VTT vs SUB — Comparison & Free Converter
Fast, instant VTT (WEBVTT) to SUB (MICRODVD) conversion. No signup required. Just drop your .vtt file and get .sub in seconds.
Batch Settings
La conversion de fichiers de sous-titres est une tâche courante dans le monde de la production audiovisuelle et de l'accessibilité numérique. Si vous travaillez fréquemment avec des médias, vous avez probablement rencontré le format WebVTT (VTT), couramment utilisé pour les vidéos en ligne et les plateformes de streaming. Cependant, pour des besoins de compatibilité avec des logiciels de montage plus anciens, des lecteurs multimédias spécifiques ou des systèmes de diffusion broadcast, le format SubRip (SUB) reste une alternative fiable et largement supportée. Notre outil vous permet de transformer vos fichiers VTT en SUB de manière précise et efficace, garantissant la préservation de la synchronisation et du contenu textuel. Simplifiez vos flux de travail et assurez une interopérabilité sans faille entre vos différents outils et plateformes, que ce soit pour des projets personnels ou des productions professionnelles exigeantes. Cette conversion est essentielle pour maintenir la flexibilité de vos projets de sous-titrage.
- Archivage de contenu audiovisuel patrimonial
- Localisation de documentaires pour la diffusion télévisée
- Intégration dans des logiciels de post-production cinématographique
En France, les normes du CSA (Conseil Supérieur de l'Audiovisuel) pour la diffusion peuvent parfois impliquer des formats de sous-titres spécifiques, où le SUB est encore pertinent pour certaines chaînes historiques, bien que le VTT soit de plus en plus accepté pour le numérique.
About VTT (WEBVTT) to SUB (MICRODVD) Conversion
VTT or SUB — which format should you use? The answer depends on your needs. Here's a quick breakdown.
VTT (WebVTT) is the web-standard subtitle format used in HTML5 video players. It has mostly universal platform support. SUB is a widely used file format. It has common platform support.
So when should you convert VTT to SUB? This conversion is ideal when you When you need a SUB file. This conversion helps you convert between formats quickly.
Converting VTT to SUB maintains high quality with CocoConvert's optimised encoder settings.
If you've decided SUB is the right choice, CocoConvert makes the conversion effortless. Upload your .vtt file, pick SUB, and click Convert — done in seconds. The converter runs on secure servers in Germany, powered by FFmpeg, Sharp, and qpdf. Files are encrypted via TLS and erased within 24 hours.
Free tier: 5 files/hour, 250 MB each. Pro: 100 files/hour, 5 GB each. Works in every modern browser on desktop and mobile.
How to Convert VTT (WEBVTT) to SUB (MICRODVD)
- 1
Choose your VTT file
Upload your .vtt file using drag-and-drop or the file browser. Batch mode lets you add multiple files.
- 2
Set format to SUB
Select .sub from the output options. The converter applies optimal quality settings automatically.
- 3
Run the conversion
Click Convert. Server-side processing means your device stays fast — even for large subtitle / caption files.
- 4
Get your SUB file
Download your converted file instantly. Batch downloads are available as a zip archive.
What Happens When You Convert VTT (WEBVTT) to SUB (MICRODVD)
Your VTT file is decoded and re-encoded as SUB.
Your VTT file is uploaded and validated
The file is decoded (parsed into its raw data)
The data is re-encoded in SUB format
The converted file is ready for download
Format Comparison
VTT (WebVTT)
.vtt file
| Extension | .vtt |
| MIME Type | text/vtt |
| Category | Subtitle / Caption |
SUB (MicroDVD)
.sub file
| Extension | .sub |
| MIME Type | text/x-sub |
| Category | Subtitle / Caption |
Should You Convert VTT (WEBVTT) to SUB (MICRODVD)?
When to Convert
- ✓When you need a SUB file
Frequently Asked Questions
Should I use VTT or SUB?
It depends on your goal. VTT preserves full quality. SUB preserves full quality. Choose based on whether file size or quality matters more for your use case.
Is SUB higher quality than VTT?
Not necessarily. Converting VTT to SUB maintains high quality with CocoConvert's optimised encoder settings. Quality depends on the compression type and settings, not just the format name.
Can I convert VTT to SUB on Mac and Windows?
Yes. CocoConvert is a web-based tool that works in all modern browsers — Chrome, Safari, Firefox, Edge — on any operating system including macOS, Windows, Linux, iOS, and Android.
Is CocoConvert free for VTT to SUB?
Yes. Free users get 5 conversions per hour (250 MB each). Pro subscribers unlock 100 files per hour, 5 GB per file, and priority processing.
What tools does CocoConvert use for VTT to SUB?
CocoConvert uses FFmpeg for audio/video, Sharp for images, and qpdf for documents — the same open-source libraries used by Netflix, YouTube, and major enterprise platforms.