Compress JPEG to 256 KB
256 KB is exactly a quarter of a megabyte and a common cap in form builders, CRM uploads and embedded systems. This page gets a JPEG just under it. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 256 KB?
A 256 KB target is usually set for website images, email and marketplace listings. A JPG photo of around 1260×940 pixels fits, with good quality.
About 1260×940 px fits
At medium quality a detailed JPG photo of roughly 1260×940 pixels lands under 256 KB; at high quality about 880×660.
Typical use
256 KB limits are common for website images, email and marketplace listings.
14× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 14×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 256 KB, quality is good. Plenty for web pages, email and on-screen viewing.
Scans and documents
A scanned A4 page of about 1520×2150 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
256 KB is measured as 262,144 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
256 KB at a glance
| Limit in bytes | 262,144 bytes |
|---|---|
| Photo at high quality | about 880×660 px |
| Photo at medium quality | about 1260×940 px |
| Photo at low quality | about 1700×1280 px |
| Scanned A4 document | about 1520×2150 px |
| Reduction from a 12 MP phone photo | about 14× |
| Output format | JPG |
| Typical use | Website images, email and marketplace listings |
Compress an image to 256 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 256 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 256 KB.
New to image compression? Read the full compression guide.
A quarter-megabyte limit
256 KB = 0.25 MB when 1 MB is 1024 KB. You'll see it in avatar uploads, CRM attachment fields and device firmware.
Pixel guide: about 1180 pixels wide for a photo — sharp for most on-screen uses.
Avatars. A 256 KB avatar is far bigger than needed; resize to the display size first (for example 400×400) and the file will be a fraction of the limit.
Uncertain counting? 250 KB leaves a margin.
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
Is 256 KB the same as 0.25 MB?
Yes, when 1 MB is counted as 1024 KB — which is how this tool and most upload forms count.
How many pixels fit in 256 KB?
For a detailed JPG photo, about 1260×940 at medium quality or 1700×1280 at low quality. Simple graphics and scans can be much larger.
What quality will a 256 KB photo have?
Good. Plenty for web pages, email and on-screen viewing. The tool keeps the dimensions where it can and lowers compression quality first, so faces and text stay readable.
Is 256 KB the same as 256,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 256 KB is 262,144 bytes. The tool uses the same count, so a file it marks as under 256 KB is accepted.
Should I use JPG or WebP for 256 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 256 KB?
Very large or detailed images may not reach 256 KB by quality alone. Resize it first (for example to 1260 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.