Video Face Redactor
Blur faces in a video
Detect faces, hide them with mosaic or blur, and export MP4. Adjust masks manually as needed.
Web tools that run entirely in your browser
Free practical tools for everyday tasks involving PDFs, images, video, data inspection, and more.
Files and tool inputs are not sent to our servers.
No sign-upLocal processingOpen source
Search results
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IN THE BROWSER
Your browser can do this, too.
Presentation Remote
Control slides from your phone
Open a PPTX or PDF on your computer, then connect your phone by QR code to control the slides.
OneFile Album
Give your photos a home in one file
Bundle photos and their viewer into one HTML file. Share the whole album, ready to open in a browser.
FEATURED
Featured tools
Merge and split PDFs
PDF OrganizerReorder PDFs, images and PowerPoint slides, then save all or selected pages as PDF.
Video Contact Sheet
Turn representative video frames into one overview image.
Pass-the-Phone Vote
Pass one phone around for a private in-person vote and final reveal.
Image Counter
Manually count with point and rectangle markers that preserve location.
Reverse Clip
Create reversed or ping-pong MP4 clips, with optional reverse audio.
GUIDES
Guides
How to automatically sort photos into categories with local AI
Classify mixed photos and screenshots by content, review the results, and download the originals grouped by category.
Read guideHow to combine a saved web page into one HTML file for offline use
Check a saved HTML page and its local resources, then package a supported static page into a single HTML file.
Read guideHow to Count Characters Without Spaces and Check Writing Length
Compare character counts with and without spaces, track a writing target, and review long sentences and repeated terms.
Read guideWHAT’S NEW
What’s new
Updated five tools: Pause & Tell, Music Cue Pad, DuckDB Explorer, Lossless Video Cutter, and PPTX Version Control
Pause & Tell v1.0.1 fixes drawing history and save messages and adds a video file picker on phones. Music Cue Pad v1.0.3 improves playback controls, backup/restore safety, and mobile layout. DuckDB Explorer v1.0.5 prevents stale analysis results when changing databases and improves read-only SQL checks. Lossless Video Cutter v1.0.6 fixes missing video/audio near cut boundaries and retains multiple audio and compatible subtitle tracks. PPTX Version Control v1.1.8 upgrades slide rendering for visual comparison and blocks external media loads.
Five tool releases: Video Speed Changer, Arrow Viewer, SQLite Explorer, Same Spot Diff, Video Review Notes
Video Speed Changer v1.1.2 prevents stale conversion results and improves video loading and switching. Arrow Viewer v1.0.3 fixes duplicate field names, dictionaries and timestamps. SQLite Explorer v1.1.3 improves database replacement, CSV exports and large integer handling, and adds a WAL-mode warning. Same Spot Diff v1.0.7 fixes self-extracting startup, camera handling, pinch gestures and ignored-region boundaries. Video Review Notes v1.0.5 improves portrait video annotations, autosaving and file selection on phones.
Updated Device Check and Smart Image Sorter
Device Check v1.0.6 improves how camera, microphone, speaker and other test results are verified, and fixes interrupted sessions, page restoration and mobile display. Smart Image Sorter v1.0.6 prevents stale results after cancelled sorting and improves autosave, recovery, cross-tab conflict detection and memory use during ZIP creation.
About Browser Kitty
Browser Kitty makes browser-based tools for organizing PDFs and editing images and video. They are free to use, with no account required.