Compress Image to 20KB
Shrink any photo or signature to under 20 KB in one tap — made for exam, job and government forms. Works with JPG, PNG and WebP. Free, no sign-up.
or drag & drop · paste with Ctrl+V · up to 100 images at once
JPG, PNG, WebP, AVIF, GIF or BMP · up to 50 MB per image
- We never store your images
- Exact size in KB
- Batch + ZIP download
- Works on mobile
Simple process
How to compress an image to 20KB
Three steps. No software, no account.
Add your photo
Tap Choose images or drag & drop. 20 KB is already selected.
Set dimensions if asked
Form wants 3.5 × 4.5 cm or exact pixels? Choose Dimensions → Exact size and enter them.
Download under 20 KB
Your image is compressed to just under 20 KB. Save it, or get all images in one ZIP.
Why this compressor
Exact size, private and free
Most compressors only offer "low, medium, high" and leave you guessing. Here you pick the size in KB — and it fits.
🎯 Always under 20 KB
The best quality that still fits under 20 KB — no guessing and no trying again and again.
✍️ Clear signatures
Tick the signature option to turn grey paper white, so your signature stays sharp even at 10–20 KB.
🔒 100% private
We never store, keep or share your images. Free, no sign-up, no watermark.
Why forms ask for 20 KB — and how to get there
Many exam, job and government portals limit uploads to 20 KB — usually for the signature and sometimes for the photo. A phone photo is 2–5 MB, more than a hundred times bigger, so it has to shrink a lot.
This tool lowers the JPG quality step by step and, for big photos, also reduces the width and height until the file is just under 20 KB, keeping as much detail as possible. A 20 KB photo is usually around 400–800 pixels wide, which is enough for an ID-style photo or a signature.
If your form also asks for exact dimensions or DPI, choose Dimensions → Exact size and enter them in px, cm or mm — the photo is cropped to that shape and only the quality changes. Need a bigger limit? Try compress to 50KB or our image compressor with any size.
FAQ
Compress to 20KB — common questions
Choose your image — 20 KB is already selected — and download. It is compressed to just under 20 KB automatically.
Add the scanned signature, keep 20 KB and tick "Signature or document: make the paper background white". The paper turns white and the ink stays clear.
It stays clear enough for form uploads. Big photos are first made smaller in pixels, which keeps them sharp; going much lower, like 10 KB, makes them softer.
Yes. Choose Dimensions → Exact size, enter the width and height in px, cm or mm and the DPI. Only the quality changes to fit 20 KB.
Then it is kept exactly as it is, so it doesn't lose any quality.
Your file is kept under 20,000 bytes, so it passes whether the form counts 1 KB as 1000 or 1024 bytes.
Yes. It is free with no sign-up or watermark, and we never store, keep or share your images.
Yes. It works in Chrome, Safari and other mobile browsers and saves the image to Downloads or Files.
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