SRT to WebVTT Converter - Online Subtitle Format Changer

SRT (SubRip) is the most widely used subtitle format, plain-text based with timecodes using commas for milliseconds (00:00:01,000). WebVTT (Web Video Text Tracks) is the W3C standard for HTML5 video subtitles. The key difference is WebVTT uses periods for milliseconds (00:00:01.000), requires an optional WEBVTT header, and supports styling via CSS. WebVTT is natively supported by all modern browsers for HTML5 <video> elements.

Many modern web players, streaming platforms, and HTML5 video implementations require WebVTT format for captions and subtitles. If you're embedding videos on a website using the native <track> element, WebVTT is the recommended and most compatible format. Converting SRT to WebVTT ensures your subtitles work seamlessly across all modern browsers and platforms.

According to the W3C WebVTT specification, the WEBVTT header is required for a valid WebVTT file. While some players may work without it, including the header ensures maximum compatibility. Our tool includes it by default, but you can toggle it off if your specific use case doesn't require it. We recommend keeping it enabled for standards compliance.

Currently, this tool processes one SRT file at a time for simplicity and accuracy. If you need batch conversion, you can process files sequentially — the tool is fast and requires no page reloads. For large-scale batch processing, consider using dedicated software like FFmpeg or subtitle editing suites.

Our tool reads files as UTF-8 by default, which is the standard for WebVTT. If your SRT file uses a different encoding (like ANSI, GBK, or Latin-1), you may see garbled characters. In that case, open your SRT file in a text editor (like VS Code or Notepad++), re-save it as UTF-8, and then use our converter. WebVTT files must be UTF-8 encoded per the W3C specification.

Yes! WebVTT supports a subset of HTML tags for text styling, including <b>, <i>, <u>, and <span> with CSS classes. If your SRT file contains these tags, they will be preserved during conversion. Additionally, WebVTT supports <c> tags for semantic voice labeling and CSS-based styling via ::cue() selectors, offering much more flexibility than SRT.

Yes, the reverse conversion is straightforward: replace periods with commas in timecodes and remove the WEBVTT header. While this tool focuses on SRT → WebVTT conversion, the process is fully reversible. Many online tools offer bidirectional conversion. The main thing to watch for is that WebVTT-specific features (like CSS styling, regions, or comments) may not translate back to plain SRT.