Compress Image to Exact KB
Compress an image to an exact KB size online free — shrink a photo or signature to under 20KB, 50KB, 100KB or 200KB, or your own target, for forms, job portals and exam applications. In your browser, no upload, no signup.
Compress Image to Exact KB
Pick a target size and we shrink your photos in your browser until they fit under it. We always show the real final size — never a promised number we did not reach.
Target: 100 KB (100.0 KB). “Under target” means the real file is at or below this number.
Signature mode starts from a smaller width, which helps tiny targets a lot.
About our Compress Image to Exact KB
Compress an image to an exact KB size in your browser — shrink JPG, WebP and PNG photos until they fit under a target you choose, with presets for 20, 50, 100 and 200 KB plus a custom target and dedicated photo and signature modes for form uploads. For JPG and WebP it searches quality levels and then reduces dimensions if needed; for PNG it reduces dimensions and offers JPG conversion, since PNG has no quality setting. Every result shows the real final size next to your target, so you always know whether a file actually got under it — the goal is at or under your target, not an exact byte count.
All Done is a leading platform offering free online utility tools and browser-based productivity applications, requiring no software installation or registration. Every web utility is fully optimized for speed, delivering secure, client-side data processing and instant results directly inside your browser tab.
Frequently Asked Questions
How does the tool reach my target size?
For JPG and WebP it binary-searches the quality setting, then shrinks the dimensions step by step if the file is still too big. The final size shown is the real file size, measured after compression.
Will my file be exactly the target size, like exactly 100 KB?
No — the goal is at or under your target, not an exact byte count. The tool never claims a size it did not achieve; each file is labelled Under target or Still over target with its real size.
Why does PNG behave differently from JPG?
PNG has no quality slider, so it cannot be squeezed the way JPG can — only shrinking its dimensions helps. If a PNG still stays over target, the tool offers a JPG conversion, which is usually far smaller.
What is the difference between photo and signature mode?
Photo mode keeps the image looking good at full size. Signature mode starts from a smaller width (500 px), which makes tiny targets for forms and signatures much easier to reach.
What target size should I pick for a form or portal?
Use the limit your form states — common ones are 20KB for signatures, 50KB for photos on job and exam portals, and 100KB or 200KB for larger uploads. Pick that preset; if a file still stays over target, the tool says so with its real size instead of claiming success.