Compress JPEG to 25 KB
25 KB is a common cap for passport-style photos on exam and admission portals. This page converts to JPEG and keeps the photo just under it. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 25 KB?
A 25 KB target is usually set for signatures, thumbnails and the small photo fields on online application forms. A JPG photo of around 390×290 pixels fits, with basic quality.
About 390×290 px fits
At medium quality a detailed JPG photo of roughly 390×290 pixels lands under 25 KB; at high quality about 270×200.
Typical use
25 KB limits are common for signatures, thumbnails and the small photo fields on online application forms.
143× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 143×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 25 KB, quality is basic. Best for small ID photos and signatures.
Scans and documents
A scanned A4 page of about 470×670 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
25 KB is measured as 25,600 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
25 KB at a glance
| Limit in bytes | 25,600 bytes |
|---|---|
| Photo at high quality | about 270×200 px |
| Photo at medium quality | about 390×290 px |
| Photo at low quality | about 530×400 px |
| Scanned A4 document | about 470×670 px |
| Reduction from a 12 MP phone photo | about 143× |
| Output format | JPG |
| Typical use | Signatures, thumbnails and the small photo fields on online application forms |
Compress an image to 25 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 25 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 25 KB.
New to image compression? Read the full compression guide.
A clear face in 25 KB
A head-and-shoulders photo around 370 pixels wide fits in 25 KB at good quality — plenty for the thumbnail an examiner sees.
Background matters most. A plain, evenly lit wall compresses very well. Patterned curtains and bookshelves eat into the budget and blur the face.
Resize to the form's size first. If the portal wants, say, 350×450, resize to exactly that, then compress here; the file will easily fit.
Minimum limits. Some forms need at least 10 or 20 KB. If your result is below, use a slightly larger target.
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
What pixel size fits a 25 KB photo?
Roughly 350–400 pixels wide for a portrait with a plain background. The tool shrinks it further automatically if needed.
How many pixels fit in 25 KB?
For a detailed JPG photo, about 390×290 at medium quality or 530×400 at low quality. Simple graphics and scans can be much larger.
What quality will a 25 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 25 KB the same as 25,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 25 KB is 25,600 bytes. The tool uses the same count, so a file it marks as under 25 KB is accepted.
Should I use JPG or WebP for 25 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 25 KB?
Very large or detailed images may not reach 25 KB by quality alone. Resize it first (for example to 390 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.