Instant subtitle conversion.
Zero server uploads.
Convert standard SubRip (.srt) files to HTML5 WebVTT (.vtt) format with pixel-perfect timestamp accuracy. Everything runs locally inside your browser for maximum privacy.
Drag and drop your .srt file here
or select a file from your hard drive
Convert in three simple steps
Select subtitle file
Drag and drop your standard .srt file into the conversion area above. We support UTF-8 encodings natively.
Choose output configurations
Keep WebVTT defaults or customize styling parameters, meta tags, and alignments.
Download VTT
Click convert and grab your fully compatible .vtt file instantly. No servers, completely offline.
Built for speed & confidentiality
Runs in your browser
Your files are parsed natively in your browser's sandbox. Data never travels across the internet, protecting sensitive footage and scripts.
Near-instant processing
Built on efficient JavaScript file parsing. Large subtitle files convert in well under a second, with alignment preserved exactly.
100% free & unlimited
No registration, no subscription paywalls, no feature caps. Convert as many subtitle files as you need, whenever you need to.
Built for modern web video players
WebVTT is the default subtitle standard for HTML5 video elements. SubShift formats track indicators, time dividers, cues, and styles to match the spec exactly.
- Compliant with standard HTML5 video track players
- Works with video.js, JW Player, and Plyr
- Supports custom line coordinates, cue positioning, and alignment
- Keeps subtitle colors, bold weight, and italic tags intact
Compare formats
| Property | SRT | WebVTT |
|---|---|---|
| Timestamp divider | 00:01:20,000 | 00:01:20.000 |
| CSS styling | Basic HTML only | Native CSS cues |
| Positioning tags | Unsupported | Fully supported |
| Browser support | Requires plugin | Native |
Frequently asked questions
Are my subtitle files securely processed?
Yes, 100%. SubShift compiles files locally in your browser. Your subtitle text and timestamps are never uploaded to any server or cloud database.
What is the difference between SRT and VTT?
SRT is a plain-text subtitle format built for desktop media players. WebVTT (VTT) is designed for modern HTML5 browser players and supports styles, positioning, and cues.
Can I convert massive movie or track lengths?
Yes. Because conversion runs locally in memory, you can process files of any length without hitting typical upload or API size limits.
Ready to convert your subtitles?
Convert your SRT transcripts into WebVTT format. Fast, local, and completely private.
Scroll to convert now ↑