Free tools › Images
Blur part of an image
Drag a box over what should not be seen; only that is blurred.
More free conversions, where you upload. The Fylane extension does the same work inside any upload form, on its own free share every day.Add to Chrome
How to blur part of an image
- Drop the image.
- Pick the box by eye and drag it over the part.
- Press Blur and download.
What happens to your file
The box you drew is cut out in the picture’s own pixels, a Gaussian blur whose radius is a per cent of the shorter side is applied to that piece alone, and it is put back exactly where it was. Nothing outside the box changes — the report says the pixels used.
A face at the heaviest setting is not recognisable, but a blur can be partly undone by a determined analyst; for a plate or a name, Pixelate part of an image at a coarse block removes more.
Questions
How do I blur just part of a picture?
Drop the image, drag the box over the part you want hidden, and press Blur. Everything outside the box is left exactly as it was, down to the pixel.
Can I blur a name, an address or a number?
You can, and for a screenshot you are posting casually it is fine. For anything that would matter if it were read — a bank account, a home address, a passport number — do not rely on blurring. Blur is a reversible-ish mathematical operation and short text is exactly the case where guessing works. Cover it with a solid shape, crop it out, or use PDF redaction, which deletes the content rather than smearing it.
Can I blur several faces at once?
One box per run today; run it again on the result for the next face. If the picture is full of people, the blur faces page finds them automatically instead.
Is blurring enough to hide someone?
For a social post, yes at the Heavy or Unrecognisable setting. For anything consequential, pixelate coarsely or crop them out of the frame entirely — the only certain method is that the pixels are not in the file.
Should I blur or pixelate?
Blur looks natural and keeps the shape of what is behind it. Pixelation reads clearly as deliberate censoring. Neither is secure, and at their strongest settings a coarse pixelation removes more information than a heavy blur does.
Does the rest of the photo change?
No. The box is cut out in the picture’s own pixels, blurred alone, and put back where it was. Nothing outside it is re-encoded or shifted.
Do it once, not on every form
A form that wants a square JPEG under 240 KB says so on the page. The Fylane extension reads that, fits your photo to it, and puts it in the field — without you working out what 240 KB looks like.
And it keeps the result. The next application that asks for a résumé, a cover letter and a photo fills all three from one tap, each one refitted to what that site accepts.
Your files stay in the browser, encrypted, on your machine. Nothing is uploaded to keep them and nothing is sent anywhere to fill a form.
Related tools
Do this in code
curl -X POST https://api.fylane.dev/v1/jobs \
-H "Authorization: Bearer $FYLANE_API_KEY" \
-H "Content-Type: application/json" \
-d '{
"file_id": "<file id>",
"operation": "image.effect",
"options": {
"effect": "blur",
"strength": 2,
"format": "same"
}
}'The same operation, image.effect — Four small edits: rounded corners (with transparency), a border, a pixelation, a blur — sizes as a per cent of the shorter side. Upload first with the quickstart; every option is on the operations page. 500 free credits a month, then $5 per thousand.