A free tool that compresses any image to 20 KB or less in your browser, at the best quality that fits, and scores every file.
5.0(1 rating)Drop any images to fit them under 20 KB, at the best quality that fits. It all happens in this browser.
Your images
Settings
PNG stays PNG, JPG stays JPG.
Compress
Add an image to compress.
Everything happens in this browser, so your images never leave your computer. PNGs are compressed with libimagequant and OxiPNG, JPGs with Google's JPEGli, and every result is scored with SSIMULACRA 2, the quality metric from Cloudinary and JPEG XL.
This free tool compresses an image to 20 KB or less, in your browser, at the best quality that fits.
JPG, PNG, WebP and HEIC all work, up to 50 at once. Nothing is uploaded.
Some application portals, exam forms and ID uploads accept photos only under 20 KB.
Here's what compressing to 20 KB means, how the tool fits a picture, and what I measured.
What is compressing an image to 20 KB?
Compressing an image to 20 KB means saving it again until the file is 20 KB or less.
The tool tries the highest quality first, and steps down until the file fits.
If the quality would drop too far, it makes the picture smaller in pixels instead. A smaller picture at a good quality looks better than a big one full of blocks.
What I measured
I fitted a 29-megapixel photo of a golden retriever, 7.9 MB as a JPG, to every size the tool offers:
- File
- 20 KB
- Pixels
- 498 x 332
- Score
- 74.2
- File
- 48 KB
- Pixels
- 664 x 442
- Score
- 74.9
- File
- 97 KB
- Pixels
- 995 x 664
- Score
- 75.5
- File
- 191 KB
- Pixels
- 1659 x 1106
- Score
- 66.8
- File
- 478 KB
- Pixels
- 2190 x 1460
- Score
- 67.1
- File
- 961 KB
- Pixels
- 2654 x 1770
- Score
- 69.4
- File
- 1.9 MB
- Pixels
- 3318 x 2212
- Score
- 71.7
At 20 KB it came out 20 KB, 498 x 332 pixels, at a score of 74.2.
The score compares the result with the original photo at the same size, so it measures the compression, not the smaller size.
This photo is hard to squeeze: it's full of fine fur and camera noise. Cleaner photos, like screenshots and portraits against a plain wall, score higher at the same size.
How I tested
I tested on September 29, 2026, with this page's own engines, and scored each result with ssimulacra2, the reference program that ships with JPEG XL (libjxl 0.11.2), against the original photo made the same size:
| Score | What it means |
|---|---|
| 90 and up | Looks identical: no difference even flicking between them at 100% |
| 80 to 90 | Same side by side at 100% |
| 70 to 80 | High quality: hard to notice without comparing |
| 50 to 70 | Medium quality: you can see it up close |
| Under 50 | Visible loss |
Who is the 20 KB image compressor for?
It's for anyone facing a size limit:
- Image resizer – anyone who needs an exact size in pixels too
- Signature background remover – applicants whose forms ask for a signature image
- HEIC to JPG – iPhone owners whose form won't take HEIC
- JPG compressor – anyone compressing photos without a set size
It works in your browser, and the new file leaves out hidden details like the camera and where a photo was taken.
Other sizes
Here are the other sizes, and the compressor without a limit:
- Compress image to 50 KB – for job and application portals
- Compress image to 100 KB – for forms and profile photos
- Compress image to 200 KB – for fast web pages
- Compress image to 1 MB – for email and listings
- Compress image to 2 MB – for upload limits
- Image compressor – the best quality at any size
Every size keeps the picture as clean as the limit allows.
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Compress Image to 20 KB FAQs
Questions about the compress image to 20 KB? Here's what to know.
It means saving an image again until its file is 20 KB or less.
This tool finds the best quality that fits.
Make it smaller in pixels first, then lower the quality until it fits.
This tool does both for you, and scores the result.
Drop your image here, and click Compress: the size target is already set to 20 KB.
The tool finds the best quality that fits.
The score on each file tells you: my 29-megapixel test photo scored 74.2 at 20 KB.
To keep quality up, the tool makes the picture smaller in pixels before it lowers the quality too far.
A big photo can't fit 20 KB at full size without looking blocky.
The tool makes it smaller in pixels first, and the result says by how much.
Keep the format for photos in JPG, or pick WebP for websites.
A PNG screenshot often fits best as a PNG.
Yes, it's free, with no account and no limit on files.
It runs in your browser, so it costs nothing to run.
No, the 20 KB image compressor works in your browser.
Your images never leave your computer.
Yes, drop up to 50 files at once, 50 megapixels each.
Download them one by one, or all together as one ZIP.
I did.
I'm Navid Moazzez, and the 20 KB image compressor is one of my free tools on navid.me.
Read more about me.
Navid Moazzez
AI business strategist & AI OS builder
Navid Moazzez helps creators and founders master AI and build their own AI Operating System (AI OS) to automate their business and life.
Navid.me is reader-supported. When you buy through links on this site, I may earn an affiliate commission. Learn more.
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