SRT Converter

Convert caption files, and fix their timing

SRT to WebVTT and back, SBV or plain text, one file or many, and captions moved back into time: a shift, a two-point sync or a new frame rate.

Free. Works in any browser, on a phone or a computer. What you put here stays on your device.

About SRT Converter

Reads SRT, WebVTT and SubViewer (.sbv) files, in UTF-8, UTF-16 or the Windows-1252 that older Windows tools save, and saves UTF-8, which YouTube requires for SRT and SBV.
Writes SRT, WebVTT, SBV, or plain text with or without each line's time.
Keeps italics, bold and underline where the format has them; positions, colours and speaker tags are dropped. On YouTube, that styling shows from WebVTT only: YouTube reads no styling in SRT or SBV.
Converts many files at once and saves them as one ZIP.

Every caption early or late by the same amount: a shift.
Right at the start but further off by the end: a two-point sync, from when the first and the last line should start.
Made for a copy of the video at another speed (25 fps against 23.976): a frame rate change.

Drop one caption file or many, or paste the captions.
Choose what to convert to, and a timing fix if they need one.
Download each file, or all of them as one ZIP, and upload them to YouTube Studio.

How do I convert SRT to VTT?: Drop the SRT file, choose WebVTT and download. The words and times stay as they are; the WebVTT header and its escapes are added for you.
Why are my captions out of sync?: If every caption is off by the same amount, shift them. If they drift further off as the video goes on, use a two-point sync. If they were made for a different frame rate, change it.
My accents show as question marks. Can it fix that?: Usually, yes. Files saved by older Windows tools are often Windows-1252; the converter reads them that way and saves UTF-8.
Are my files uploaded?: No. They are read and converted in your browser.