Audio to VTT
Upload any audio file and receive a WebVTT (.vtt) caption file with accurate timestamps, ready for HTML5 video players, Vimeo, or any streaming platform. Perfect for developers, e-learning creators, and podcast producers who need caption files without committing to a monthly subscription.
Drop your file here
MP4 · MOV · MP3 · WAV · WebM · MKV and more
5 free minutes · no account needed · no watermark
How to audio to vtt
- 1
Upload your audio file
Drag your audio file into CentClip or click to browse - no account or sign-up is required. Common formats including MP3, WAV, AAC, M4A, and OGG are all accepted. Your first 5 minutes of audio are transcribed free, with no payment details needed upfront.
- 2
Choose your language
Select the spoken language from more than 50 supported options so the engine transcribes what was said rather than attempting to translate it. CentClip detects speech in the audio and generates precise word-level timestamps used to align your VTT cues. This step takes seconds and runs automatically after you confirm your language selection.
- 3
Download your VTT file
Once processing finishes, download your WebVTT file directly - it is named and formatted for immediate use in any compatible player. You can also grab an SRT file, a plain text transcript, or a burned-in MP4 from the same job if your workflow needs more than one output format. Credits never expire, so there is no pressure to rush.
Why choose CentClip?
VTT timestamps align to the millisecond, not just the second
WebVTT uses millisecond-precision timestamps, which matters when your player is advancing quickly or your speaker shifts topics mid-sentence. CentClip's transcription engine generates word-level timing internally and writes that precision directly into your VTT cue boundaries. The result is captions that feel synchronised rather than lagging behind the audio - a common complaint with tools that round cue times to the nearest whole second.
Audio-only files do not need a video wrapper
Many captioning tools are built around video editing pipelines and expect an MP4 or MOV upload. CentClip accepts raw audio files directly - MP3, WAV, AAC, FLAC, and others - so podcast episodes, voice-over recordings, and audio-only interviews do not need to be wrapped in a dummy video container first. The VTT output references cue timing only, making it ready to pair with whatever video asset you have downstream.
No monthly plan needed for sporadic captioning work
Developers adding captions to a handful of course videos, or editors captioning an interview series once a quarter, rarely have the volume to justify a subscription. CentClip charges 5 cents per minute with no recurring fee - you buy credits when a job arrives and the balance stays in your account until the next one. That model makes far more sense than paying for 12 months of access to caption a few audio files a year.
FAQ
How accurate are the VTT captions CentClip produces from audio?
Accuracy is high for clear speech in a quiet environment - typically above 95% word accuracy. Audio with heavy background noise or strong accents may need light editing, which is straightforward since CentClip also provides a plain text transcript alongside every VTT file.
Is there a free trial for Audio to VTT conversion?
Yes - your first 5 minutes of audio are converted to VTT free with no account required. After that, pricing is 5 cents per minute with no subscription or monthly fee.
What audio formats can I upload to generate a VTT file?
CentClip accepts all common audio formats including MP3, WAV, AAC, M4A, FLAC, OGG, and OPUS. Video files such as MP4 and MOV are also accepted if you want to generate captions directly from a video file.
Do my credits expire if I only have a few audio files to caption?
No - credits never expire. Buy a small batch when you have a project and use the remaining balance whenever your next audio file comes in, whether that is next week or next year.