get a good picture with little weight, you can use the simplest graphic editor called Paint:

Reducing the size of an image in paint is not difficult if you follow these steps:

Open an image using Paint;
Click on the “Resize” button, after which the window will open:

In the “change” field, activate “interest”, check the “ maintain proportions", we write down a number that determines how many percent the reduced image will be from the original one. In our case, this is 80%. After clicking “Ok” you can see the result:

Save the result by clicking on “File”, “Save as”. Next, you need to select an extension and enter a name. This procedure resulted in a reduction in size to half the original size.

You can also reduce the weight of a photo in the professional graphics editor Photoshop:

To reduce weight you need:

Open the photo in Photoshop;
Enable the " Save for web and devices» ( Save for Web & Devices), which is located in the “File” menu:

In the window that opens, set the settings: format and quality. Reduce quality ( quality) more than 50% is not recommended. At the bottom of the window there are settings for width and height, with which you can also reduce the size:

All that remains is to save the resulting image. Below is the result of the manipulations performed:

How to compress photos for sending by email or just for posting on the Internet? As mentioned above, before sending, you need to reduce the weight of the images. When performing compression, it is advisable to adhere to the following rules:

The weight of the image should not exceed 100 KB, and the size should be 800 by 600 pixels - this is due to the fact that there are still monitors that do not work well with giant pictures;
When the weight of a photo is reduced, marks may appear on the photo, indicating that it has been compressed. To hide this, you need to blur the photo a little using the Blur tool in Photoshop, setting the value to 0.1 - this will be enough;
It is best to save images in JPEG format.

We compress a lot

How to compress several photos at once? Often there is a need to send someone a large number of photos or simply post them on a website. Naturally, first the weight of the photo needs to be optimized. This can be done either online or using programs installed on a PC or laptop.

How to compress many photos online at once? To solve this problem, there are specialized services, such as Kraken.io. This service allows you to process a large number of photos at one time, but their total weight cannot exceed 10 megabytes.

For better photo processing, it is better to use applications that are installed on your computer. An example of such a program is Picture Combine - this graphic editor allows batch optimization of photos. The program is easy to use, so anyone can master it:

How to compress multiple photos in Photoshop

Photoshop also has the ability to compress multiple photos at once. To do this, you need to create an action – an action algorithm for batch processing of photos.

Below are the steps to create such an algorithm:

Create two folders. First, save the images that need to be reduced. The second will store already processed photos;
Next, you can start recording the photo processing algorithm. In the "Window" menu ( Window) you must click on the item “ Creating a new operation» ( Create new action), enter a name for the new action and click on “OK”;
Recording actions will begin after clicking on the “Start Recording” button ( Degin recording);
To reduce a photo, you need to open the file from the folder in which the images for processing are stored (File -> Open) (File -> open). In the "Image" menu ( Image) choose " Image Size» ( image size) — the extension and size settings window will open. After making changes, you must click on “Ok”. You can now save the thumbnail image to an empty folder using the Save As command ( Save as);
Next, you need to stop recording the algorithm by clicking on “ Stop recording» ( Stop recording);
To automatically process the remaining photos in the File menu, select “Automation" ( Automate). Inside this menu, use the function “ Batch Processing» ( Batch);
To process the entire folder at once, you need to go to the “Source” menu ( Source) select “Folder” ( Folder), then click on “Select" ( choose) and specify the folder with photos. You also need to determine where the processed photos should be sent, to do this in “ Location" ( Destination) select “Folder” ( Folder) and using “Select” ( choose) indicate the created empty folder. To fully automate the process, you need to activate the “ Overwrite, Save Command As» ( Override action “Save As” commands), otherwise you will need to approve the saving path for each individual photo. To start processing, click “Ok”.

Compressing an entire folder

How to compress a folder with photos? This question usually arises when you need to save photos on a medium with a small capacity, for example, on a flash drive. Or when you need to send a large number of photos by email.

Why reduce the photo size?

Modern digital cameras are capable of taking pictures in fairly high resolution. And the photo file is 5-15 megabytes. If you reduce the weight of photos without losing quality before publishing them online, you will increase the speed of their loading onto the Internet and onto website pages.

Why do this? The size of modern digital photographs in terms of the number of pixels significantly exceeds the size of our monitor screens. Most often, users' screen sizes are as follows: 1280x1024 = 1310720 pixels; 1366x768=1049088 pixels. As you can see from the calculations, this is a little more than one megapixel, and modern cameras take pictures from 1 to 20 megapixels. But for viewing photos of 1 megapixel size there is plenty of space on the screen.

By the way, you can reduce the size of the photo in

Conclusion: when uploading to the Internet, the services of social networking sites will still reduce them in size, and the extra megabytes transferred to the Internet are your money for traffic thrown away.

Riot - a program to reduce the size of graphic files

Photo Processing Software (RIOT) is a free application that allows you to visually adjust your compression settings while keeping your file size to a minimum. Using dual viewing and a single interface, you can compare the original and optimized images and immediately see the resulting file size.

