.SRT.VTT

SRT to WebVTT Converter

Convert SubRip (.srt) subtitle files into modern W3C WebVTT (.vtt) format with correct period timestamps and WEBVTT headers.

100% In-Browser · Zero Upload
Zero latency · Client-side Web Worker

Drop your SRT file to convert to WebVTT

or click to browse your computer

.SRT .VTT Max 25 MB
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Why Convert SRT to WebVTT?

WebVTT (Web Video Text Tracks) is the official HTML5 standard for video captions in modern web browsers, media players, and video streaming platforms like Vimeo, Cloudflare Stream, and HTML5 <track> tags.

What SubPreflight Converts:

  • Timestamp Conversion: Converts SubRip comma format (00:01:23,456) into W3C period format (00:01:23.456).
  • WEBVTT Header Injection: Adds standard compliant WEBVTT signature and metadata markers.
  • Encoding Normalization: Strips legacy byte order marks (UTF-8 BOM) and unifies line endings.