Compress an Image to 20KB

How to compress an image to 20KB

1. Drop your photo into the box above (the target is already set to 20 KB).
2. The tool searches for the highest quality that still fits under the limit, and shrinks the dimensions automatically if quality alone isn't enough.
3. Download the result. The file size is shown next to each image so you can confirm it's under the cap before you upload it.

Everything happens on your own device, so there's no upload wait and no copy of your photo left on someone else's server.

Why 20KB is a hard limit to hit

20KB is very small for a photograph — most phone photos are 2,000 to 5,000KB, so you're asking for roughly a 99% reduction. Quality settings alone won't get there on a full-resolution image, because a 4000-pixel-wide photo has too much detail to encode in 20KB at any quality.

That's why this tool reduces the pixel dimensions as well when it has to. It lowers quality first, and only starts scaling the image down once the minimum useful quality still isn't small enough. The result is a photo that actually fits, rather than one that misses the limit.

Forms that ask for 20KB photos

Strict kilobyte caps show up most often on government and examination portals — application forms for competitive exams, recruitment sites, visa and identity document uploads, and older institutional systems. These limits exist because the systems behind them were built when storage and bandwidth were expensive, and the caps were never raised.

Many of these forms specify dimensions too (for example 200×230 pixels for a passport-style photo). If yours does, set Resize → Max width/height to the larger of the two numbers before compressing — hitting 20KB is much easier at small dimensions, and you'll keep more visible quality.

Getting a better-looking result at 20KB

• Crop before you compress. Removing background you don't need means the remaining pixels get more of the budget. A tightly cropped head-and-shoulders photo looks far better at 20KB than a full-body shot.
• Start from the best original. Compressing an already-compressed image compounds the damage. Use the original file from your camera or phone if you still have it.
• Set the dimensions the form asks for. If the form wants 200×230, don't send a 3000-pixel image squeezed to 20KB — it will look far worse than one resized properly first.
• Scanned signatures and documents compress much better than photographs because they're mostly flat white. These usually hit 20KB with quality to spare.

Nothing is uploaded

Compression runs inside your browser. Identity photos, signatures, and scanned documents are exactly the kind of files you shouldn't be handing to an anonymous web service, and with this tool you don't have to — the image never travels anywhere. You can disconnect from the internet after the page loads and it will still work.