Generate VTT Captions Online

Audio to VTT Converter FREE

Generate standard WebVTT (.vtt) caption tracks from spoken audio for modern HTML5 web video players and online courses.

✓ No Account Required ✓ No API Key Needed ✓ OpenAI Whisper AI ✓ 100% Free

Audio • 48 kHz Stereo

Interview_Session_Q3.mp3

⚡ Whisper AI. 99.2% Accurate.

SRT Subtitles

“Welcome everyone to today’s session…”

Clean TXT

00:01:24 [Speaker 1] Key discussion points

VTT Captions

Synced timestamps

Drop your file here

Fast speech recognition powered by Whisper

or drag and drop your file here

MP3 WAV M4A MP4 WebM FLAC Opus

Recommended file size up to 500 MB for fast browser decoding • 30 min limit on mobile

0 MB • Calculating duration...

00:00

Ready to record microphone audio

Model Profile Whisper • Cloud AI

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Language 13 languages supported

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Transcription Engine Cloud AI

☁️ Whisper AI Cloud

Transcribing Speech with AI

Transcribing audio using Whisper. Please wait a moment...

Initializing neural engine... 0%

Audio Length —

Elapsed —

Remaining Calculating...

Speed —

Streaming Transcript Preview

Awaiting initial speech segment...

No Speech Detected

The audio contains only silence, background noise, or unsupported frequencies.

Direct Answer

What is WebVTT and how do I convert audio to VTT?

WebVTT (Web Video Text Tracks) is the W3C standard subtitle format for HTML5 elements. The Tool Room decodes your audio in your browser and exports compliant .vtt files with standard WEBVTT headers and period-separated millisecond timestamps via Whisper AI.

Private & Secure

Confidential Transcription

The Tool Room processes speech with state-of-the-art Whisper AI without storing your media or logging personal data.

Step 1 Select audio or video

Step 2 Audio decoded in browser

Step 3 Whisper AI generates transcript

Step 4 Export text with zero retention

3 Simple Steps

How It Works

Turn audio and video into accurate text in seconds — completely online with zero setup.

Step 01

Choose a file

Drop in any audio or video file, or record live speech directly from your microphone with one click.

MP3 WAV MP4 M4A 🎙️ Mic

Step 02 • AI

Transcribe with AI

Whisper accurately transcribes speech with automatic punctuation and language detection.

Whisper • 13+ Languages

Step 03

Export your text

Copy with one click or download as TXT, SRT subtitles, VTT, Markdown, or save directly to Google Drive.

TXT SRT VTT Markdown ☁️ Drive

Key Capabilities

Built for Accuracy & Speed

Focused speech-to-text features powered by advanced neural models.

Whisper AI Model

No Account Required

Start transcribing immediately without creating an account or entering credentials.

Multiple Formats

Support common audio and video formats including MP3, WAV, M4A, MP4, WebM, and FLAC.

Timestamped Transcripts

Create SRT/VTT files when timestamps are available for subtitles and captions.

Searchable Transcript

Find words and phrases instantly. Edit text inline directly in the browser.

Instant Export

Download your transcript directly as TXT, SRT, VTT, Markdown, or JSON.

Real-World Audio

Built for real-world audio

Designed for interviews, lectures, meetings, podcasts, and personal notes.

Meetings →

Private transcriptions for confidential team discussions and executive reviews.

Lectures →

Convert academic courses and talks into searchable, organized study notes.

Interviews →

Fast, timestamped text for journalistic and qualitative research interviews.

Podcasts →

Generate episode transcripts, show notes, and accurate episode quotes.

Voice Notes →

Turn quick voice memos and personal dictation into clean, editable text.

Research & Notes →

Analyze field recordings and sessions without third-party data leaks.

Videos →

Extract dialogue and create SRT/VTT subtitle files for video editing.

Personal Recordings →

Transcribe personal audio files directly on your computer or phone.

Compatible Containers

Supported Formats

The Tool Room processes common audio and video formats directly in modern browsers.

Audio Formats

MP3 WAV M4A FLAC AAC OGG OPUS

Video Formats

MP4 WebM

Deep Dive

W3C WebVTT Specification Compliance

Clean subtitle integration for web development and e-learning platforms.

WebVTT is the official captioning format recognized by modern browsers for <track kind="subtitles"> elements inside HTML5 video tags. The Tool Room ensures strict compliance with the W3C recommendation, including the required WEBVTT header and period-delimited timestamps (00:00:01.500 --> 00:00:04.200).

Clear Answers

Frequently Asked Questions

Direct answers about AI audio transcription, supported formats, and privacy.

Will this VTT work in custom HTML5 video players? ▼

Yes, fully compatible with standard HTML5 video elements, Video.js, Plyr, and modern e-learning learning management systems (LMS).