Convert SubRip (SRT) subtitle files to standard WebVTT (VTT) for web players and HTML5 video. Also supports VTT to SRT. 100% in your browser.
Geek check: open DevTools → Network tab — 0 bytes of your data uploaded.
Processed 100% locally in your browser — files never leave your device.
Click “Select Subtitle File” or drag your .srt file into the converter box above.
The parser instantly transforms timestamp delimiters from commas to periods and prepends the standard WEBVTT header.
Review the parsed subtitle cue list, timings, and word count statistics in the interactive preview table.
Click “Download .vtt” to save your converted file, or click “Copy” to paste directly into your code.
SubRip (.srt) is the traditional standard for desktop media players and video editing software. It structures subtitles with sequential numeric indices, newline breaks, and comma-separated millisecond timestamps (e.g. 00:01:23,456).
WebVTT (.vtt, Web Video Text Tracks) is the W3C standard designed specifically for HTML5 web video. WebVTT files must begin with a 'WEBVTT' header line, use periods instead of commas for milliseconds (e.g. 00:01:23.456), and support optional CSS cue styling (::cue), speaker tags (<v Alice>), and screen position coordinates.
When embedding video on websites using the standard HTML5 <video> tag, browsers require the <track> element to supply captions. Web browsers natively parse WebVTT files to render subtitles over video elements on desktop and mobile devices without external JavaScript plugins.
Converting your legacy SRT subtitles to clean WebVTT ensures smooth caption accessibility on Safari, Chrome, Firefox, and Edge.
This converter is fully bi-directional. If you have WebVTT caption files downloaded from a web video platform and need to import them into Adobe Premiere Pro, DaVinci Resolve, or Final Cut Pro, drop the .vtt file in.
The tool removes the WEBVTT header, converts periods back to commas, regenerates sequential cue numbers, and outputs a standard .srt file ready for your video editor.
Your subtitle files often contain unreleased video scripts, confidential meeting transcripts, or proprietary training material. Unlike traditional cloud converters that upload your text files to remote servers, YuliusBox parses and converts your subtitles 100% locally in your browser memory.
SRT uses comma millisecond delimiters (00:00:01,500) and sequential numbering. WebVTT starts with a mandatory 'WEBVTT' header, uses dot millisecond delimiters (00:00:01.500), and supports CSS styling and web browser <track> tags.
Yes. When you load a WebVTT file, the tool detects the format and provides a 'Convert to SRT' action, formatting the output with standard comma timestamps and sequential numbers.
No. The converter performs an exact numerical timestamp translation without altering start or end cue points. Your audio-visual synchronization remains identical to the original.
Add a <track> element inside your <video> tag: <track label="English" kind="subtitles" srclang="en" src="subtitles.vtt" default>. The browser handles rendering automatically.