Reduce image size in KB
Set a target — 20, 50, 100 or 200 KB — and the tool finds the best quality that fits. Locally, no upload.
When you need a specific file size
Many forms and portals cap uploads at a fixed size: 20 KB for a signature, 50 KB for a passport photo, 100 or 200 KB for an application or ID scan. A generic compressor leaves you guessing; you try a quality, check the size, and repeat. This tool works the other way round — you enter the limit and it finds the result.
Pick a preset or type any value from 5 KB up, choose JPG or WebP and press the button. You see the final size, the pixel dimensions and the quality that was used before you download.
How the size is reached
The tool re-encodes your image at different quality levels and searches for the highest quality that still stays under your limit. If even the lowest quality is too large, it also reduces the pixel dimensions step by step until the file fits. That keeps the picture as sharp as the limit allows rather than simply crushing it.
For a photo the result is usually a JPG; WebP gets the same quality at a smaller size and is accepted by most modern sites, but check the portal first, because some only allow JPG.
Tips for very small limits
The smaller the limit, the more the image has to give. For a 20 KB signature or passport scan, crop to the relevant area first, because fewer pixels need fewer bytes. Photos with large flat areas compress far better than detailed scenes.
Everything runs in your browser. The image is not uploaded, which matters for documents such as IDs and signatures.
Privacy by design
All processing happens inside your browser. Your files never reach a server — there is nothing to store, transmit or share.
Learn more in our privacy policyFrequently asked questions
Load the image, select 100 in the target field and press Reduce size. The tool finds the best quality that stays under 100 KB.
It loses as little quality as the limit allows. If the limit is very small for the picture, the tool also lowers the pixel size and tells you.
JPG is accepted everywhere. WebP is smaller at the same quality but not allowed on every portal.
Yes. PNG, JPG and WebP go in; the result is saved as JPG or WebP.
No. The compression runs in your browser; nothing leaves your device.