Resize Image to 300 KB
300 KB comfortably holds a full-width web photo at high quality. This page opens the compressor with a 300 KB target for blog, product and portfolio images. 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 (best for photos), WebP or PNG |
| 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.
Web photos at 300 KB
For a website, a good rule is to keep large photos around 200–300 KB. At 300 KB a JPG around 1600–2000 pixels wide looks sharp even on high-DPI laptop screens.
Hero and header images are the biggest on the page and the first to load — keeping them at 300 KB or less makes a noticeable difference to how fast the page appears.
Portfolios. Photographers want quality; 300 KB is a fair balance for gallery images. Add a subtle mark with the watermark tool before uploading.
Keep the original. Compress a copy — once quality is thrown away it cannot be recovered.
JPEG-only upload? Compress JPEG to 300 KB. Other targets: 240 KB, 500 KB.
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 size should website images be?
For large photos, around 200–300 KB at 1600–2000 pixels wide is a good balance of sharpness and speed. Smaller images such as thumbnails should be far lighter.
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.