🎬 SRT to VTT Converter

What is the SRT to VTT Converter?

SRT, short for SubRip Subtitle, is the most common caption format on the planet. Almost every desktop subtitle editor exports it, and you will find it bundled with downloaded videos and ripped from streaming sources. An SRT file is plain text made of cues, where each cue is a numbered block: a line with a counter (1, 2, 3...), a timing line that says when the caption appears and disappears, one or more lines of caption text, and a blank line that separates it from the next cue. The timestamps look like 00:00:01,000 --> 00:00:04,000, with a comma before the three millisecond digits.

WebVTT (Web Video Text Tracks), with the .vtt extension, is the subtitle format that the HTML5 <track> element understands. If you want captions to show on a video on a web page, in most browsers and in many HTML5 players, you need VTT rather than SRT. The two formats are close cousins, which is exactly why an SRT to VTT conversion is so common: the cue structure is nearly identical, and only a few mechanical changes stand between a working .srt and a working .vtt.

There are three differences that matter for a basic conversion. First, a VTT file must begin with the literal line WEBVTT, followed by a blank line, so the browser can recognise the format. SRT has no such header. Second, VTT uses a dot as the decimal separator in timestamps (00:00:01.000) where SRT uses a comma (00:00:01,000). Third, the numeric index line at the top of each SRT cue is optional in VTT and is usually dropped, because VTT treats any text before the timing line as an optional cue identifier rather than a required counter. This tool handles all three: it prepends the header, rewrites every timestamp, and removes the index numbers (or keeps them as identifiers if you prefer).

The conversion is a pure text transform, which is the key reason it is safe and instant. The tool never decodes video, never contacts a server, and never changes your wording or timing. It walks your subtitle text line by line: when it sees a line containing the cue arrow "-->", it swaps the timestamp commas for dots; when it sees a standalone number sitting directly above a timing line, it recognises that as an SRT index and removes it. Caption text, including any commas inside your dialogue, is passed through untouched. Because the change is so targeted, the output keeps your exact timing, line breaks and wording.

Knowing why each step happens helps when something looks off. If a player refuses your file, the usual culprit is a missing WEBVTT header or a stray comma left in a timestamp, both of which this SRT to VTT converter fixes automatically. If your captions appear but the timing is wrong, that is a source-file timing issue and not a format problem, since converting SRT to VTT never shifts the clock. Understanding that VTT is essentially SRT plus a header, with dotted timestamps and optional identifiers, makes the whole process predictable.

When to use it

• Adding captions to an HTML5 <video> element with a <track> tag, which expects a .vtt file rather than .srt.
• Preparing subtitles for web players and frameworks that only accept WebVTT, such as many video.js or Plyr setups.
• Converting downloaded or exported .srt files so they play correctly in a browser-based course or LMS.
• Turning subtitle editor output into VTT for a static site, portfolio video, or self-hosted clip.
• Quickly checking that an SRT file is well formed by converting it and seeing whether every cue maps cleanly to VTT.

How to use the SRT to VTT Converter

1. Open your .srt file in any text editor, select all of the text, and copy it.
2. Paste the SRT subtitles into the input box above. A sample is loaded so you can see the expected layout.
3. Leave "Keep cue numbers as identifiers" unticked for a clean VTT, or tick it if you want the original numbers preserved.
4. Press Convert to VTT. The tool adds the WEBVTT header, converts the timestamps, and drops the index lines.
5. Use Copy to grab the WebVTT text, or press Download .vtt to save a ready-to-use subtitle file.
6. Attach the .vtt file to your video with a <track kind="subtitles" src="subtitles.vtt"> tag.

Formula & method

Worked examples

What changes when you convert SRT to VTT

A single cue, before and after the SRT to VTT conversion

Common mistakes to avoid

• Forgetting the WEBVTT header. A .vtt file that does not start with the literal line WEBVTT will be rejected by the browser, and your captions simply will not appear. This SRT to VTT converter adds the header for you, so you never have to remember it.
• Leaving commas in the timestamps. If you just rename a .srt to .vtt, the timestamps still use commas (00:00:01,000) and most players will fail to parse them. VTT requires a dot before the milliseconds, which the tool fixes on every timing line.
• Only changing the file extension. Renaming subtitles.srt to subtitles.vtt does not convert the contents. The format differences (header and timestamps) still need to be applied, which is exactly what this tool does.
• Assuming conversion fixes timing or sync issues. Converting SRT to VTT never shifts the clock. If captions appear too early or too late, that is a timing problem in the source file and must be corrected separately; the format change keeps your exact timestamps.
• Pasting only part of a cue. If you copy a timing line without its caption text, or a caption without its timing line, the output will be incomplete. Copy whole cues, including the blank line that separates them.

Glossary

SRT

SubRip Subtitle: the most common plain-text subtitle format, with numbered cues and comma-separated millisecond timestamps.

VTT

WebVTT (Web Video Text Tracks): the subtitle format used by the HTML5 <track> element, using a WEBVTT header and dotted timestamps.

Cue

A single subtitle block: a timing line plus the caption text that should appear between those two times.

Timestamp

The start and end time of a cue, written as HH:MM:SS with milliseconds. SRT uses a comma before the milliseconds; VTT uses a dot.

Cue identifier

An optional label that can appear before a VTT timing line. SRT index numbers can be kept as identifiers or dropped.

WEBVTT header

The literal first line of every WebVTT file. Without it, browsers do not recognise the file as valid subtitles.

Track element

The HTML5 <track> tag that attaches a .vtt subtitle file to a <video>, enabling on-screen captions.

Millisecond field

The three digits after the seconds in a timestamp (.000), giving subtitle timing fine, sub-second precision.

Frequently asked questions