Blur Image Image
Soften an image, or blur it heavily to obscure something.
Blur Image is a free online tool that soften an image, or blur it heavily to obscure something. It accepts JPG, PNG, WEBP, GIF, BMP, AVIF and SVG — anything your browser can display. It produces pNG by default.. It runs entirely in your web browser using Canvas 2D, so files are processed on your own device and never uploaded to a server. There is no sign-up, no file size limit imposed by the site, no watermark and no paid tier.
- Price
- Free — no account, no quota, no watermark
- Category
- Image
- Where it runs
- In your browser, on your device
- Files uploaded
- None
- Input
- JPG, PNG, WEBP, GIF, BMP, AVIF and SVG
- Output
- PNG by default
- Technology
- Canvas 2D
- Settings
- 1
- Works offline
- Yes, after the first visit
About Blur Image
This applies a Gaussian blur through the canvas filter pipeline, which the browser hands to the GPU where it can. Radius is in pixels at the image's native resolution — so 10px on a 4000px photo is barely visible, while the same setting on a 400px thumbnail obliterates it. Scale the radius to the image, not to how it looks on your screen.
How to use it
- Choose an image, or drag one onto the drop zone.
- Set blur radius.
- Check the preview, then download. Your original file is never modified.
The one setting
| Setting | What it does | Default |
|---|---|---|
| Blur radius | Range 0–60px. | 6px |
Under the hood
| Runs on | Canvas 2D — does the pixel work |
| Accepts | JPG, PNG, WEBP, GIF, BMP, AVIF and SVG — anything your browser can display |
| Produces | PNG by default |
| Controls | Blur radius |
Questions
Is blurring enough to hide sensitive information?
Not reliably. Light blurring of text can sometimes be reversed, and faces stay recognizable at low radii. For genuine redaction use Pixelate Image at a large block size, or crop the region out entirely.
Why does the edge of my image look faded?
Gaussian blur samples beyond the image boundary, where there is nothing, so edges bleed toward transparent. Add a border first if you need clean edges, or crop a few pixels afterwards.
Which file types can I use?
JPG, PNG, WEBP, GIF, BMP, AVIF and SVG — anything your browser can display. Because decoding is handled by your browser rather than a conversion server, support tracks whatever your browser can already open.
Is there a file size limit?
No imposed limit — there is no server quota to hit. The real ceiling is your device's memory, since the whole file is held in RAM while it is processed. Desktop browsers cope with very large files; phones give up sooner.
What are the limits on blur radius?
It accepts 0 to 60px, starting at 6px.