Add and position areas
Drag a box to move it. Drag a corner to resize it. Use arrow keys for precise movement.
ローカルで処理される
ビデオ内の領域をぼかす
Select one or more areas in your video to hide faces, license plates, screens, or sensitive details. Everything runs locally in your browser.
アップロードなしライブプレビューMP4、MOV、WebM、MKV、AVI・最大2GB
に良い
Faces, license plates, chat messages, screens, addresses, and other details that should stay private.
ローカルで処理される
アップロードなし
アップロードなし
ライブプレビュー
Drag a box to move it. Drag a corner to resize it. Use arrow keys for precise movement.
Drag a box to move it. Drag a corner to resize it. Use arrow keys for precise movement.
MP4
Exports an MP4 and keeps the original audio when the browser can encode it.
Exports an MP4 and keeps the original audio when the browser can encode it.
仕組み
必要なものを正確にぼかす
Cover every sensitive detail with a separate selection. The same areas and blur strength are applied to each frame in the exported video.
強さを調整する
コンテンツに対して、微妙または強いガウスぼかしを選択します。
Preview and export
Check every area, then render a new MP4 locally.
ビデオはこのデバイスに残ります
The browser decodes, blurs, and encodes every frame locally with MediaBunny and WebCodecs. Your source video is never uploaded.
FAQ
よくある質問
私のビデオはアップロードされますか?
No. The selected video is read and processed locally in your browser. It is not sent to MediaKit or any third-party server.
Can I blur more than one area?
Yes. Add up to six independent areas and position or resize each one before exporting.
動いている顔をぼかしてもいいですか？
The current version applies fixed areas to every frame. For a moving subject, use a larger area or export shorter segments with the video trimmer.
音声は保存されますか?
The original audio track is kept when the MP4 output and the browser codec support it.
Why is export slower for large videos?
Every frame must be decoded, composited, and re-encoded. High-resolution or long videos need more CPU time and memory; closing other heavy tabs can help.
Video blur guide
Blur faces and sensitive details in a video online
This free video blur tool lets you cover one or more fixed areas in a video and export a new MP4. Use it for faces, license plates, private messages, addresses, screens, or any detail that should not be visible. No account or upload is required.
Supported video formats
The picker accepts common phone, camera, screen-recording, and editing-app exports. Actual decoding depends on the video codec supported by your browser.
MP4
Best compatibility
Recommended for phones, messaging apps, social platforms, and most browsers.
MOV / M4V
Apple and camera exports
Useful for iPhone, iPad, and camera footage; output is converted to MP4.
WebM
Web-friendly video
A good choice for browser recordings and modern web projects.
MKV / AVI
Existing media files
Accepted up to 2 GB; support depends on the codecs inside the container.
How to blur a video
Protect a video in four steps. The source remains on your device throughout the workflow.
- 01
Add your video
Drop one MP4, MOV, WebM, MKV, AVI, or M4V file into the tool.
- 02
Place the blur areas
Move the selection over a sensitive detail. Add up to six areas and resize each one with its corner handles.
- 03
Preview and tune
Play the preview, use arrow keys for precise positioning, and adjust the blur strength.
- 04
Export and download
Render a new MP4 locally. Download it when the progress reaches 100%.
Common use cases
A fixed blur area works well when a sensitive detail stays roughly in the same place throughout a clip.
Privacy-safe screen recordings
Hide email addresses, chat messages, customer data, API keys, or notifications before sharing a tutorial.
Faces and license plates
Cover a face, vehicle plate, badge, or home number in footage for a quick privacy edit.
Product demos and reviews
Hide unreleased product details, account identifiers, or private dashboards in a recording.
Social and community posts
Prepare event footage, street scenes, or user-generated clips before posting publicly.
How private is the processing?
The selected File is passed to a local Web Worker. MediaBunny reads the container, WebCodecs decodes and encodes the video, and OffscreenCanvas composites the blur on each frame. The source and result stay in your browser; nothing is uploaded or stored on our servers. Remove the file or close the tab when you are finished to release memory.
FAQ
Frequently asked questions
Is this video blur tool free?
Yes. You can blur a video and download the MP4 result for free, without signing up.
Can I blur multiple areas?
Yes. Add up to six independent fixed areas. Select an area from the settings panel, then move or resize it in the preview.
Does it track a moving face automatically?
Not yet. The current workflow applies fixed areas to every frame. Use a larger box, shorter segments, or the video trimmer when the subject moves.
Which output format is created?
The tool exports MP4. The video is re-encoded so the blur can be applied frame by frame, while the original audio is kept when browser support allows it.
Why can an AVI or MKV file fail?
A container can hold many different codecs. Even when the extension is accepted, your browser may not have a decoder for the video or audio stream. MP4/H.264 is the most reliable input.
Does the blur permanently hide the information?
The downloaded MP4 contains the rendered blur. Still review the result before publishing, especially if the sensitive detail is large, high-contrast, or moves outside the selected area.
Why does a long video take time?
Blurring requires decoding, compositing, and encoding every frame. Resolution, duration, frame rate, and the number of areas all affect processing time.
Related video tools and tutorials
Trim a video first
Cut a long recording to the exact section that needs privacy editing.
Open tool or guideAdd a video watermark
Protect ownership or identify a private review copy with a text or logo mark.
Open tool or guideCompress the result
Reduce the MP4 size before sending it in a message or publishing it online.
Open tool or guideMP4 vs WebM guide
Compare compatibility, codecs, playback, and file size before you export.
Open tool or guide