Blur Video Area Pro

About Blur Video Area Pro with AI

Advanced in-browser video blur and redaction tool with automatic AI face detection, motion tracking, and multiple blur effects. Easily blur faces, redact license plates, or hide PII and sensitive information for GDPR/privacy compliance. Features real-time preview, keyframe animation, and pixelate/mosaic effects, then exports a universal MP4 (H.264, yuv420p + faststart) or WebM (VP9/VP8) file. Everything runs locally with WebAssembly - your video is never uploaded to any server.

How does AI face detection work?

Our AI uses TensorFlow.js and face-api.js to detect faces in your video frames. Simply pause at any frame and click 'Detect Faces' - the AI will identify all visible faces and allow you to create blur regions automatically. The AI models run entirely in your browser for privacy.

What is Auto-Track feature?

Auto-Track uses AI to follow faces as they move through your video. It automatically creates keyframes at regular intervals, tracking face positions over time. This saves hours of manual keyframe creation for videos with moving subjects.

What blur effects are available?

Three blur types: Box Blur (fastest processing), Gaussian Blur (smoother, higher quality), and Pixelate/Mosaic (creates a blocky censored effect). All effects can be adjusted with the intensity slider from 1-50.

How do I add multiple blur regions?

You can either use AI detection to automatically create regions for detected faces, or click 'Add Region' to manually create blur areas. Each region has independent position, size, time range, and keyframes.

What is real-time blur preview?

When enabled, you'll see the actual blur effect applied on the video canvas as you edit. This helps you visualize exactly how the final video will look. Disable it on slower devices for better editing performance.

How does motion tracking with keyframes work?

Motion tracking allows blur regions to follow moving objects. Seek to different times in your video, adjust the blur position, and add keyframes. The tool smoothly interpolates between keyframes to create fluid movement.

Can AI detect faces in any video?

AI works best with clear, front-facing faces. It may struggle with: very small faces, extreme angles, heavy occlusion, or very dark/bright frames. If AI doesn't detect a face, use manual mode to draw the blur region yourself.

How long does processing take?

Processing time depends on video length, resolution, and number of blur regions. A 30-second 720p video typically takes 1-3 minutes. Use 'Ultrafast' or 'Superfast' encoding for quicker results.

Is my video private and secure?

Yes! All processing (including AI face detection) happens entirely in your browser using WebAssembly. Your video is never uploaded to any server. The AI models are downloaded once and cached locally.

What video formats are supported?

Input: MP4, WebM, MOV, AVI, MKV, M4V, WMV, FLV, 3GP, MPEG (max 200MB). Output: MP4 (H.264) or WebM (VP9/VP8). MP4 is recommended for best compatibility across devices and platforms.

Should I export MP4 or WebM?

Choose MP4 (H.264) when you need a file that plays everywhere - Safari, iOS, QuickTime, hardware players and most editors. The tool forces yuv420p and adds +faststart so the MP4 streams and plays universally. Choose WebM VP9 for the best quality-per-megabyte on the web, or WebM VP8 for faster, broadly compatible encodes. VP9/VP8 now use the correct 0-63 CRF scale and threaded encoding, so 'Best Quality' finishes in a reasonable time instead of hanging.

Is the blur permanent and irreversible?

Yes. The blur, pixelate or mosaic is baked into the exported pixels during re-encoding - the original pixels under the region are destroyed and cannot be recovered from the output file. This is true redaction, suitable for GDPR/PII compliance, court evidence and publishing, unlike a CSS or overlay 'cover' that can be peeled off.

Is the audio kept in the blurred video?

Yes. Audio is preserved and re-encoded alongside the video: AAC for MP4, Opus for WebM VP9, and Vorbis for WebM VP8. Only the selected regions of the picture are blurred; the soundtrack is left intact.

What is the maximum video size and length?

Files up to 200MB are supported. Because everything runs in your browser via WebAssembly with a limited memory heap, very long or high-resolution clips with many blur regions process more slowly. For best results keep clips short and use Superfast/Ultrafast encoding for large files.