Resize an image to KB or MB — free, online, private
Pick the limit a form or website gives you. The tool finds the largest, sharpest image that fits, on your device.
Processed in your browser — your image is never uploaded.
What you get
- Any limit, in KB or MB 20 KB for a form, 2 MB for a marketplace, or type your own. 1 KB counts as 1000 bytes, like upload checks do.
- Quality first, pixels second Compression is lowered step by step; the image is only made smaller when that is not enough. Proportions never change.
- JPG, WebP, AVIF or PNG Keep the format a form expects or switch to a smaller one. Any of the four can be read in.
- PNG keeps its transparency Logos and screenshots shrink by reducing colours first, so edges stay crisp and transparent areas stay transparent.
- See what changed A live size meter shows every attempt, and a before/after slider lets you check the result at full size.
- Nothing leaves your device The image is read and re-encoded in your browser. Free, no account, no watermark, and it works offline after the first visit.
How it works
- Choose the limit a form, portal or website gives you: 100 KB, 2 MB, or type your own.
- Add one image. JPG, PNG, WebP and AVIF are read directly on your device.
- The tool tries a few settings and keeps the largest, sharpest version that fits. Compare it with the original, then download.
What changes, and what does not
Compression is increased first; the picture is only made smaller when even strong compression is not enough. The aspect ratio never changes, so nothing is cropped. Camera metadata (EXIF, location) is not written into the result. 1 KB counts as 1000 bytes, the way upload forms and operating systems report sizes.
Which format should I pick?
JPG is accepted everywhere and is the safe choice for photos and application forms. WebP is noticeably smaller at the same look and most websites accept it. AVIF is smaller still but slower to create and not accepted by every form. PNG keeps transparency and sharp edges; it shrinks by reducing the number of colours before touching the pixels, which suits logos and screenshots but not photos.
Frequently asked questions
Why did the dimensions change?
Only when the limit could not be met at the lowest acceptable quality. The tool then scales the longest side down just enough, in small steps, and re-checks.
Why is my PNG photo so much smaller as a JPG?
PNG stores photos without loss, which makes them large. A JPG of the same photo at good quality is often ten times smaller, so photos reach a limit far more easily as JPG.
What if the limit is tiny?
The tool keeps going until it fits, even if the image ends up very small. If even a 16-pixel image is still over the limit, it tells you so and still offers that file.
Is anything uploaded?
No. The image is decoded and re-encoded in your browser; no server ever receives it. The tool also works offline after the first visit.