Try the Subtitle Editor & Generator
Free online subtitle editor. Open, edit, retime and export .srt or .vtt files, or auto-generate subtitles from an audio/video file using your browser's.
- Free to use
- No signup
- Nothing to install
- Runs in your browser
A generated cue reads “there going to the store” at 00:01:12 → correct it to “they're going to the store” and nudge the end time from 00:01:14 to 00:01:15 so it matches the pause in the audio.Open the Subtitle Editor & Generator
Illustration. Open the tool for the real thing.
What is the Subtitle Editor & Generator?
Open an existing .srt or .vtt subtitle file and every cue appears as an editable row: start time, end time and the caption text. Fix a typo, retime a cue by typing an exact timestamp, add a missing line, delete an extra one, or shift every cue by a fixed number of seconds when the whole file has drifted out of sync with the video. When you are done, export as .srt for most players and editing software, or .vtt for the web's <track> element and HTML5 video.
If you do not have a subtitle file yet, the Generate tab can build one from scratch. Choose an audio or video file, click Start, and your browser's built-in speech recognition listens while the file plays, creating a timestamped caption for each recognised phrase using the file's own playback position. The result drops straight into the editor so you can fix any misheard words and adjust timing before exporting. Everything — parsing, editing, timing and export — happens locally in your browser tab; the speech recognition itself is handled by your browser's own engine, and no file is uploaded to a server.
3 steps to your result
Open the tool and follow along. Nothing to install.
What you get
Open, edit text and timing, add or delete cues.
Nudge every cue forward or back by a set number of seconds.
Speech-to-text captioning timed to real playback position.
Download as .srt or .vtt whenever you are ready.
AZRS tools are free to open and use.
It opens in your browser, so there is nothing to download.
Used for
Pick one to see how it fits.
Video creators and educators
Add accurate captions to lessons, tutorials and social clips.
Try it freePodcasters repurposing audio as video
Generate a first-pass transcript to turn into burned-in captions.
Try it freeTranslators and localisation teams
Fix timing on subtitle files before or after translation.
Try it freeHow it compares
A plain look at this tool next to the usual alternative.
| This utility | Desktop software | |
|---|---|---|
| Install | Nothing to install | Usually an app or program to install |
| Account | No signup | Depends on the product |
| Cost | Free to use | Free or paid, depends on the product |
| Where it runs | In your browser tab | On your computer |
Questions people ask
What is the difference between SRT and VTT?
SRT is the older, simpler subtitle format supported by most video players and editors. VTT (WebVTT) is the web standard used by HTML5 video and supports some extra styling; this tool converts between them.
How does the auto-generate feature actually work?
It plays your file and feeds the audio to your browser's built-in Web Speech API while recording the video's playback position, so each recognised phrase gets a timestamp that matches where it happened in the file.
Is my audio or video uploaded anywhere?
No. The file is played locally and speech recognition is handled by your browser's own engine; nothing is sent to our servers.
Which browsers support the Generate tab?
Chrome and Edge on desktop have the most reliable Web Speech API support. Safari and Firefox may not support it.
Can I shift only part of the subtitles?
The bulk shift button moves every cue; for a single cue, edit its start and end time directly in that row.
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Try the Subtitle Editor & Generator now
Edit, retime and export SRT/VTT subtitles, or auto-generate them from audio/video. Free to use.
Try it free