Resize Image to 16 KB
16 KB is a power-of-two limit — 16,384 bytes — that shows up in older upload fields, device firmware and tight web budgets. This page gets your image under it. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 16 KB?
16 KB is a common upload limit for signatures, thumbnails and the small photo fields on online application forms. At that size a JPG photo can be about 310×230 pixels at medium quality.
About 310×230 px fits
At medium quality a detailed JPG photo of roughly 310×230 pixels lands under 16 KB; at high quality about 220×160.
Typical use
16 KB limits are common for signatures, thumbnails and the small photo fields on online application forms.
224× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 224×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 16 KB, quality is basic. Best for small ID photos and signatures.
Scans and documents
A scanned A4 page of about 380×530 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
16 KB is measured as 16,384 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
16 KB at a glance
| Limit in bytes | 16,384 bytes |
|---|---|
| Photo at high quality | about 220×160 px |
| Photo at medium quality | about 310×230 px |
| Photo at low quality | about 420×320 px |
| Scanned A4 document | about 380×530 px |
| Reduction from a 12 MP phone photo | about 224× |
| Output format | JPG (best for photos), WebP or PNG |
| Typical use | Signatures, thumbnails and the small photo fields on online application forms |
Compress an image to 16 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 16 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 16 KB.
New to image compression? Read the full compression guide.
Where a 16 KB limit comes from
Computers like powers of two. Many systems reserve storage in blocks of 16,384 bytes, so a "16 KB" limit is often exactly that. The tool uses the same 1 KB = 1024 bytes definition, so a file it makes under 16 KB is under 16,384 bytes.
Good candidates: small icons, UI placeholders, badges, simple logos and device display images. Flat colours and clean lines compress far better than photos.
Photos at 16 KB fit at about 280–300 pixels wide. For a larger photo, the tool reduces the dimensions automatically.
Neighbouring targets: 15 KB, 20 KB. Making a tiny icon instead? Try 32×32.
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
How many pixels fit in 16 KB?
For a detailed JPG photo, about 310×230 at medium quality or 420×320 at low quality. Simple graphics and scans can be much larger.
What quality will a 16 KB photo have?
Basic. Best for small ID photos and signatures. The tool keeps the dimensions where it can and lowers compression quality first, so faces and text stay readable.
Is 16 KB the same as 16,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 16 KB is 16,384 bytes. The tool uses the same count, so a file it marks as under 16 KB is accepted.
Should I use JPG or WebP for 16 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 16 KB?
Very large or detailed images may not reach 16 KB by quality alone. Resize it first (for example to 310 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.