RIOT photo processing software is easy to use, but powerful enough for advanced users. It makes it easy to control compression, number of colors, image format (JPEG, GIF or PNG) for the output file. RIOT can be integrated as a plugin into well-known programs such as GIMP, IrfanView and XnView.

Riot photo processing software

Main features:

allows you to reduce the weight of the photo;
opens many types of images, including rare ones, as well as Adobe Photoshop PSD files;
save and optimize JPEG, GIF and PNG in a simple, easy-to-use user interface;
work in a double window: (original - optimized image) or one view (optimized image).
automatic preview of the resulting image
on-site compare features (alternativelly display the original image with a more optimized image to notice small pixel changes)
compress the file to the desired size;
fast processing;
batch processing (processing multiple files at once)
Transparency processing options
ability to save metadata (comments, IPTC, XMP Adobe, EXIF profiles, ICC profiles). Unsupported metadata is deleted;
transfer of metadata between image formats (the destination format must support them);
general tools: pan and zoom, rotate, mirror;
basic image settings: brightness, contrast, gamma, inversion;
visually reduce the number of unique colors in PNG and GIF images to reduce file size;
resizing the image using well-known filters (for example: Lanczos3, Catmull Rom, Bicubic, etc.)
compression and results are comparable to commercial products, even better.

You can download this program from official website http://luci.criosweb.ro/riot/

How to work in the Riot program?

The program has an English interface, but this will not affect your interaction with it. Everything is intuitive. Watch the video below.

I think you will like this program.

How to reduce jpg file size a lot at once

In RIOT, you can batch process several photos at once, which is very convenient when you have a large number of processed images. For batch processing, we will need to create a folder for the compressed photos. And then press the button Batch. We get a dialog box.

Further actions:

On the menu Additional tasks choose Resize(change of size). Set the desired photo width and check the box to proportionally reduce the image size.
Select the folder with the original photos (see picture)
Specify the folder for compressed images
Press the button Start and wait for processing to complete.

After processing, your photos will be compressed according to the specified parameters. Now they can be used to upload to the Internet.

Smile One unknown photographer, invited to the party, took several of his photographs to show them to the guests on occasion. The hostess, after looking at the pictures, exclaimed: - What amazing photographs! You probably have a very expensive camera! The photographer didn’t answer her, but bowing at the end of the evening said: “Thank you, it was a great dinner!” Apparently you have very good pans!

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When working with a large number of photos, quite often there is a need for batch processing!
One example of this batch processing is when you need to resize multiple images at once. In this article I will tell you how to do this using the program - XnView.

For example, we have a specific situation: we need to send a certain number of photos by mail or upload them to social networks (any other service), where there is a limit on the size of the uploaded file. Surely we won't manually resize each image? That's right, because there are special programs for this, one of which we will look at today. Viewer and editor of graphic files - XnView. By the way, I wrote about how to quickly resize an image in the article “”. I recommend to read.

The program has a simple, understandable and convenient interface, high speed. To get started and launch (version).

This is what the program window looks like; on the left → all folders and files of the system, at the top → toolbar. In this case, we are interested in the Transform tool.

1. Using the Ctrl+O key combination, open the folder with the files that we will edit.

2. Now our files are in the program window → press Ctrl+A (select all files) → and click on the “Transform” tool.

3. A new “Batch Processing” window will appear in front of us. Here you need to specify the folder where to save the images after processing and click tab → “conversion”.

4. In the left column, select the desired processing parameter. In this case it is “Resize”. Next, the add button becomes active → click add. Now that the Resize tool is selected in the right window of the program, set the parameters.

The conversion parameters can be set arbitrarily (by specifying the width and height yourself), or you can let the program do this as a percentage. By choosing, for example, 25%, you will receive this percentage of the original. I leave the “Maintain proportions” parameter as it is, but uncheck the “change height with width” option.

5. After the settings have been made, click → “Run” and start the process. When the process is complete, open the final folder and check the result.

The first screenshot shows the result before batch processing; on the second → after

Good day, dear friends, acquaintances, readers, admirers and other individuals.

A digital camera, a mobile phone with a camera, or anything else capable of taking photographs is now found in almost every home. In connection with this, a fairly significant number of snapshots, images and other picture-differences sometimes accumulate on the computer, which take up a significant amount of space on the hard drive (;)).

In connection with the above, I will share with you the most valuable program that I found on the Internet, which will help you significantly simplify the processing process, reduce the weight of photographs and images without much loss in quality, and also make it possible, say, to quickly work with a large number of add various “flavours” to your pictures (for example, highlight them with a frame or put your signature in the corner) or convert them into the format you need.

Let's get started.

FastStone Photo Resizer, - a program for mass photo and image processing

As you already understood from the title, the program is called “FastStone Photo Resizer” and is engaged in re-compressing, simplifying, signing, changing the format, adding a frame and doing other miracles with your photographs, not individually, but with all selected ones at once.

