Free Video Transcoder
Trim · Convert (MP4 / WebM / GIF) · Adjust quality · Powered by ffmpeg.wasm
What does this tool do? Trim video clips, change formats, and adjust quality — all running locally
in your browser using WebAssembly. Your videos are never uploaded to any server.
Zero uploads — video processed via WebAssembly in your browser
- Trim: Set start and end times to cut your video
- Format: Convert between MP4, WebM, and GIF
- Quality: Adjust resolution and compression
- Download: Save the processed video directly
View Technical Specifications (For Developers)
- Engine:
ffmpeg.wasmv0.12+ running in a dedicated Web Worker for non-blocking UI - WASM Core: ~30MB initial download (cached by browser after first use)
- Output Formats: MP4 (H.264), WebM (VP8/VP9), GIF (palette-optimized)
- Trim Precision: Frame-accurate seeking via
-ss/-toflags - Memory: Files processed as
Uint8Arrayin browser memory via Emscripten FS - Limitations: Performance depends on device CPU. Large files (>500MB) may exhaust browser memory
Initializing Video Engine...
Loading ffmpeg.wasm (~30MB first time, cached after)
Fuel the Project
Zero-server video transcoding via WebAssembly. Free forever.