MP3 to VTT Subtitles — Convert Audio to WebVTT Online
Turn any MP3 into timestamped WebVTT (.vtt) subtitles with AI. Free 2-minute preview, no account, download .vtt/.srt/.txt/.md.
99+ languages
auto-detected
2-min preview
always free
4 formats
vtt · srt · txt · md
500 MB
max upload
WebVTT is the native caption format for HTML5 <video> — browsers render it through the <track> element with no plugin or extra software. But going from a raw MP3 to a working .vtt file used to mean a full transcription in one app, then a caption pipeline in another.
AudioToVTT does the whole job in one step: upload the MP3, watch a free 2-minute transcript preview with live cues, then unlock the full export. You get clean, timestamped WebVTT (plus SRT, plain text and Markdown) that drops straight into your player, editor or upload.
Long files are handled automatically — anything over ~25 minutes is split at silence and merged with correct timing, so a podcast or lecture MP3 works without any manual editing.
Accurate AI transcription with automatic language detection
Precise HH:MM:SS.mmm WebVTT timestamps for every cue
Free 2-minute preview before you pay — zero risk
Also downloads .srt, .txt and .md in the same purchase
No account, no subscription — $1.50 per full export or 1 credit
Files deleted after export
Upload right now
Free 2-minute preview, no account. Pay only when you export.
Frequently asked questions
How do I convert an MP3 to WebVTT? ▾
Upload the MP3, view your free 2-minute preview with cues, then unlock the full export. Hit download and choose .vtt — each spoken segment gets a start/end WebVTT timestamp.
Can I convert a long MP3, like a podcast? ▾
Yes. Long audio is automatically split at silence and merged back with correct timing, so hour-long podcasts convert cleanly.
Is converting an MP3 to VTT free? ▾
The first 2 minutes are always free as a preview. A full export is $1.50 or 1 credit — no subscription.