Compress Image to 20KB Online

Compressing an image to 20 KB here is automatic. Drop a JPG, PNG, or WebP file up to 50 MB, choose an output format, and the page re-encodes the image in your browser until it fits at or under the target. The result card shows the original size, the compressed size, and the quality setting that was used, so the change is never a guess. A typical 800px avatar that starts at 260 KB lands under 20 KB with no visible loss at its normal display size.

1. 1Drop or select a JPG, PNG, or WebP file. The limit is 50 MB.
2. 2Pick JPG or WebP output. WebP is smaller at the same quality and keeps transparency.
3. 3The tool encodes at the highest quality that still fits 20 KB and reports the size and quality used.
4. 4Download the result. Your original file is never modified and never leaves your device.

The tool does not use a fixed quality setting. It first encodes the image at quality 100 and, if that already fits under 20 KB, returns it unchanged. You never lose detail on a file that was small to begin with, and the tool never upscales an image to fill the budget. When quality 100 is too large, it runs a binary search across up to nine encodes to find the highest quality that stays at or under 20 KB.

• Original size to compressed size, so you see the exact saving.
• The quality setting actually used for your file, from 1 to 100.
• A badge that reads "Fits in 20 KB" or "Smallest possible" when the target could not be reached.

Some images will not make it. A noisy photo full of fine texture, such as foliage or a crowded street scene, can still sit above 20 KB even at quality 1. A 2000px shot of leaves might stop at 34 KB. When that happens the tool returns the smallest encode it can produce and flags the result as "Smallest possible" instead of pretending the target was hit.

For a tight 20 KB budget, WebP is usually the better pick because it compresses more efficiently than JPG at the same quality and keeps transparency. A transparent logo can become a 20 KB WebP without losing its clear background. Pick JPG when the receiving system is old or will not accept WebP; JPG fills transparent areas with white, which is fine for photos but changes the look of logos and icons.

• WebP: smaller files, keeps transparency, works in every current browser.
• JPG: maximum compatibility, but transparent areas turn white.
• Both are lossy, so the quality trade-off applies to each.

Yes, when the photo is large and detailed. Resizing discards pixels, which is a bigger lever than compression alone for hitting a very small target. A 3000px camera photo that stalls at 90 KB under compression will usually fit under 20 KB once it is resized to 400px wide, because there are far fewer pixels left to encode. Use the resizer first, then run the fixed-size tool on the smaller file.

Everything on this page runs through the Canvas API inside your browser. Nothing is uploaded, no account is required, and the encode finishes in about a second because there is no upload step to wait on. That makes the tool a reasonable choice for document scans, ID photos, and other sensitive files you would not want to send to a third-party service.