Private browser tool

Subtitle Reading Speed Checker

Check SRT or VTT reading speed locally and download a cue-by-cue CSV report.

No uploadNo accountFree to use

✓ Runs locally in your browser

🔒 Subtitle content never leaves your browser.

Private by default

Useful conversion without giving up your file.

Subtitle text remains in your browser and is not sent to Voysum.

Text-based conversion happens immediately without a server queue.

Save the converted or edited subtitle file directly to your device.

Common questions

How local browser processing works and what to expect.

Is my subtitle uploaded?

No. The file is read and processed only inside your browser tab.

Do I need an account?

No. This subtitle utility is completely free to use.

Keep working

Check SRT timing, overlaps, empty cues, and long lines locally.

Open, edit, and download SRT or VTT subtitles locally in your browser.

Reflow long subtitle lines while preserving timing.

Need the words too?

Voysum can transcribe the converted recording and create subtitle files.