Free subtitle tools
Genuinely free utilities that run entirely in your browser. No signup, no upload, no watermark.
SRT and VTT carry the same subtitle cues in slightly different syntax. SRT uses commas before the milliseconds and is accepted by nearly every editor and player; VTT adds a WEBVTT header and is what HTML5 video players and most web platforms require. The converters below translate between the two instantly, entirely in your browser, so your file never leaves your machine.
The two checkers cover the other half of subtitle work: the character counter tests every caption line against the 42-character readability guideline broadcasters use, and the words-per-minute calculator tells you whether speech is too fast for comfortable captions. Use them forever; we make our living from transcription, not converters.
Universal subtitles into the web-native format, instant and client-side.
VTT → SRT ConverterWeb captions into the format editors and players accept everywhere.
Subtitle Character CounterCheck every caption line against the 42-character guideline.
Words Per Minute CalculatorMeasure speech pace from any transcript and recording length.
Frequently asked questions
Do these tools upload my subtitle file?
No. Conversion runs entirely in your browser with JavaScript. Nothing is sent to a server, which is also why the converters keep working if you lose connection after the page loads.
What is the difference between SRT and VTT?
They carry the same cues in slightly different syntax. SRT numbers each cue and uses commas before the milliseconds; VTT starts with a WEBVTT header, uses dots before the milliseconds, and supports styling. SRT is accepted by nearly every editor and player, while VTT is what HTML5 video players and most web platforms require.
Are these really free, with no catch?
Yes. There is no signup, no watermark and no usage cap. We make our living from transcription, not from converters, so these utilities stay free.
Starting from a recording instead of a subtitle file? Generate SRT/VTT from any audio or video or browse all transcription tools.