Resize Image to 5 KB
5 KB limits usually apply to signatures and thumbnail photos on online forms. This page brings your file under 5 KB, keeping the format and as much quality as fits. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 5 KB?
A 5 KB target is usually set for signatures, thumbnails and the small photo fields on online application forms. A JPG photo of around 170×130 pixels fits, with basic quality.
About 170×130 px fits
At medium quality a detailed JPG photo of roughly 170×130 pixels lands under 5 KB; at high quality about 120×90.
Typical use
5 KB limits are common for signatures, thumbnails and the small photo fields on online application forms.
717× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 717×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 5 KB, quality is basic. Best for small ID photos and signatures.
Scans and documents
A scanned A4 page of about 210×300 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
5 KB is measured as 5,120 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
5 KB at a glance
| Limit in bytes | 5,120 bytes |
|---|---|
| Photo at high quality | about 120×90 px |
| Photo at medium quality | about 170×130 px |
| Photo at low quality | about 230×170 px |
| Scanned A4 document | about 210×300 px |
| Reduction from a 12 MP phone photo | about 717× |
| 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 5 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 5 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 5 KB.
New to image compression? Read the full compression guide.
Signatures and thumbnails at 5 KB
Typical for signatures. Forms that cap uploads at a few KB usually want a scanned signature. Crop it tightly around the ink, on white paper, and it fits in 5 KB easily.
Photos need small pixels. A face photo at 5 KB is around 120–150 pixels wide. If the form names pixel dimensions, set them first, then compress here.
Check the minimum too. Some forms set a range (for example 4–5 KB). Aim just below the maximum so you clear both ends.
Nearby sizes
Other limits and sizes people often need:
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
What pixel size fits in 5 KB?
A simple signature at around 300×100 pixels, or a face photo around 120–150 pixels wide at moderate quality.
How many pixels fit in 5 KB?
For a detailed JPG photo, about 170×130 at medium quality or 230×170 at low quality. Simple graphics and scans can be much larger.
What quality will a 5 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 5 KB the same as 5,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 5 KB is 5,120 bytes. The tool uses the same count, so a file it marks as under 5 KB is accepted.
Should I use JPG or WebP for 5 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 5 KB?
Very large or detailed images may not reach 5 KB by quality alone. Resize it first (for example to 170 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.