Compress JPEG to 350 KB
350 KB leaves room for a high-quality photo about 1400 pixels wide. This page saves JPEG and targets just under 350 KB. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 350 KB?
350 KB is a common upload limit for website images, email and marketplace listings. At that size a JPG photo can be about 1470×1100 pixels at medium quality.
About 1470×1100 px fits
At medium quality a detailed JPG photo of roughly 1470×1100 pixels lands under 350 KB; at high quality about 1030×770.
Typical use
350 KB limits are common for website images, email and marketplace listings.
10× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 10×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 350 KB, quality is good. Plenty for web pages, email and on-screen viewing.
Scans and documents
A scanned A4 page of about 1770×2510 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
350 KB is measured as 358,400 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
350 KB at a glance
| Limit in bytes | 358,400 bytes |
|---|---|
| Photo at high quality | about 1030×770 px |
| Photo at medium quality | about 1470×1100 px |
| Photo at low quality | about 1990×1490 px |
| Scanned A4 document | about 1770×2510 px |
| Reduction from a 12 MP phone photo | about 10× |
| Output format | JPG |
| Typical use | Website images, email and marketplace listings |
Compress an image to 350 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 350 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 350 KB.
New to image compression? Read the full compression guide.
Portfolio images at 350 KB
Pixel guide: roughly 1380 pixels wide at high quality — good for portfolio grids and lightboxes on laptops.
Protect your work. Add a subtle mark with the watermark tool first, then compress; watermarking after compression can leave blocky edges around the text.
Colour. JPEG output here is sRGB, the colour space browsers expect, so colours look the same on most screens.
Keep the full-size original for prints and future edits.
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
Should I watermark before or after compressing?
Before. Compressing last keeps the watermark edges clean.
How many pixels fit in 350 KB?
For a detailed JPG photo, about 1470×1100 at medium quality or 1990×1490 at low quality. Simple graphics and scans can be much larger.
What quality will a 350 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 350 KB the same as 350,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 350 KB is 358,400 bytes. The tool uses the same count, so a file it marks as under 350 KB is accepted.
Should I use JPG or WebP for 350 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 350 KB?
Very large or detailed images may not reach 350 KB by quality alone. Resize it first (for example to 1470 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.