Image Compressor
Add your JPG, PNG or WebP files and this image compressor shrinks them, showing the new size beside the original. Adjust the quality for each image with the slider, compare the result against the original in the preview, and download when it looks right. It is free, and the page states that your images are processed in your browser and never uploaded.
About Image Compression
Compression makes a file smaller by storing the image’s data more efficiently, and in most cases by discarding some of it. There are two kinds. Lossy compression, used by JPEG and available in WebP, throws away fine detail that the eye barely notices. The file gets much smaller, but the lost detail does not come back. Lossless compression rewrites the data more compactly without discarding anything, which is how PNG works, but the savings are smaller.
The quality slider is how you control the lossy trade-off. A lower setting makes a smaller file and a softer image, so in effect it works as an image quality reducer that you steer by eye. A setting of around 70 to 80 is a common starting point for photos, and the preview shows you what you are giving up.
How to Use the Image Compressor
1. Drag and drop your images onto the page, or browse to pick them. JPG, PNG and WebP files are supported.
2. The files compress automatically, with each new size shown beside the original.
3. Open an image’s preview, compare it with the original, and move the quality slider until you are happy with the balance.
4. Download the images one at a time or together.
How to Reduce Image File Size
The compressor handles quality. A few steps before and after it make a bigger difference to the final size:
1. Resize first if the image is larger than it needs to be. A photo that is 4,000 pixels wide but shown at 800 pixels wide carries pixels nobody sees. Shrink the dimensions in your photo editor or gallery app, then compress.
2. Use the right format. Photos suit JPG or WebP. Screenshots, logos and graphics with sharp edges or transparency suit PNG or WebP.
3. Lower the quality gradually. Move the slider down a little at a time and check the preview, instead of jumping to the lowest setting.
4. Check the result at full size. Look for blur, blocky patches or smeared color before you download.
5. Keep your originals. Compress copies, so you can always start again from the full-quality file.
Compress Photo Size for Email, Uploads and Websites
Used as a photo compressor, the tool helps in a few common situations:
• Upload forms and portals: many cap the size of each file. Compress until the size shown beside the file is under the limit.
• Email attachments: smaller photos send faster and are less likely to bounce.
• Websites and blogs: lighter images help pages load faster, especially on mobile connections.
• Storage and backups: a folder of compressed photos takes up much less room.
Choosing the Right Image Format
| Format | Best for | Worth knowing |
| JPG / JPEG | Photographs | Lossy compression. Cannot keep transparent areas. |
| PNG | Screenshots, logos, graphics with text or sharp edges | Lossless. Supports transparency. Photos saved as PNG tend to be large. |
| WebP | Images for websites | Often smaller than JPG or PNG at similar quality. Supports transparency and both lossy and lossless compression. |
Common Mistakes to Avoid
❌ Mistakes to Avoid
✓ Solution:
Over-compressing until the image looks bad. Push the quality too low and you get blur, blocky patches and banding in smooth areas such as skies. Check the preview at full size and move the slider back up a step.
Using the wrong format for the image. A photo saved as PNG makes a heavy file. A logo or screenshot saved as JPG gets fuzzy edges around text and lines.
Not resizing first. If the image has far more pixels than it will ever be displayed at, quality settings alone will not shrink it enough. Reduce the dimensions in an editor first, then compress.
Compressing the same image again and again. Each lossy save discards a little more detail. Compress once, from the original file.
Ignoring transparency and color needs. JPG cannot keep transparent areas, so an image with a see-through background belongs in PNG or WebP. Check that colors still look right in the preview.
Frequently Asked Questions
Add the image to the compressor, check the new size shown beside the original, and adjust the quality slider until the preview looks good. If the file is still too large, resize the image to smaller dimensions first and compress again from the original.
Compress the photo and compare the size shown with the limit. If it is still over, lower the quality a little more, or reduce the pixel dimensions in a photo editor and compress again.
Lossy compression does discard some detail. At moderate settings the difference is usually hard to see, and at aggressive settings you will see artifacts. The before-and-after preview lets you judge it for each image.
It depends on the image, its format and the quality setting. The tool shows the new size beside the original, so you can see the saving for each file.
For photos, around 70 to 80 is a good place to start. Check the preview, then go lower if the image still looks clean, or higher if you notice artifacts.
JPG/JPEG, PNG and WebP.
Yes. Add a batch of images and they compress together. You can download them individually or together.
The page states that compression runs locally in your browser and your images are not uploaded.
Yes. It is free to use.
Compress Your Images
Add your images, watch the file sizes drop, and check each one in the preview before you download. Keep the originals in case you need them again.
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