Reduce a JPG or PNG to an exact file size in KB — 20KB, 50KB, 100KB, 200KB or any custom limit. The tool tunes quality and resizes only if it has to, so the result always fits the limit your form or portal demands. Nothing is uploaded.
or drop image here or paste
Reduce Image Size in KB is a free online tool that reduces a photo to an exact file size in kilobytes. Many websites, government portals, and application forms set a strict upload limit — like 20KB, 50KB, 100KB or 200KB — and reject anything larger. Instead of guessing with a quality slider, you simply enter the size you need and the tool produces an image that fits, automatically choosing the best quality possible under that limit.
Click "Select Image" or drop a photo onto the page, then choose a target such as 20KB, 50KB, 100KB or 200KB, or type any custom size in KB or MB. The preview and the resulting file size update instantly, so you can confirm it fits before downloading. When you are happy, press Download to save the compressed JPG. It works the same on desktop and mobile.
Passport and visa applications, exam and job registration sites, banking and KYC forms, and many e-government portals only accept images below a fixed size — often 50KB or 100KB for a photo and 20KB for a signature. A file that is even slightly too large gets refused. This tool is built for exactly that: it guarantees the output is at or under the limit you set, so your upload goes through the first time.
The tool re-encodes your image as a JPEG and runs a binary search on the quality setting to find the highest quality that still fits your target size. If the target is very small for the image's dimensions, it automatically reduces the resolution and tries again, so even a tight 20KB limit is reachable. Because JPEG cannot store transparency, PNG images are placed on a white background before compression.
All compression happens entirely in your browser using your device's own processing. Your images are never uploaded to a server, there is no account or signup, and no watermark is added. Close the tab and nothing is left behind — a safe way to prepare ID photos, signatures, and documents for upload.