Change most types of subtitles to WebVTT format.
Drag and drop subtitle files here
Supports: .srt, .vtt, .ass, .ssa, .smi, .sub, .mpl, .txt (up to 50 files)
WebVTT (Web Video Text Tracks) is the modern subtitle format designed for web players. It supports styling, positioning, metadata, and accessibility features that make captions more flexible in browsers.
This converter keeps your timing intact while reshaping each cue to match WebVTT syntax so the file loads cleanly in HTML5 video players and video hosting platforms.
SubRip (SRT) and WebVTT share a similar structure, so the conversion is straightforward. The tool adds the required WEBVTT header and converts timestamps to the WebVTT format while preserving all dialogue and timing.
Advanced SubStation Alpha subtitles contain rich styling. During conversion, essential text and timing are kept, while highly specific effects that WebVTT does not support are simplified for consistent playback.
WebVTT unlocks several capabilities for the web. After conversion you can take advantage of:
Upload up to fifty files at once and download each WebVTT result individually. The converter processes files in parallel so you can refresh a full subtitle library quickly.
The tool supports files up to 50MB for image-based subtitles (.sup, .sub, .idx) and 5MB for text-based formats. Processing usually takes just a few seconds depending on file size and complexity.