Video tools

Guide to trimming, compressing, converting, GIFs and recording video in the browser.

All guides

Getting started: What OpenFile is, how to use your first tool, install it as an app and work offline.
How OpenFile works: The zero-upload privacy architecture, the processing engines and first-use model downloads.
Keyboard shortcuts: Global, command palette, docs and Sketch board keyboard shortcuts.
PDF tools: Guide to every PDF tool: merge, split, compress, sign, protect, OCR and more.
Convert: Guide to converting between PDF, Word, Excel, PowerPoint, Markdown, HTML and images.
Image tools: Guide to compressing, resizing, converting, background removal, upscaling and editing images.
Video tools: Guide to trimming, compressing, converting, GIFs and recording video in the browser.
Audio tools: Guide to editing, converting, recording and transcribing audio on-device.
Developer tools: Guide to JSON, JWT, hashes, regex, QR codes, cURL conversion and other developer utilities.
Text & data tools: Guide to diffing, counting, case conversion, Markdown and text cleanup tools.
Design tools: Guide to colors, gradients, CSS, favicons, SVG and the Sketch whiteboard.
Workspace pipelines: Chain steps into reusable recipes and batch-process hundreds of images or PDFs.
Sketch board: The infinite whiteboard: tools, boards, sharing, presenting, exporting and shortcuts.
Favorites, history & settings: How favorites, recent tools, activity history and settings are stored locally in IndexedDB.
Self-hosting: Deploy OpenFile to Vercel, GitHub Pages, any static host or Docker with nginx.
API reference: The optional Vercel serverless routes: /api/health, /api/fetch-page and /api/meta.
Browser support: Which browsers and platform features each group of tools needs.
FAQ: Answers to common questions about privacy, limits, offline use and troubleshooting.
Contributing & adding a tool: Set up the project, follow the tool conventions and add a new tool to the registry.
Changelog: Release notes for every OpenFile version.
Install on every device: Install OpenFile as a web app, a desktop app for Windows, macOS and Linux, an Android APK or on iPhone.
Using tools: Drop zones, batches, page ranges, presets, history, undo and where your downloads go.
Themes and accessibility: Black, dark, light and system themes, accent colors, fonts, density, reduced motion and keyboard use.
Offline and PWA: How the service worker caches the app, engines and models, how updates work and how to clear data.
Open with and share target: Open files from your system with OpenFile and send files to it from the share sheet.
Local AI: Which AI models run on your device, their sizes, first-run downloads, WebGPU or CPU, cancelling and privacy.
Privacy and security: No uploads, how to verify it yourself in the DevTools network tab, headers and what is stored locally.
Formats supported: A searchable matrix of every input and output format, generated from the tool registry.
Full tools reference: Every tool with its description, formats and link, generated from the registry. Filter and search.
Troubleshooting: Large files, memory, browser support, Safari quirks, unsigned app warnings and quick fixes.
Developer guide: Architecture, adding a tool, batch files, tests, builds, Pages and Vercel base paths and releasing the apps.
Roadmap: What has shipped and what comes next, generated from the project roadmap.
Data: Guide to every Data tool: csv, excel, json, sqlite, parquet, maps and gps.
AI: Guide to every AI tool: on-device ai for images, text and documents.
3D: Guide to every 3D tool: view and convert glb, gltf, obj, stl, ply and more.
Archives: Guide to every Archives tool: open and create zip, 7z, tar, gz and rar.
eBooks: Guide to every eBooks tool: read and convert epub, mobi, fb2 and comics.
Fonts: Guide to every Fonts tool: convert, inspect and subset ttf, otf, woff.
CAD: Guide to every CAD tool: view and convert dxf and other drawings.
Subtitles: Guide to every Subtitles tool: convert, sync and edit srt, vtt, ass.
Security & Privacy: Guide to every Security & Privacy tool: scrub metadata, lock files, hide messages, redact personal data.
Maps & GPS: Guide to every Maps & GPS tool: gpx elevation, splits, heatmaps, privacy zones and location codes.
Office & Sheets: Guide to every Office & Sheets tool: merge, split, compare and pivot spreadsheets, clean word files.
Science & Education: Guide to every Science & Education tool: equations, graphs, chemistry, matrices, logic and primes.
Creator Studio: Guide to every Creator Studio tool: audiograms, vertical video, carousels, word clouds and chapters.

