Reduce Image Size Online Free
The fastest way to make any image smaller — for email, web and storage.
or drag & drop your image here
Pick a target size to force the output under a limit, or leave it on your chosen size and just adjust quality manually.
Why compress images?
Uncompressed photos from modern phones are often 3–8MB — too big for many upload forms, slow to email and heavy for websites. This free tool compresses JPG, PNG and WEBP to any size you choose, with a quality slider for fine control.
Most images shrink by 80–95% with no visible difference on screen. Set an exact target with the dropdown, or just drag the quality slider and watch the file size update live.
Processing is 100% local — your images are never uploaded to any server. Try Compress to 100KB or Reduce Image Size in KB.
How to use this tool
Upload your image
Click "Choose Image" or drag and drop your JPG, PNG or WEBP file. The file is processed entirely on your device.
Pick your target
Choose the target file size. The tool lowers quality first to keep your dimensions, and only reduces dimensions if the target is very small.
Download the compressed image
When the file fits your target, click Download. Check the before/after sizes to see how much you saved.
Why choose this image compressor?
Live quality control
Drag the quality slider and watch the file size update instantly.
Dramatic savings
Most images shrink 80–95% with no visible difference on screen.
Private by Design
Images never leave your device — processed 100% in your browser.
100% Free
No signup, no watermarks, no limits. Use it as much as you need.
Frequently Asked Questions
How does image compression work?
Compression makes a file smaller by removing data the eye barely notices. JPG and WEBP use lossy compression that discards fine detail in exchange for much smaller files; PNG is lossless, so it keeps everything and stays larger.
What is the best format for a small file size?
For photos, JPG gives the best quality per kilobyte. WEBP is even smaller and supported by every modern browser. PNG is only efficient for graphics with flat colors or transparency.
How do I reduce image size?
Upload your image and choose a target size. FastResize lowers the quality and, if needed, the dimensions until the file is smaller. Download the result — no upload, no signup.
Why should I reduce image size?
Smaller images load faster on websites, are accepted by upload forms, send quicker by email and take up less storage. A photo from a modern phone is often 3–8MB; reducing it to 100–500KB is usually invisible to the eye.
What is the best format for small file size?
For photos, JPG gives the best quality-per-kilobyte. WEBP is even smaller but is not supported by every older tool. PNG is only good for graphics with transparency.
How much can I reduce an image?
Most photos shrink by 80–95% without obvious quality loss. Extreme targets like 20KB will soften the image, which is fine for forms and thumbnails.
Is it safe to use on a shared computer?
Yes — because your images never leave the browser, nothing is stored or uploaded.