SRT to VTT Converter: What Changes in the File

Converting SRT to VTT for the sample cues changes two things: a WEBVTT header line is added at the top, and the decimal separator in each time moves from a comma to a period. The page shows the same 2 cues in SRT and then in WebVTT, so you can compare the files line by line.

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Files up to 2 GB · export to TXT, MD, DOCX, PDF, SRT and VTT · speaker labels and timestamps · about 30 languages

Key facts

The text, the cue numbers and the arrow between the start and end times stay as they are in the converted output.
A WebVTT file must begin with the word WEBVTT on its first line, followed by a blank line, and SRT has no such line.
The page uses a fixed two-cue sample with no paste box, so apply the rule to your own file.
Cue numbers are optional in WebVTT, where they are called cue identifiers, so keeping them is allowed.
A real file may need more than these two changes, so check the result in a player.

Calculator

Default example: the same two cues in SRT and in WebVTT.

1
00:00:01,000 --> 00:00:03,500
Let's start the meeting.

2
00:00:04,000 --> 00:00:07,200
First, we'll review last week's results.

WEBVTT

1
00:00:01.000 --> 00:00:03.500
Let's start the meeting.

2
00:00:04.000 --> 00:00:07.200
First, we'll review last week's results.

The conversion changes the first line (WEBVTT), the comma before milliseconds to a period, and drops cue numbers where you wish.

What Potok can do
Feature	Details
Where it works	Telegram bot @potok_now_bot; large files go through the bot's mini app
File size	Up to 2 GB
Export	TXT, MD, DOCX, PDF, SRT, VTT
Speakers and time	Speaker labels and timestamps can be switched on
Languages	About 30 languages with good published results; a few more with warnings
Translation	The transcript is not translated into another language
Dictation	A separate Potok desktop app lets you dictate text into any program; it recognises Russian speech

See the full list of languages, the tools and the glossary.

Frequently asked questions

What is the difference between SRT and VTT?

The text and the time ranges look alike. WebVTT starts with a WEBVTT header and writes milliseconds after a period, while SRT writes them after a comma.

How do I convert SRT to VTT by hand?

Add a first line with WEBVTT and a blank line after it. Then replace the comma with a period in every time that looks like 00:00:01,000.

Do I have to remove the cue numbers?

No. WebVTT allows an identifier line before the time line, so the numbered cues from SRT are valid. The example keeps them.

Where is WebVTT used?

WebVTT is the text track format for web video. If a page player asks for a track file, VTT is the format it expects.

Can I get both formats from a transcript?

Yes. The bot can export a transcript as SRT or VTT, so a conversion is only needed for a subtitle file you already have.

Sources

Each source was opened by hand on the date shown. Pages change, so open the source if a detail matters to you.

SubRip and the .srt format (Wikipedia), Wikipedia · checked 2026-10-18
WebVTT: The Web Video Text Tracks Format (W3C), W3C · checked 2026-10-18
WebVTT (Wikipedia), Wikipedia · checked 2026-10-18

Try it on your own recording