Tools

Video Trimmer: Trim and cut clips with a visual timeline, no re-upload.
Video Compressor: Compress videos with quality presets and target resolution.
Video Converter: Convert between MP4, WEBM, MOV, MKV and AVI.
Video to GIF: Turn a clip into an optimized animated GIF.
Extract Audio: Pull the soundtrack from a video as MP3, WAV or AAC.
Mute Video: Remove the audio track from any video.
Video Speed: Speed up or slow down a video from 0.25× to 4×.
Merge Videos: Join multiple clips into one video.
Video Upscaler: Upscale video to 1080p, 1440p or 4K with Lanczos + sharpening.
Video to Frames: Grab frames as images at any interval.
Screen Recorder: Record screen + webcam bubble with mic and system audio.
Webcam Recorder: Record webcam video with mirror and countdown.
Crop Video: Crop a video visually with aspect presets for Reels, Shorts and TikTok (9:16), square (1:1) and portrait (4:5).
Rotate & Flip Video: Rotate a video 90, 180 or 270 degrees or mirror it, with an instant no-quality-loss option for MP4 and MOV.
Reverse Video: Play a video backwards with reversed sound, or make a forward-and-back boomerang loop.
Resize Video: Change resolution or aspect ratio with platform presets, filling the space with a blurred copy or a colour.
Loop Video: Repeat a clip a number of times or up to an exact length. Repeating is lossless and fast.
Watermark Video: Add a text or logo watermark to a video with position, size and opacity controls.
Add Text & Stickers to Video: Timed text, emoji stickers, freehand drawing and a progress bar on any video.
Add Audio to Video: Add music, replace the soundtrack, mix it with the original or add a second track, with a sync offset.
Picture in Picture & Background: Overlay a second video or image, place a video on a coloured or image background, or add a slow zoom.
Split Screen Video: Show 2 to 4 videos side by side, stacked or in a grid, with gap colour and sound choice.
Video Filters & Colour: Brightness, contrast, saturation, warmth, sharpen and unblur, blur, vignette, denoise and LUT colour grading.
Blur Part of a Video: Blur, pixelate or black out faces, plates and screens in fixed areas, for the whole video or a time range.
Stabilize Video: Reduce camera shake in handheld clips with an optional zoom to hide moving edges.
Frame Rate, Slow Motion & Time-lapse: Change frame rate, interpolate smooth motion, make slow motion, time-lapse or a stop-motion look.
Freeze Frame: Hold any moment of a video for a few seconds, then let it carry on.
Remove Logo from Video: Fill in a fixed logo, watermark or date stamp from the surrounding pixels.
Add Subtitles to Video: Burn SRT, VTT or ASS subtitles into a video with your style, or add them as a switchable track in MP4 or MKV.
Images to Video: Make a slideshow video from photos with music, crossfades, a slow Ken Burns zoom and per-slide timing.
PDF to Video: Turn the pages of a PDF or exported slide deck into a timed MP4 slideshow with music and transitions.
Green Screen Video: Remove a green or blue screen and replace it with a colour, image, another video or transparency.
Repair Video: Fix videos that will not play or seek by rebuilding the container and index, or re-encoding readable frames.
Media Info: See codecs, bitrate, resolution, frame rate, HDR, channels, chapters and tags of any video or audio file.
Teleprompter: Scroll your script over the camera preview while you record, with speed, size and mirror controls.
Webcam, Mic & Speaker Test: Check your camera, microphone level and left and right speakers before a call or recording.