Blur Image Online
Blur any area of an image online and download the result with local browser processing.
Same local editor as the homepage. This page is a deep link for one job, not a separate upload service.
Blur
Softer cover. Raise the strength until text is unreadable.
Pixelate
Mosaic blocks for faces and photos. Larger blocks hide more.
Black Box
Solid cover for names, IDs, and anything that must not be readable.
How to use
How do you redact this image locally?
Load the image in this browser, draw over each sensitive region, and export a PNG. The canvas edit does not upload the file. Paste a screenshot with Ctrl+V or Command-V, or drop a JPG, PNG, or WebP. Undo fixes a box without changing the original on your device.
- 1
Click "Upload your image" or drag and drop a JPG, PNG, or WebP file onto the page.
- 2
Make sure "Blur" is selected in the toolbar (it is the default mode).
- 3
Click and drag on the image to draw a box over the area you want to blur.
- 4
Repeat for any other areas. Use "Undo" to remove the last selection if needed.
- 5
Click "Export redacted PNG" to save the blurred result to your device.
You can also paste a screenshot with Ctrl+V or ⌘V. Undo and Redo fix a box without changing the original file.
Why use this tool
Why does this stay in the browser?
This page is for images that already contain private material. Blur, pixelate, and black box run in your browser, so the file is not sent away to be cleaned. Use a black box for secrets that must not stay readable. Use blur or pixelate only after you have checked that the cover is enough.
Every time you share a screenshot, there is a good chance it contains more private information than you realize: email addresses in notifications, names in conversation threads, internal URLs, account numbers, or customer data visible in a dashboard.
Blurring sensitive parts of an image before sharing is one of the simplest privacy habits you can build. It takes under a minute and prevents accidental data exposure to colleagues, clients, or strangers on social media.
This tool runs entirely in your browser. Your image never leaves your device, is never uploaded to a server, and is never stored anywhere. You can blur as many areas as you need, undo mistakes instantly, and download a clean image in seconds.
Questions
What should you know before you export?
The image is processed locally, and export writes a new PNG. Blur is not the same cover as a black box. Paste works with Ctrl+V or Command-V. If your question is about a specific leak, such as a password, a face, or a sidebar, use the guides linked below before you send the file.
How do I blur part of an image online?
Upload your image, drag a box over the area you want to blur, then export the result. The blur is applied instantly with no account required.
Is my image uploaded to a server when I blur it?
No. The tool uses your browser's built-in Canvas API to process the image entirely on your device. Nothing is sent to a server.
What image formats can I blur?
You can upload JPG, PNG, and WebP images. The result is downloaded as a PNG file.
Can I blur multiple parts of the same image?
Yes. Each drag adds a new blurred region. There is no limit to how many areas you can blur in a single session.
What if I blur the wrong area?
Click Undo to remove the last blurred area, or Redo to put it back. Clear all removes every box, and Undo restores them. Neither action affects the original file.
Can I choose how strong the blur is?
Yes. Use the blur strength slider before you draw. A higher strength hides text and detail more completely, and each box keeps the strength it was drawn with. Pixelate and Black Box are in the same editor if you want a different cover.
What is the difference between Blur, Pixelate, and Black Box?
Blur creates a smooth frosted-glass effect. Pixelate replaces the area with large colored blocks. Black Box covers the area with solid black and is the strongest visual redaction.
Can I blur an image on my phone?
Yes. The tool works on modern mobile browsers. Open the site on your phone, upload an image from your gallery, and drag over the area to blur.
Does blurring affect the overall image quality?
Only the selected area is affected. The rest of the image remains at full quality. The downloaded PNG is lossless.
What is the maximum image size I can use?
There is no hard limit. The tool can handle any image your browser can load, though very large images may take a moment to process depending on your device.
Related workflows
Which related tool should you open next?
Every tool on this site is the same local editor with a different starting note. Open a related page when the job is narrower, such as faces, screenshots, or solid black text. You do not upload the image to a second service to switch jobs.
Guides
Which guide matches this job?
Read the guide that matches the mistake you are about to make. Text secrets usually need a black box, not a light blur. Faces, plates, and sidebars need their own pass. Local editing matters most when the file should not be uploaded in order to hide it.
Tool network
Where are the other free tools?
The list below is that same editor under different job names. Pick the name that matches what you need to hide. Processing stays in the browser on every page here, and none of these links is a separate upload form.