Professional FFmpeg power without installing anything
FFmpeg is the engine behind most professional video software. AnyShift runs a WebAssembly build of FFmpeg directly in your browser tab, giving you reliable conversions between MP4, MOV, MKV, AVI, WEBM, GIF, MP3, WAV, M4A and FLAC — with sensible presets for quality and file size, and full control when you need it.
Subtitles and transcripts with on-device AI
Our transcription tools use OpenAI's open-source Whisper speech-recognition model, running locally through WebAssembly/WebGPU. Generate SRT or VTT subtitles, plain-text transcripts with timestamps, or burn captions straight into your video. Accuracy is excellent for clear English speech and supports dozens of other languages.
Tips for the best results
- Keep the tab open while processing — closing it stops the job.
- For long videos, desktop Chrome or Edge is fastest.
- Use Video Compressor before emailing; a 1080p clip usually shrinks 60–80% with little visible loss.
- Trim first, then convert — shorter clips process faster.
Frequently asked questions
Is there a maximum video size?
Files up to about 2 GB work in most desktop browsers; mobile browsers handle smaller files. Processing is limited only by your device memory.
Do you add a watermark?
Never. Your output is exactly your media, converted.
Can I download YouTube or TikTok videos here?
No. Our tools work on files you own or are authorised to use. That keeps the site within platform rules and copyright law.