Compress image to 300 KB.
Need an image under 300 KB for a form or portal upload? Drop it in and we hit the target in one click, entirely in your browser, so your image never leaves your device. No watermark, no signup, no upload limits.
Exact
Auto-tunes to your target
Private
Never leaves your device
Nothing stored
No upload at all
How it works
- 01
Add your image
Drop in a JPG, PNG or WebP, or click to browse. It stays on your device. Nothing is uploaded.
- 02
We hit 300 KB
Your browser re-encodes the image, automatically finding the quality (and, if needed, size) that lands at or under 300 KB.
- 03
Download it
Grab the 300 KB image instantly. No upload, no server, no signup.
How many pixels fit in 300 KB
300 KB is 307,200 bytes, 2,457,600 bits. Quality drops first; then the size steps to 85, 70, 55, 40, 25 percent.
| Picture | Full size | At 70 percent | At 40 percent |
|---|---|---|---|
| 600 x 600 ID photo | 6.83 | 13.93 | 42.67 |
| 1280 x 720 screenshot | 2.67 | 5.44 | 16.67 |
| 1920 x 1080 picture | 1.19 | 2.42 | 7.41 |
| 4032 x 3024 phone photo | 0.20 | 0.41 | 1.26 |
| Bits per pixel | Pixels | Square |
|---|---|---|
| 8 | 307,200 | 554 x 554 |
| 4 | 614,400 | 783 x 783 |
| 2 | 1,228,800 | 1,108 x 1,108 |
| 1 | 2,457,600 | 1,567 x 1,567 |
| 0.5 | 4,915,200 | 2,217 x 2,217 |
| 0.25 | 9,830,400 | 3,135 x 3,135 |
- Fewer bits per pixel, harder squeeze: a big phone photo shrinks before it reaches 300 KB.
Common questions
Why compress to 300 KB?+
300 KB is a frequent upload cap on forms, portals and content systems, small enough to load quickly while keeping a photo looking good. This lands you under it in one click.
Is my image uploaded anywhere?+
No. This runs entirely in your browser using your device's own processor. Your image never leaves your computer or phone.
What if it can't reach 300 KB?+
For very large images we gently reduce the dimensions too. If it still can't fit while staying usable, we give you the smallest version and tell you, never a broken file.
Which formats work?+
JPG, PNG and WebP. The result is a JPG (or WebP) since those compress to a precise size.
Is there a limit or watermark?+
No watermark, no signup, free, and since it's all in your browser, no upload size limits either.
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