Resize Image to 850 KB
Many sites recompress anything large you upload, often badly. Sending a well-compressed 850 KB file yourself means less gets changed after upload. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 850 KB?
A 850 KB target is usually set for blog images, large web graphics and attachments. A JPG photo of around 2290×1720 pixels fits, with very good quality.
About 2290×1720 px fits
At medium quality a detailed JPG photo of roughly 2290×1720 pixels lands under 850 KB; at high quality about 1600×1200.
Typical use
850 KB limits are common for blog images, large web graphics and attachments.
4.2× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 4.2×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 850 KB, quality is very good. There is room for a sharp, full-screen photo.
Scans and documents
A scanned A4 page of about 2770×3920 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
850 KB is measured as 870,400 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
850 KB at a glance
| Limit in bytes | 870,400 bytes |
|---|---|
| Photo at high quality | about 1600×1200 px |
| Photo at medium quality | about 2290×1720 px |
| Photo at low quality | about 3100×2330 px |
| Scanned A4 document | about 2770×3920 px |
| Reduction from a 12 MP phone photo | about 4.2× |
| Output format | JPG (best for photos), WebP or PNG |
| Typical use | Blog images, large web graphics and attachments |
Compress an image to 850 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 850 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 850 KB.
New to image compression? Read the full compression guide.
Beating a site's own compression
Why photos look worse after posting. Social and community sites shrink big uploads with fast, aggressive settings. A file that is already close to the size they want is often left alone or changed less.
Match their size first. Resize to the width the site displays — for example 1080×1350 for Instagram portrait posts — then compress.
Sharpen lightly in your editor before compressing; it survives the site's processing better than a soft original.
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
Why do my photos look blurry after posting online?
The site recompresses large uploads. Resize to the size it displays and compress yourself first so it changes less.
How many pixels fit in 850 KB?
For a detailed JPG photo, about 2290×1720 at medium quality or 3100×2330 at low quality. Simple graphics and scans can be much larger.
What quality will a 850 KB photo have?
Very good. There is room for a sharp, full-screen photo. The tool keeps the dimensions where it can and lowers compression quality first, so faces and text stay readable.
Is 850 KB the same as 850,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 850 KB is 870,400 bytes. The tool uses the same count, so a file it marks as under 850 KB is accepted.
Should I use JPG or WebP for 850 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 850 KB?
Very large or detailed images may not reach 850 KB by quality alone. Resize it first (for example to 2290 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.