filetity

IMAGE -> BLURRED · Local tool

Blur image

Apply an adjustable blur to an image.

Last updated

  1. 01 / Your device

    the file stays here

  2. 02 / Browser memory

    the work runs locally

  3. 03 / Back to you

    saved on this device

When you would use this

Situations, not settings.

A face or a plate in the background
Blur the whole image when the detail you are hiding is spread across it rather than in one box.
A background for text
A blurred photo behind a heading keeps the mood and stops the detail competing with the words.
Showing a layout without showing the content
Useful for a screenshot in a deck where the shape matters and the data does not.

How it works / no cloud

A conversion engine, not an upload form.

filetity runs a three-pass box blur over the pixels in browser memory, which is the standard cheap approximation of a Gaussian blur and is indistinguishable from one at these radii. Each pass is separable, a horizontal sweep then a vertical one, which is what keeps a large photo instant instead of hanging the tab.

  • Offline ready
  • Installable app
  • No file limit queue

Straight answers

No accordion. Nothing hidden.

Is it free?
Yes, with no watermark and no page limit.
Does it need an account?
No. There is no account system.
Is my file processed on my device?
Yes. The file is read by your browser and never uploaded. There is no server to send it to.
What formats are supported?
JPG, PNG and WebP in. The same format out, so nothing else about the file changes.
What are the limits?
Radius from 1 to 40 pixels, applied to the whole image. There is no selective or partial blur here.
Does it work on mobile?
Yes, on any modern mobile browser. Large files are limited by the memory the phone gives the browser.
Does it work offline?
Yes, after you have used it once. Your browser keeps what the tool needs, so it then works with no network connection.
Can I blur only part of the image, like a face?
Not on this page. It blurs the whole image evenly. To obscure one region, crop it out, blur it, and place it back in an editor, or use the pixelate tool, which is the more common choice for censoring.
Is a blurred face safe to publish?
Treat it as a soft measure rather than a guarantee. A light blur can sometimes be partially reversed because the underlying detail is still present in a smeared form. For anything that genuinely matters, cover the area with a solid block instead.
Is this a real Gaussian blur?
It is three box blur passes, which mathematically converges on a Gaussian and looks identical at these radii. The difference is invisible and it runs several times faster.
Do the edges of the picture go dark?
No. At the border the blur reads the edge pixel again rather than reading black from outside the image, so the edge blurs against itself and the picture keeps its colour right up to the frame.
What radius should I use?
The slider runs from 1 to 40 pixels and starts at 6, which softens a photo without hiding what is in it. Larger numbers hide more. The radius is in pixels of the image, so a large photo needs a larger number for the same look.

Keep working locally

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