Blur Faces in a Video Automatically
Anonymize a video in one pass. AI finds every face, tracks it as it moves and hides it with blur, pixelation or a black box. Free to try, nothing to install.
EchoWave's privacy tools are used by journalists, educators and creators worldwide
Automatic anonymization
Face blurring that keeps up with moving people
Blurring faces by hand means keyframing a shape over every person in every scene. EchoWave does it automatically: a face detector finds every face in the clip, and a two-pass tracker follows each one smoothly between frames so the mask never flickers or lags behind. Pick blur, pixelate or blackout, choose an oval that hugs the head or a classic censor box, and fine-tune coverage, softness and tracking. Need to hide a screen or license plate too? Pair it with the region blur tool, or drop emoji over faces for a lighter touch.
-
Every face
Detects and covers all faces in the frame automatically
-
3 styles
Soft blur, pixelate mosaic or solid blackout
-
Automatic
Face detection finds every person without manual masking
-
Motion tracking
Two-pass tracking keeps masks glued to moving faces
What you get
A complete face anonymizer, not just a blur filter
Detection, tracking and rendering are built in, with the controls professionals ask for.
-
Automatic Face Detection
A fast face detector scans every frame and finds every visible face, wide shots and small faces included. A minimum-size filter lets you ignore distant background faces when you only need foreground people covered.
-
Smooth Motion Tracking
A two-pass detect-then-track pipeline with look-ahead keeps the mask steady while people walk, turn and gesture, avoiding the flickering boxes single-pass tools produce. A tracking slider controls how tightly masks stick versus how smoothly they glide.
-
Blur, Pixelate or Blackout
Choose the anonymization style that fits the context: a soft blur, a chunky pixel mosaic, or a solid blackout bar for absolute certainty. Strength and pixel size are adjustable from 1 to 100.
-
Oval or Box Masks
Use an oval that hugs the head for a natural documentary look, or a rectangular region for the classic censor-bar style. Edge softness and coverage sliders control how far beyond the face the mask extends.
-
Private by Design
The blur is applied at full source quality when you export, and your footage stays private to your account.
-
Part of a Full Editor
Face blur is a per-clip effect inside the video editor, so you can trim the clip, censor audio and regions, add captions and export in one session.
How it works
How to blur faces in a video
Automatic anonymization in four steps.
-
Upload Your Video
Drag your clip into the EchoWave editor and select it on the timeline. Interviews, street footage, classroom recordings and bodycam-style clips all work.
-
Turn On Face Blur
Open the clip's effects and enable the face anonymizer. The AI detects every face and shows the masks in the live preview.
-
Pick a Style and Tune It
Choose blur, pixelate or blackout, oval or box, then adjust strength, coverage, edge softness and tracking until the masks sit exactly right.
-
Export the Anonymized Video
EchoWave bakes the face masks into the export at full quality. Faces stay hidden in the final file, not just in the preview.
Who uses it
Anywhere identity needs protecting
-
Journalists and Documentarians
Protect sources and bystanders in interviews and field footage while keeping the story watchable and the motion natural.
-
Teachers and Schools
Share classroom moments and school events publicly while keeping every student's face hidden, a common consent requirement.
-
HR, Legal and Compliance
Anonymize training footage, incident recordings and internal videos before wider distribution, in line with GDPR-style obligations.
-
Street and Travel Creators
Post vlogs filmed in public without exposing passers-by, especially in regions where publishing recognizable faces needs consent.
-
Researchers and Healthcare
De-identify study sessions, user tests and observational recordings before archiving or presenting them.
-
Real Estate and Security
Publish walkthroughs and camera footage with any captured faces pixelated, keeping listings and evidence shareable.
Blur every face in your video now
Automatic detection, smooth tracking, three anonymization styles. Free to start.
How creators use EchoWave in real projects
About the EchoWave team
EchoWave is a browser-based video and audio editor built by Lemon Vault LLC since 2018. The people who build the editor write these guides and test every step in the production app before publishing.
Face blur FAQ
How do I blur faces in a video automatically?
Upload your video to EchoWave, enable the face anonymizer on the clip, and the AI does the rest: it detects every face, tracks each one across frames and applies your chosen mask style. You review the result in the live preview and export. There is no manual keyframing or frame-by-frame masking involved.
How do I blur a face in a video online for free?
Upload the video to the EchoWave editor, select the clip and switch on Face blur in its details. Every face is detected and covered, and the mask follows each person as they move. Pick blur, pixelate or black out, check the preview, and export. It is free with a small badge on free exports.
Does the blur follow faces as people move?
Yes. EchoWave runs a two-pass pipeline: a detection pass finds faces, then a tracking pass with look-ahead smooths their paths so masks stay locked on while people walk, turn or lean. A tracking slider lets you trade responsiveness against smoothness for difficult footage.
Can I pixelate faces instead of blurring them?
Yes. Three styles are built in: blur, pixelate and blackout. Pixelation renders a chunky mosaic over each face, and the pixel size is adjustable. Blackout draws a solid censor region for cases where nothing may remain visible.
Is the face detection private?
Yes. Your footage stays private to your account: it is not shared, made public, or sent to anyone else for analysis. The blur is applied to the full-quality video when you export.
Can the blur be removed or reversed by someone else?
The mask is rendered into the exported video's pixels, so a viewer cannot toggle it off. For maximum protection choose blackout or strong pixelation: extremely light blur settings on high-resolution footage are theoretically easier to attack, which is why the strength ranges go well beyond what is recoverable.
Does it work on group shots and busy scenes?
Yes, the detector handles multiple faces per frame and the sensitivity slider helps in tricky lighting. Like any detector, extreme angles, heavy occlusion or very tiny faces are harder; the preview makes misses obvious, and you can raise sensitivity or lower the minimum face size to catch them. To skip small faces far in the background, raise the minimum face size so only the people in front are covered.
Is the face blur tool free?
Yes. Upload footage, run detection and preview the result for free, with no credit card. Free exports from the editor carry a small EchoWave badge and are capped at 720p; the Creator plan removes the badge and exports 1080p, and Pro and Ultra export 4K and 8K. For a single fixed area, the free blur video tool exports with no watermark.
What about blurring license plates, screens or documents?
Use the region blur tool for those: it lets you draw a blur, pixelate or blackout box over any area, feather its edges and restrict it to a time range. Many privacy edits combine both tools, automatic face blur plus a manual region or two.
Ready to anonymize
your footage?
Automatic face detection and tracking, right in your browser. Free to start.
Get Started →