# Compress image to 20 KB > Reduce any photo or image to 20 KB or less for the signature and photo fields on online application forms. Works with JPG, PNG, WebP, HEIC, GIF and AVIF; most formats never leave your browser. Free, no sign-up. URL: https://www.converterrr.com/compress-image-to-20kb Shrink any photo or image to 20 KB or less for the signature and photo fields on online application forms. JPG, PNG, WebP and HEIC and more. Accepted formats: JPG, PNG, WebP, AVIF, GIF, HEIC, TIFF. API: `POST /api/v1/jobs` with `"operation": "compress", "target_size": "20kb"` (paid plans). ## How to compress an image to 20 KB 1. **Add your images.** Drop JPG, PNG, WebP or HEIC files onto the compressor above, paste them, or click to browse. Mixed formats are fine. 2. **20 KB is preset.** Every file is compressed to land at or just under 20 KB. You can switch to another size, or a percentage to reduce by. 3. **Compress.** Click Compress. Each image keeps its format and, for most formats, never leaves your browser. 4. **Check and download.** Check the new sizes, 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 photo comes out around 430 × 290 px as a JPG, or 490 × 330 px as a WebP. Each file keeps its own format. - 20 KB here means 20,000 bytes, so the result also fits forms that count 1 KB as 1,024 bytes. - Everything except HEIC is compressed in your browser, so nothing is uploaded; HEIC runs in an isolated cloud sandbox and is deleted automatically. ## Which format keeps the most at 20 KB The same 20 KB holds a different amount of detail depending on the format. Rough size of a detailed 3:2 photo at good quality: | Format | A photo fits roughly | Good to know | | --- | --- | --- | | JPG | ≈ 430 × 290 px | Accepted almost everywhere; the safe pick for forms | | WebP | ≈ 490 × 330 px | More detail than JPG, if the site accepts WebP | | HEIC | ≈ 530 × 350 px | iPhone photos; many forms don't accept it | | AVIF | ≈ 550 × 370 px | Most efficient, least widely accepted | | PNG | ≈ 220 × 150 px | Best for logos, screenshots and signatures, not photos | _Rough guide for detailed photos. Each file keeps its own format; convert first if the destination needs a specific one._ ## 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. ## Photo won't fit in 20 KB? - **Signatures: high contrast, tight crop.** Sign on plain white paper with a dark pen, photograph or scan it in good light, and crop right up to the ink. A clean signature fits 20 KB with room to spare. - **Crop before you compress.** Every pixel you crop away is budget the subject keeps. For an ID photo, crop to head and shoulders first; for a document, crop to the page. - **Match the form's pixel size too.** Many photo fields also specify dimensions. Resize to those first: a smaller image fits 20 KB at noticeably higher quality. - **Photo saved as PNG? Make it a JPG.** At 20 KB, a photo stored as PNG only fits around 220 × 150 px; as a JPG it fits around 430 × 290 px. [Convert PNG to JPG](https://www.converterrr.com/png-to-jpg). ## Other image sizes - [Compress image to 50 KB](https://www.converterrr.com/compress-image-to-50kb): ID photos & form uploads - [Compress image to 100 KB](https://www.converterrr.com/compress-image-to-100kb): 100 KB upload limits ## 20 KB for a specific format [Compress JPG to 20 KB](https://www.converterrr.com/compress-jpg-to-20kb), [Compress PNG to 20 KB](https://www.converterrr.com/compress-png-to-20kb) ## Compress image to 20 KB: frequently asked questions ### How do I compress an image to 20 KB? Drop the image onto the compressor above. 20 KB is already set as the target (you can switch to another size or a percentage), so click Compress and download the result. ### Which image formats can I compress to 20 KB? JPG, PNG, WebP, AVIF, GIF, HEIC and TIFF. Each file keeps its own format. SVG is compressed losslessly, so it can't be aimed at a size. ### Which format keeps the most quality at 20 KB? WebP, HEIC and AVIF keep more detail than JPG at the same size, roughly 490 × 330 px for WebP against 430 × 290 px for JPG. But forms usually ask for JPG, so check what the site accepts. PNG is the worst choice for photos at small sizes. ### Will my image be resized to fit 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 photo comes out around 430 × 290 px as a JPG, or 490 × 330 px as a WebP. Each file keeps its own format. ### What if my image won't fit in 20 KB? Signatures: high contrast, tight crop: sign on plain white paper with a dark pen, photograph or scan it in good light, and crop right up to the ink. A clean signature fits 20 KB with room to spare. Crop before you compress: every pixel you crop away is budget the subject keeps. For an ID photo, crop to head and shoulders first; for a document, crop to the page. Match the form's pixel size too: many photo fields also specify dimensions. Resize to those first: a smaller image fits 20 KB at noticeably higher quality. ### 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. ### 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. ### Are my images uploaded? Everything except HEIC is compressed in your browser, so nothing is uploaded; HEIC runs in an isolated cloud sandbox and is deleted automatically.