Compress Image to 20KB
Selected
Original
Compressed
Add images to see compression results
Target size (KB)
A built-in 5% safety margin is applied (e.g. a 50KB target compresses to ≈47KB), so uploads are never rejected for being just over the limit.
Quality 5–100：
Could not reach target size
Lower the quality further or resize the image, then try again.
Transparent image — kept as PNG
Compress images to 20KB or less (tiny files)
Exam registration systems often cap photo uploads at a strict 20KB, and e-signatures at just a few KB. Staying recognizable at such extreme sizes requires a precise balance between resolution and compression. This tool binary-searches that balance automatically, squeezing photos under 20KB — processed locally, no upload, unlimited.
Common scenarios with a 20KB limit
| Scenario | Typical limit | Required format |
|---|---|---|
| Exam registration photos | Photo 20KB | JPG |
| E-signature images | 2–10KB | PNG/JPG |
| Tiny icons for online forms | Under 20KB | PNG |
| Web page load optimization | 20–50KB | WebP/JPG |
How to Compress an Image to a Specific Size
Upload your image
Drag & drop an image or click to select. You can upload several images at once.
Set the target size
Pick a preset (20 KB to 1 MB) or type an exact size in KB. The tool auto-adjusts quality and resolution to hit it.
Compress
Click Compress. Everything runs locally in your browser — your files never leave your device.
Download
Download the compressed images one by one, or grab everything as a ZIP.
Why choose this tool
Extreme compression engine
Automatically balances quality and resolution so even a large photo squeezed to 20KB keeps recognizable contours instead of turning into a blur.
All formats supported
JPG, PNG, WebP, AVIF, BMP, GIF and iPhone HEIC all compress; output as JPG, PNG or WebP.
Batch + ZIP
Exam season often means hundreds of photos at once. Batch process them all and download as a single ZIP.
100% local
Images with personal details (names, ID photos) never leave your device — ideal for sensitive use cases.
Frequently asked questions
Is 20KB really enough?
It depends on the purpose. Exam systems usually only need facial comparison or manual review, where a 20KB JPG suffices; for stricter recognition, choose a larger target (50/100KB). For avatars and thumbnails, 20KB is plenty.
Will the photo be blurry at 20KB?
Our algorithm prioritizes key areas like faces: it scales to a suitable resolution first, then encodes at the best quality for that size — far better than blindly dropping quality.
What resolution works best for 20KB?
Aim for a source around 300-800px on the long side before uploading. Anything much larger gets downscaled aggressively, and anything tiny may fail to reach useful detail. The tool finds the best balance automatically.
Does it support HEIC?
Yes. HEIC/HEIF photos from an iPhone upload and compress directly, no format conversion needed.
Can I compare the result before downloading?
Yes. After compression you can preview each file with its exact size, and re-run with a different target if 20KB looks too aggressive for a particular image.
Ready to beat the 20KB limit?
Upload your photo, pick 20KB, and get a compliant file in seconds. Fully local, free, unlimited.