SRT to VTT Converter

Local-first

Convert SRT subtitles to WebVTT locally for HTML5 video captions and web publishing workflows.

What is SRT to VTT?

Convert SRT subtitles to WebVTT locally for HTML5 video captions and web publishing workflows.

Convert SRT subtitles to WebVTT
Fix timestamp decimal separators
Copy or download VTT output

How to use it

Paste the SRT, VTT content you want to process.
Adjust quality, size, or output options when available.
Run the tool to convert SRT to VTT and preview the result on the page.
Copy the output or download the generated file when it looks right.

Quick example

Example input

00:00:01,000 --> 00:00:03,000

Expected output

WEBVTT

00:00:01.000 --> 00:00:03.000

Preview captions after conversion because players handle cues differently.

Best use cases

Clean developer data during debugging, API work, and documentation.
Clean content before saving configs, sharing snippets, or importing tables.
Use it when privacy matters and the input should stay inside the browser.

Official standards and scope

W3C specifies WebVTT, Matroska documents common SRT subtitle structure, and the HTML Standard defines text tracks. This page trims the input, removes a leading byte-order mark, deletes every line whose trimmed content contains only digits, changes only timestamps matching exactly HH:MM:SS,mmm to HH:MM:SS.mmm, and prepends WEBVTT. It is not an SRT parser or a WebVTT validator. Numeric-only subtitle text is lost along with sequence-number lines; malformed cue blocks, invalid ranges, overlapping or reversed times, identifiers, coordinates, style markup, notes, encoding, and line-ending rules are not checked or converted. Timestamps with one-digit hours or non-three-digit milliseconds are left unchanged. The output can therefore be invalid WebVTT even when it looks plausible. Validate cues and playback in the intended browser or media pipeline before publishing captions.

Web Video Text Tracks Format (WebVTT) - World Wide Web Consortium (W3C)
Matroska Technical Documentation: SRT subtitles - Matroska project
WHATWG HTML Standard: Text track API - WHATWG

Sources checked July 27, 2026. Standards and platform rules can change; review the original sources again before formal integration or compliance decisions.

Notes

Browser support for SRT, VTT can affect preview and export behavior.
Invalid input will show an error when possible, but the tool will not guess missing fields.
Preview the result before using it in production, publishing, or submission workflows.

FAQ

What changes in VTT?

The tool adds the WEBVTT header and converts comma time decimals to dots.

Is SRT to VTT free to use?

Yes. You can use it directly in the browser without creating an account.

Does SRT to VTT support batch processing?

Text tools usually process one pasted input at a time, so split large jobs into smaller inputs.

Are files or content uploaded?

SRT to VTT runs in your browser, so your input or files are not uploaded to DataHub servers.

Can I use SRT to VTT on mobile?

Yes, but desktop browsers are better for large files, batch conversion, or long text input.

Why can conversion or validation fail?

Common causes include invalid syntax, missing required fields, or invisible characters copied with the input.

Can I use the result commercially?

The tool only processes your own input. Commercial use depends on the rights of the original file or data.

Related tool guides

Subtitle Tools Convert SRT, VTT, ASS, SSA, SBV, CSV subtitle formats, extract transcript text, and shift subtitle timestamps locally in the browser.