It is completely free, fast and its only drawback (if this can be considered a drawback) is the English language. However, users in need will probably find a localization tool on the Internet, but for now I’ll tell you how to work with this happiness without any unnecessary installations and ideas;)

The installation is extremely simple and I won’t dwell on it (just run the file and click the “Next” button), so let’s quickly move on to setting up and using it.

To begin, using the good old Windows Explorer, take a few images and copy them to some folder. We will work with them, so to speak, in test mode, so that you understand what's what.

As a matter of fact, on the left, in this window, you can select a folder on the disk (to do this, click on the button with the image of three dots) where you have the images with which you will work. Select the folder with images that you prepared in advance (above in the text of the article).

If you did everything correctly, you can now select specific images in the list with which you will work and, by clicking the "Add" button, move the desired photo from the folder to the right window, i.e. into a window containing a list of photos that will be edited.

You can select several photos by holding down the "Ctrl" key (individually) or "Shift" (list) and clicking on the photo name. You can remove photos from the right list by highlighting their name and clicking the "Remove" button. Add everything at once by pressing the "Add all" button.

The "Output Format" column allows you to select the format in which the photos will be after editing. That is, if you need, for example, to change the resolution from .bmp to .jpg, then set “JPEG Format (*.jpg)” in this field. Next to this line there is also a “Settings” button, which will allow you to set optimization settings (quality, compression method, etc.) in order to save the maximum amount of space after converting/optimizing photos/images:

The "Output Folder" column allows you to select the folder where the program will save the photos after editing. Specify a folder using the "Browse" button.

The "Advanced Options" button allows you to set photo editing settings (pictures or whatever you have):

Let's take a closer look at what's what so you have an understanding:

The first tab, called "Rezise", allows you to set the size of photos in pixels. It is optimal to choose something like 1280 x 1024, because it is unlikely that if you are not going to print these pictures, you will need a higher resolution. Just in case, check the box " Do not resize when original size is less than the new one", which will tell the program that there is no need to change the resolution if the file is lower (and not higher) than specified (that is, so that the photo does not stretch);
The second tab, "Rotate", allows you to flip photos horizontally or vertically, or rotate them by "90-0180%: If you need this, then check the “Flip / Rotate” checkbox, and then either the “Flip Horizontally”, or “Flip Vertically”, or “Rotate” checkbox;
The "Crop" tab allows you to crop your photos. I don’t recommend using it, because in streaming mode you can cut things off, which will be offensive later;
The "Canvas" tab allows you to add.. mmm.. something like fields/background, but why this is needed is personally not clear to me, because for this there are settings for the frame around the photo;
"Color Depth", "Adjustments" and "DPI". The first allows you to reduce the color palette, which, from the point of view of optimizing the weight of the file, can be very useful, but from the point of view of quality, it can lead to dire consequences;
"Adjustments" allows you to in-line change a bunch of goodies, such as brightness, contrast, gamma and other things:

I would not recommend using it, because each photo should have its own parameters and massively redrawing them without looking at what happens is a rather controversial decision;
"DPI" allows you to set the number of dots per inch, which is useful when printing and is often not needed in our case;
The "Text" tab allows you to sign photos with text. One of my favorite options as a photographer, with which you can put, say, a tag on photos or the date of shooting:
This is done very simply: enter the text in the upper right corner, then use the "Font" button to select the font, font size, etc. Next, set, if necessary, the background, shadow and their (background and shadow) colors with the "Shadow" and "Background" checkboxes (you can round the corners of the background with the "Round" checkbox), and the transparency of the inscription with the "Opacity" slider;
And finally, using the mouse or the “Position” option, we set where this very inscription will be located: You can make a preview (by the way, of any changes that we specified in the program) and see what our inscription will look like, using a button with a piece of paper and a magnifying glass;
The penultimate tab, called "Watermark", allows you to protect your photos with the so-called watermark, that is, attach an image of, say, a logo:
This is done by selecting the image itself, using the button with three dots and, again, by setting up all sorts of options such as transparency, shadow, position, etc., which I described above;
Well, the last tab, “Border”, will allow you to create a frame for your photos, and even, if necessary, a multi-faceted one, so to speak:
The setup is generally simple - simply tick the number of frame strips ("Frame 1-2-3"), set their thickness ("Width" parameter) and color ("Color" parameter) and, using the preview button, bring it to your ideal.

Having completed all the settings, click the “OK” button and, returning to the program window, making sure again that you have set everything you need, feel free to click on “Convert”.

Then all that remains is to wait for the conversion process, enjoying the numbers that indicate how much space is saved from each photo (the last column, which is called "Save (KB)"), and then go to the folder that was set as the save location ("Output Folder") and look at the result.

That's all for now. Let's move on to the afterword.

Afterword

Here is such a tool for mass photo processing and saving free space (I must say that sometimes you can save entire gigabytes), and it’s just a useful thing.

As always, if you have any questions, additions, etc., please feel free to comment on this post.