A free online audio to VTT converter — turn any audio file into a WebVTT caption file in minutes. No account, no signup, no payment.
FreeToTranscribe converts your audio straight into a ready-to-use VTT (WebVTT) caption file. Upload an MP3, M4A, WAV or other audio file, and we produce timed captions ready for HTML5 video, web players and accessibility. It is completely free — no account, no payment required.
<track> elements.Web developers and content teams use VTT (WebVTT) files to add captions to HTML5 video players using the native <track> element — no third-party player required. Podcasters add caption tracks to embedded players for accessibility compliance. Online educators use VTT with platforms like Moodle, Canvas and Brightspace that require WebVTT for closed captions. If you are publishing audio or video on the web, a VTT file is the most compatible caption format available.
Podcast producers who embed episodes directly on their own website use VTT files to add a proper caption track to the HTML5 audio or video player — a requirement for WCAG accessibility compliance and a signal to search engines that the content is captioned. A plain transcript is useful; a timed VTT file tied to the media playhead is more useful still, because it lets the listener follow the transcript in sync with the audio.
Filmmakers distributing short films through a personal portfolio site or a custom player use VTT for the same reason: it connects the caption text directly to the playback position, so viewers can follow along without a third-party player or plugin. If your hosting platform supports HTML5 <track> elements, a VTT file is the only format you need. Converting the audio track from your finished film takes a few minutes and produces a caption file ready for any web embed.
Upload MP3, M4A, WAV, OGG, FLAC, OPUS or WebM audio — up to 25MB per file. We support 15+ languages with automatic language detection, so you do not need to select a language before uploading. The VTT file you download includes accurate timestamps for every line of speech, ready to drop straight into your web project or HTML5 video player.
VTT is also the format used by most learning management systems including Moodle and Canvas, so educators who record lectures can upload a VTT file alongside the video to provide accurate captions for students who need written materials.