# Compress JPG to 20 KB > Compress a JPG photo to 20 KB or less for the signature and photo fields on online application forms. Runs in your browser, so your files never leave your device. Free, no sign-up, no watermark. URL: https://www.converterrr.com/compress-jpg-to-20kb Shrink a JPG to 20 KB or less for the signature and photo fields on online application forms. API: `POST /api/v1/jobs` with `"operation": "compress", "target_size": "20kb"` (paid plans). ## How to compress a JPG to 20 KB 1. **Add your JPG.** Drop one or more JPG files onto the compressor above, paste them, or click to browse. 2. **20 KB is preset.** The target is already set to 20 KB, and each file is compressed to land at or just under it. You can switch to another size or a percentage to reduce by. 3. **Compress.** Click Compress. The JPG is processed in your browser; nothing is uploaded. 4. **Check and download.** Check the new size, then download each file or all of them as a ZIP. ## Good to know - 20 KB is tight. Expect a photo to be scaled down to a few hundred pixels across. That's normal for signature and ID-photo fields, which display small anyway. - At 20 KB, a detailed JPG photo comes out around 430 × 290 px at good quality; simpler images can stay larger. - 20 KB here means 20,000 bytes, so the result also fits forms that count 1 KB as 1,024 bytes. - JPG compression runs entirely in your browser with WebAssembly, so nothing is uploaded and your files never leave your device. ## What fits in 20 KB Roughly how large a detailed JPG photo can be at 20 KB. Simple images, like documents and graphics, can stay larger. | Image | Roughly fits | Quality | | --- | --- | --- | | Photo (3:2) | ≈ 430 × 290 px | Good | | Photo (3:2) | ≈ 580 × 390 px | Acceptable, some artefacts | | Square photo or avatar | ≈ 350 × 350 px | Good | _Rough guide for detailed photos. Real results depend on detail, noise and colour._ ## What 20 KB is typically for - Scanned signatures on exam, job and government application forms - Passport-style photos on forms that ask for a very small file - Avatars, icons and small thumbnails Limits vary by site and change over time; check the exact number where you're uploading. ## How JPG gets smaller Re-encodes with an optimised JPEG encoder at a tuned quality and strips bulky metadata. [Compress JPG by quality level instead](https://www.converterrr.com/compress-jpg) ## Neighbouring sizes - [Compress JPG to 50 KB](https://www.converterrr.com/compress-jpg-to-50kb): ID photos & form uploads - [Compress JPG to 100 KB](https://www.converterrr.com/compress-jpg-to-100kb): 100 KB upload limits Got a mix of formats? [Compress any image to 20 KB](https://www.converterrr.com/compress-image-to-20kb). ## JPG to 20 KB: frequently asked questions ### How do I compress a JPG to 20 KB? Drop the JPG onto the compressor above. The 20 KB target is already set, so just click Compress and download the result. ### Will the file be exactly 20 KB? It aims to land at or just under 20 KB. 20 KB here means 20,000 bytes, so it also fits sites that count 1 KB as 1,024 bytes. ### How much quality will I lose at 20 KB? 20 KB is tight. Expect a photo to be scaled down to a few hundred pixels across. That's normal for signature and ID-photo fields, which display small anyway. At 20 KB, a detailed JPG photo comes out around 430 × 290 px at good quality; simpler images can stay larger. ### My JPG is already smaller than 20 KB. What now? Then it already fits, and compressing it further would only cost quality. Upload it as it is, or pick a smaller target if you need it smaller still. ### What if my JPG can't get down to 20 KB? Very large or detailed images are scaled down further to reach 20 KB. If the result is too small, pick a larger target. ### What is 20 KB typically needed for? Common reasons: scanned signatures on exam, job and government application forms; passport-style photos on forms that ask for a very small file; avatars, icons and small thumbnails. Limits vary by site, so check the exact number where you're uploading. ### Is my JPG private? Yes. It's compressed inside your browser and never uploaded.