Compress JPEG to 300 KB
Get a JPG under 300 KB — ideal for web pages, product listings and portals that only accept JPEG. Every image is saved as JPEG and compressed to the best quality that fits. Everything runs in your browser — nothing is uploaded. Need different dimensions instead? Resize or convert.
Why compress to 300 KB?
A 300 KB target is usually set for website images, email and marketplace listings. A JPG photo of around 1360×1020 pixels fits, with good quality.
About 1360×1020 px fits
At medium quality a detailed JPG photo of roughly 1360×1020 pixels lands under 300 KB; at high quality about 950×710.
Typical use
300 KB limits are common for website images, email and marketplace listings.
12× smaller than a phone photo
A 12 MP phone photo is around 3–4 MB, so it must shrink about 12×. The tool lowers quality first and resizes only if needed.
Quality to expect
At 300 KB, quality is good. Plenty for web pages, email and on-screen viewing.
Scans and documents
A scanned A4 page of about 1640×2330 pixels usually fits, because text pages compress far better than photos.
Exact limit, checked
300 KB is measured as 307,200 bytes (1 KB = 1,024 bytes), the way most upload forms count it, so the file is never just over.
300 KB at a glance
| Limit in bytes | 307,200 bytes |
|---|---|
| Photo at high quality | about 950×710 px |
| Photo at medium quality | about 1360×1020 px |
| Photo at low quality | about 1840×1380 px |
| Scanned A4 document | about 1640×2330 px |
| Reduction from a 12 MP phone photo | about 12× |
| Output format | JPG |
| Typical use | Website images, email and marketplace listings |
Compress an image to 300 KB in 3 steps
- Add your image — JPG, PNG, WebP or a phone photo.
- The target is already set to 300 KB. Leave “Remove EXIF metadata” ticked to save extra bytes.
- Click Compress and download a JPG under 300 KB.
New to image compression? Read the full compression guide.
JPEG at 300 KB for the web
300 KB is the sweet spot for large photos on a website: a JPG around 1600–2000 pixels wide looks crisp on laptops and phones and still loads quickly.
Mixed batches. Drop in a mix of PNG screenshots, WebP downloads and
camera JPGs — everything comes out as JPEG under 300 KB, with consistent
file names ending in -min.jpg.
CMS uploads. WordPress and most shop platforms create smaller copies for thumbnails automatically, so uploading one 300 KB original is enough.
Screenshots with text can look fuzzy as JPEG. If sharp text matters more than the format, use resize image to 300 KB, which keeps PNG.
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 a 300 KB JPEG good enough for a website?
Yes for most large photos. It keeps them sharp at typical display sizes while loading quickly on mobile.
How many pixels fit in 300 KB?
For a detailed JPG photo, about 1360×1020 at medium quality or 1840×1380 at low quality. Simple graphics and scans can be much larger.
What quality will a 300 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 300 KB the same as 300,000 bytes?
Not quite. Most forms count 1 KB as 1,024 bytes, so 300 KB is 307,200 bytes. The tool uses the same count, so a file it marks as under 300 KB is accepted.
Should I use JPG or WebP for 300 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 300 KB?
Very large or detailed images may not reach 300 KB by quality alone. Resize it first (for example to 1360 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.