Compress WebP to 20 KB
20 KB of WebP is enough for a crisp avatar or product tile. This page converts to WebP and compresses to just under 20 KB. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 20 KB?
20 KB is a common upload limit for signatures, thumbnails and the small photo fields on online application forms. At that size a WebP photo can be about 420×310 pixels at medium quality.
About 420×310 px fits
At medium quality a detailed WebP photo of roughly 420×310 pixels lands under 20 KB; at high quality about 290×220.
WebP stretches the limit
WebP packs about 30% more detail into 20 KB than JPG, but check that the site you upload to accepts .webp files.
179× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 179×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 20 KB, quality is fine for small display. Good for thumbnails, profile photos and forms.
Scans and documents
A scanned A4 page of about 500×710 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
20 KB is measured as 20,480 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
20 KB at a glance
| Limit in bytes | 20,480 bytes |
|---|---|
| Photo at high quality | about 290×220 px |
| Photo at medium quality | about 420×310 px |
| Photo at low quality | about 570×420 px |
| Scanned A4 document | about 500×710 px |
| Reduction from a 12 MP phone photo | about 179× |
| Output format | WebP |
| Typical use | Signatures, thumbnails and the small photo fields on online application forms |
Compress an image to 20 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 20 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a WebP under 20 KB.
New to image compression? Read the full compression guide.
Avatars and tiles in WebP
Avatars and product tiles shown at 100–200 pixels look sharp in a 20 KB WebP — often better than a 30 KB JPEG.
Transparent logos keep their see-through background in WebP, which PNG would also do at several times the size.
Pixel guide: about 350–400 pixels wide for a photo.
Using it on your site? Serve WebP directly — every current browser supports it — and keep a JPEG fallback only for very old systems.
Nearby: 10 KB, 50 KB. JPEG instead: JPEG to 20 KB.
Other file-size targets
Nearby limits — each one opens the compressor already set to it:
Compress by format
Guides and presets for each format:
Compress under a file size
Keeps your image’s format — pick the limit you need:
JPEG under a file size
Frequently asked questions
Does WebP keep transparency?
Yes. Transparent areas stay transparent, unlike JPEG which fills them with white.
How many pixels fit in 20 KB?
For a detailed WebP photo, about 420×310 at medium quality or 570×420 at low quality. Simple graphics and scans can be much larger.
What quality will a 20 KB photo have?
Fine for small display. Good for thumbnails, profile photos and forms. The tool keeps the dimensions where it can and lowers compression quality first, so faces and text stay readable.
Is 20 KB the same as 20,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 20 KB is 20,480 bytes. The tool uses the same count, so a file it marks as under 20 KB is accepted.
Should I use JPG or WebP for 20 KB?
JPG is accepted everywhere and is the safe choice for forms. WebP holds about 30% more detail at the same size, ideal for websites that support it.
Why is my file still over 20 KB?
Very large or detailed images may not reach 20 KB by quality alone. Resize it first (for example to 420 pixels wide) with the resizer, then compress again.
Are my images uploaded anywhere?
No. They are read and compressed by your own browser and never leave your device. You can disconnect from the internet once the page has loaded and it will still work.