How to compress an image to a specific size in KB
- Upload your photo, scanned signature or document image.
- Enter the target size in KB, for example 20, 50 or 100.
- Click Compress. The tool searches for the highest quality that stays under your target.
- Check the final size and preview, then download. If the form also specifies pixel dimensions, resize first with Resize Image.
Made for upload limits
Many online application portals, including those for exams, government jobs, scholarships and recruitment in India, ask for a photograph under a limit such as 50 KB and a signature under about 20 KB, usually in JPG format and sometimes with fixed pixel dimensions. The exact rules differ from one notification to the next, so always read the official instructions before uploading.
To compress an image to 20 KB or 50 KB for an exam or government form, choose the preset and the tool finds the best quality that fits.
How the target is reached
Target-size compression works by adjusting JPEG quality, so results are saved as JPG files. The tool searches for the highest quality whose file still fits under your limit. If even a low quality cannot get there, it gradually reduces the image dimensions as well. When a target is simply impossible without making the image unusable, it tells you instead of producing a poor result.
Sites measure kilobytes differently: some count 1 KB as 1,000 bytes and others as 1,024. Aiming a little below the limit, for example 45 KB for a 50 KB maximum, avoids rejected uploads.
Tips for clear results
Crop away everything except the face or signature first with Crop Image; fewer pixels leave more of the budget for detail. Photograph signatures in good light on plain white paper. For passport-style photos at official sizes, start with the Passport Photo Maker.
Frequently asked questions
Will the file be exactly 50 KB?
It will be at or just below your target. JPEG sizes change in steps, so landing on an exact byte count is rarely possible.
Why did the dimensions of my image change?
When lowering quality alone could not reach the target, the tool reduced the dimensions as well to keep the image readable.
Why was my upload rejected even though it is under the limit?
The portal may count kilobytes as 1,000 bytes, or require specific pixel dimensions or a different format. Check its instructions.
What format is the result?
JPG, which almost every application portal accepts.
Is my photo or signature uploaded?
No. Compression happens on your device, which matters for identity documents.