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Blur Faces in Video

Blur faces in a video in your browser: faces are found and followed through the video on your device, hidden with a blur, pixels or a black box, and boxes you draw cover the rest.

Know your workflow

Supported files and how to use.

Check supported input/output details and follow the tool steps before exporting.

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Technical specs and decision signals

Use these specs to confirm browser fit, privacy boundaries, and export behavior before you blur faces in a video.

Cost

Free, with no signup.

Security

Detection and blurring run in your browser; the video is not uploaded to ToolBuddy.

Input

MP4, MOV, WebM, or MKV video, up to 2 GB on desktop and 250 MB on mobile.

Output

The same container where possible, re-encoded at high quality, with the sound copied.

Styles

Blur, pixelate or a black box, round or square.

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How to use

Check supported input/output details and follow the tool steps before exporting.

01

Select or drop a video, or try the sample.

02

Find faces, then untick any you want to keep visible.

03

Add boxes by hand for anything else, and choose blur, pixels or a black box.

04

Save the video, then download it or open it in another tool.

Guide

Learn, decide, and apply.

Understand how to blur faces in a video in the browser, why it matters in repeat workflows, and when to use this tool with confidence.

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Faces followed, not just found

  • Runs on your device, so private videos are never uploaded.
  • Follows each face through the video, not just one frame.
  • Boxes drawn by hand cover what detection misses.
  • Blur, pixelate or black out, as round or square areas.
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Check, add, then save

  • Hide bystanders in a street video before posting it.
  • Anonymise people in a video for a report.
  • Cover a licence plate or a screen with a drawn box.
  • Pixelate faces in a classroom or event clip.
About

About Blur Faces in Video

Blur faces in a video in the browserFaces followed, not just foundCheck, add, then save

Found and followed

Faces are detected on frames sampled through the video and joined into one track per person, so the blur moves with them between samples.

You stay in control

Untick a face to leave it visible, draw boxes for what was missed, and see the result in the preview before saving.

Local and honest

Detection runs on your device and can miss faces, so the preview shows exactly what will be saved.

FAQ

Common questions.

Have more questions? Reach out via our contact page and we will respond within 24 hours.

Is my video uploaded?

No. Faces are found and hidden in your browser, and the video never leaves your device.

How are faces found?

With your browser's face detector where it has one, otherwise with a small detector that ships with ToolBuddy, on frames taken four times a second.

Will every face be found?

Not always. Small, turned or covered faces can be missed, so check the preview and draw boxes for anything left.

Do drawn boxes move?

No, a drawn box stays in place for the whole video, which suits fixed things like a sign or a screen.

Which formats are saved?

The video's own container where possible, re-encoded at high quality; the sound is copied.

Use cases

Popular workflows.

See real workflows where this tool fits naturally, then jump straight into the matching guide.

View all tools

Blur Face

Continue from Blur Faces in Video into blur face for the next step in the workflow.

Open workflow

Video Watermark

Continue from Blur Faces in Video into video watermark for the next step in the workflow.

Open workflow

Crop Video

Continue from Blur Faces in Video into crop video for the next step in the workflow.

Open workflow

Guides

Learn with practical workflow guides.

Read intent-focused guides, then jump straight into the live tool workflow.

View all guides

Blur Faces in Video use cases

Practical workflows and common jobs you can handle with Blur Faces in Video.

Open guide

Related

Explore more tools.

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Blur Face

Image

Detect and blur faces locally before sharing photos or screenshots.

Video Watermark

Video

Add a text or logo watermark to video locally, in a corner, dragged, or tiled, with opacity, size, and rotation, a time range with fades, and an optional moving mark that is harder to remove.

Crop Video

Video

Crop a video in your browser by dragging a box or choosing 1:1, 9:16, 16:9, 4:5 or 4:3, then save just that part as MP4, with no upload and no watermark.

Video Compressor

Video

Compress MP4, MOV, WebM, or MKV video locally to a target size or a quality level, with size presets, HEVC or AV1 where your browser supports them, and resolution, frame-rate, and audio options.