Are my videos uploaded to a server?
No. Conversion, compression, subtitles, and transcription all run inside your browser using built-in media APIs, so files never leave your device.
Subtitle Editor
About this tool
Subtitle Editor
Edit SRT and VTT subtitles in your browser: retime cues, shift timing, preview on video, and convert formats.
Features
- Cue Editor controls.
- Timing Shift controls.
- Format Convert controls.
- Video Preview controls.
Frequently asked questions
Why does converting take about as long as the video?
The browser re-encodes by playing the video through a capture pipeline in real time. A two-minute clip takes roughly two minutes to process.
Which browsers work best?
Chrome and Edge support every feature, including MP4 output and live transcription. Firefox and Safari support WebM output and the subtitle editor.