Compress image files online for free and keep them looking good. Add JPG, PNG or WebP pictures, enter a target size in KB, and the tool shrinks them in your browser. Nothing is uploaded.
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Your images are processed inside your browser and are never uploaded to any server.
How to compress image files in 3 steps
- Add your images by dragging them in or clicking the box.
- Type the file size you need in the Target size box, for example 100.
- Download each compressed image, or all of them together as a ZIP.
Why compress image files?
- Smaller images make web pages load faster, which visitors and search engines appreciate.
- Many online forms and portals set a maximum file size for uploads.
- Small files are quicker to email and share in chat apps.
- They use less storage on your phone or computer.
How this tool can compress image quality and size
You choose a target size in KB. For JPG and WebP the tool searches for the highest quality that still fits. If the picture is still too large, it shrinks the dimensions in small steps. PNG files cannot be compressed by quality, so they are made smaller by reducing their dimensions. Choose JPG or WebP under Convert to for the smallest files. See the image file type guide from MDN for more about formats.
Quick links: compress image to a set size
Need an exact limit? Try one of these pages: a 20 KB limit, 50 KB, 100 KB or 200 KB.
When should you compress image files?
The best moments are before you upload pictures to a website, before you attach them to an email, and whenever a form shows a maximum file size. It also helps when your phone is running out of storage, because large photos take up a surprising amount of space. Smaller files are quicker to open on slow connections, which matters for visitors on mobile data.
Tips to compress image files without losing detail
- Use JPG or WebP for photos, because they compress much better than PNG.
- Keep PNG for screenshots with small text, or raise the target size a little.
- Resize first if the picture is much larger than you need.
- Avoid compressing the same file again and again, because each pass loses detail.
- Keep a copy of the original image.
Common problems and fixes
- The image cannot reach the target: very detailed or very large pictures may need smaller dimensions. The tool tells you the smallest size it reached.
- The download button does not appear: the file may be damaged or in a format your browser cannot read. Try opening it in an image viewer first.
- The result looks too soft: raise the quality slider, because lower values trade sharpness for a smaller file.
- The colours look slightly different: some browsers convert colour profiles. Check the image in the app where you plan to use it.
- A large photo feels slow: your own device does the work, so close other tabs or lower the maximum width.
Frequently asked questions
How do I compress image files online?
Add your images, type a target size in KB if you need one, and download the results. The tool adjusts quality and size automatically.
Will the image quality drop?
Some detail is lost when a file is made smaller, but the tool keeps the quality as high as the limit allows.
What if the image cannot reach the target?
The tool tries lower quality first and then smaller dimensions. If it still cannot reach the limit, it tells you the smallest size it managed.
Are my images uploaded to a server?
No. Everything happens inside your browser on your own device, so your files stay private.
Is this tool free?
Yes. It is free to use, with no sign-up and no watermark.
More free image tools
- Compress Image to 20KB
- Compress Image to 50KB
- Compress Image to 100KB
- Compress Image to 200KB
- Resize Image Online
- Crop Image Online
- Free Image Converter
See the full list of free online image tools.