How to convert SUB to VTT
1. Upload SUB
Select or drag and drop your SUB file into the converter.
2. Choose VTT
Select VTT as your output format. You can process multiple files at once.
3. Download
Click convert and download your new VTT file instantly.
Format Details
SUB
SUB (MicroDVD Subtitle) is a subtitle format that stores timing as video frame numbers rather than absolute timestamps, making it intrinsically frame-rate dependent. Each subtitle entry uses curly-brace notation for frame numbers and supports basic inline formatting. SUB is a legacy format from the DVD ripping era that is still supported by major media players, though SRT and VTT have largely replaced it for new subtitle content.
VTT
VTT (WebVTT, Web Video Text Tracks) is the W3C-standard subtitle and caption format for HTML5 video, designed to work natively in web browsers without plugins. It supports text cues with precise timing, multiple text tracks, and CSS-based styling for rich caption presentation. VTT is the required format for closed captions on web video platforms, streaming services, and accessibility-compliant applications.
Frequently Asked Questions
How do I convert SUB to VTT?
Upload your SUB file on Convertek, select VTT as the output format, then click Convert. Your VTT file will be ready to download instantly.
Is the SUB to VTT converter free?
Yes. Converting SUB to VTT on Convertek is completely free with no watermarks. Fair upload limits apply (typically 30 MB per file).
Is my file kept after conversion?
No. Files are processed temporarily and not stored permanently. Converted downloads are available only in your browser session.
What is the difference between SUB and VTT?
SUB and VTT are different file formats with distinct use cases. Converting between them lets you use your file in software or workflows that require the VTT format.