Resize an image to 30 KB
Resize a photo to under 30 KB online for free, in your browser with no signup. In our tests four of five photos fitted at the default 1600 pixels, at quality 5 to 7. A busy city scene needed 1361 pixels or less, and the editor's width suggestions got it there in two steps.
Jump to the toolYour workspace FILE SIZE · PREVIEW · DOWNLOADPrivate by default
Finds the highest quality that fits the target at these dimensions.
Processed on your deviceNo watermark. No signup.
What to expect at this size
These are measured figures, not estimates. Five photographs were run through this page's own engine and the results written down.
The range is what varies between an easy photograph and a hard one: a flower against a blurred background compresses far better than a street full of signage.
- File size produced
- 27.1 KB to 38.1 KB
- Quality it settles on
- 5 to 7
- Photos that hit the target
- 4 of 5
- Photographs used
- 5
- Measured on
The default width cannot always reach this target.
At the full width the quality search runs out of room before the file is small enough, so reduce the width and the target comes within reach.
Every photograph tested fitted once the long edge was reduced to 1361 px.
Why do forms ask for this size?
30 KB is a common ceiling for a photo on an application form or an older upload portal. It is enough for a clear passport style photo, but not for a large, detailed one.
At this size the pixel dimensions decide the result. Crop to the face or subject first, then let the quality search finish.
What is the difference between resizing and compression?
The main difference between resizing and compression is the measurement you change. Resizing changes width and height in pixels. Compression reduces file size in bytes.
A photo can have the correct dimensions and still exceed an upload limit, so check both requirements.
If you need both, set the dimensions first and then adjust quality or the file size target. Work from the original and download once to avoid repeatedly recompressing a saved JPEG.
PNG has no quality setting, so a PNG over the target is reduced to fewer colours instead, keeping as many as fit. The meter shows the count. Screenshots and graphics usually survive this with no visible change. A photograph needs many colours, so bands of flat colour can appear at a small target, and JPEG is then the better format.
What happens to your photo?
Your selected photo is processed in your browser, without an image upload to a server. The page may download code and codecs needed for editing.
Save your result before closing the tab; unsaved edits are kept in memory rather than in an online account.
Common questions
What pixel size fits in 30 KB?
Most photos fit at 1600 pixels on the longest side. Four of our five test photos did, between 27,739 and 30,313 bytes.
The busy city scene stayed at 39,005 bytes even at the lowest quality and needed 1361 pixels or less. The editor's first suggestion, 1363 pixels, left it 13 bytes over; its second, 1308, fitted at 28,675 bytes.
My form says 30 KB. Is that 30,000 or 30,720 bytes?
This tool counts 1 KB as 1,024 bytes, so its 30 KB target is 30,720 bytes. A form may count 30,000 instead.
Two of our four photos that fitted came out at 30,238 and 30,313 bytes, which would fail that stricter reading. Type 29 in the exact size box to aim for 29,696 bytes, under the limit either way.
Why does my photo look blotchy at 30 KB?
Because the quality search had to go very low, to 5 to 7 on our test photos at 1600 pixels. JPEG gets there by discarding fine detail.
A smaller width keeps more detail per pixel. If your form gives pixel dimensions, use those and the quality can stay higher.
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