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Subtitle converter

Convert caption files between SRT, WebVTT, YouTube SBV and plain text, in your browser.

  • Free, no account
  • Runs in your browser, nothing uploaded

Caption files up to 2 MB: SRT, WebVTT, YouTube SBV or ASS.

Runs in your browser. Nothing is uploaded.

Result

Open or paste a caption file to begin.

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00:20How it works

How to convert a subtitle file

  1. Open or paste your captionsThe tool reads SRT, WebVTT (.vtt), YouTube SBV and ASS/SSA files, up to 2 MB, or pasted text, and tells you how many captions it found.
  2. Choose the format to saveSRT, WebVTT, SBV or plain text. It starts on the one your file is not.
  3. Convert and downloadThe converted file shows on the page so you can check it first.
00:30The details

What goes in and what comes out

Reads
SRT, WebVTT, SBV, ASS/SSA
Writes
SRT, WebVTT, SBV, plain text
Limits
Caption files up to 2 MB: SRT, WebVTT, YouTube SBV or ASS.
Privacy
Caption files are read and changed inside your browser. They are not uploaded.
Cost
Free. No account, no watermark, no trial that runs out.
00:35Worth knowing

Getting a good result

Which format goes where

SRT is accepted almost everywhere: YouTube, LinkedIn, Facebook, Vimeo and every video editor. WebVTT is what the HTML video player on a website needs, and many course platforms ask for it. SBV is YouTube's own simple format. If you are not sure, SRT is the safe answer.

What changes between formats

The words and the times stay the same. SRT writes milliseconds after a comma (00:01:02,500) and numbers each caption; WebVTT uses a full stop (00:01:02.500) and starts with a WEBVTT line. WebVTT can also carry things SRT cannot: where on screen a caption sits, and who is speaking. Those are dropped on the way to SRT, and the tool tells you how many captions had them.

Speaker names and styling

A WebVTT speaker tag such as <v Maria> becomes "Maria: " at the start of the line, so the name is not lost, or you can remove it. Italics, bold and underline are kept, because SRT players understand them. Other tags are removed so they do not show up as literal text on screen.

00:40Questions

Subtitle converter: common questions

Does converting change the timing?

No. Every start and end time is carried over to the millisecond.

My file has odd characters where accents should be. Can this fix it?

Usually. Files saved in the older Windows-1252 or UTF-16 encodings are detected, read correctly and saved as UTF-8, which is what platforms expect.

Can it convert a subtitle track inside a video?

No. It works on separate caption files. To make captions from a recording, use the transcriber.

Is my file uploaded?

No. The conversion runs in your browser.

What people do next

All caption tools

Subtitle readability checker

Check a caption file for lines that are too long, too fast, too short or overlapping, and fix them.

Subtitle editor

Fix caption text and timing line by line, with your video playing alongside.

Add subtitles to video

Burn an SRT or WebVTT caption file into a video so the captions show on every platform.

Subtitle timing shifter

Move captions earlier or later, from one point onward, or stretch them to fix drift.

Guides for this job

All guides
Guide · Captions

SRT versus WebVTT: convert captions without losing timing

Convert the caption file, then inspect its cue times and text. A format conversion is not a spelling or synchronization repair.

Read the guide

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