Free AI Speech to Text

Transcribe audio & video to text in 100+ languages. 10+ AI models. Speaker detection. No signup required.

7.2K
transcriptions
192.7K
minutes transcribed
100+
languages
70+
free tools

Works with publicly available audio & video. DRM-protected content is not supported.

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Drop file here or click to browse
MP3, WAV, M4A, FLAC, MP4, MKV, MOV, WebM — up to 2GB
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Private transcript
Chat with transcript
Unlock with Pro →
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Recording: 0:00
Real-time Vosk (instant)
Enhanced Whisper (accurate)
Public links: 24h, text only · Sign up for 7d + audio · Pro for private links

Real-time speech to text. AI auto-corrects as you speak — accuracy improves with longer speech.

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10 free min/day 600 min free with signup No credit card Encrypted
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Client-Side Encrypted Storage — Your transcripts are encrypted in your browser. Even we can't read them. Learn how it works →

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How STT.ai Works

Three steps to accurate transcription

1. Upload, Record, or Paste URL

Drag and drop any audio or video file (MP3, WAV, MP4, and 20+ formats). Record from your microphone in real-time. Or paste a link from YouTube, Vimeo, TikTok, and 1,300+ platforms.

2. AI Transcribes with Your Choice of Model

Choose from 10+ AI models including Whisper, NVIDIA Canary (#1 accuracy), and Moonshine. Auto-detect language from 100+ options. Speaker diarization identifies who said what.

3. Export, Share, or Integrate

Download as TXT, SRT, VTT, DOCX, JSON, or PDF. Share via link. Use our API to integrate transcription into your app. Perfect for subtitles, meeting notes, podcasts, and more.

100+
Languages Supported
70+
Free Tools
1,300+
Platforms Supported
7
Export Formats

Developer-First API

Integrate speech-to-text into your app in minutes. RESTful API with real-time WebSocket streaming.

REST + WebSocket — File upload and real-time streaming
Multiple models — Whisper, Canary, Enhanced & more
Speaker diarization — Auto-detect who said what
Flexible output — JSON, TXT, SRT, VTT with word timestamps
import requests

response = requests.post(
    "https://api.stt.ai/v1/transcribe",
    headers={"Authorization": f"Bearer {API_KEY}"},
    files={"file": open("meeting.mp3", "rb")},
    data={
        "model": "large-v3-turbo",
        "language": "auto",
        "diarize": "true",
        "response_format": "json",
    },
)

result = response.json()
for seg in result["segments"]:
    print(f"{seg['speaker']}: {seg['text']}")

Ready to transcribe?

Upload your first file free. No credit card, no signup. 600 minutes per month on the free plan.

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Frequently Asked Questions

speech to text runs in your browser: paste a URL, upload a file, or record from your mic. STT.ai picks the AI model and returns the transcript in under 5 minutes. Export as TXT, SRT, VTT, DOCX, JSON, or PDF.

Yes — every visitor gets 600 free minutes/month on STT.ai, usable for speech to text the same as any other workflow. Paid plans starting at $5/month unlock longer files, private transcripts, and priority queueing.

speech to text runs on the same AI models as the rest of STT.ai — our best models reach 95-97% accuracy on clean speech (3-5% Word Error Rate on benchmarks). Switch models on the fly if the first pass is below your target.

speech to text can run on any of STT.ai's 10+ models — STT.ai Enhanced (most accurate), Whisper Large V3 (99 languages), NVIDIA Canary (#1 WER on supported langs), Whisper Turbo (fast), Moonshine (lightweight), and more.

Yes. Every transcript exports as SRT or VTT — works with YouTube, Vimeo, TikTok, VLC, and every major video player. The burn-subtitles tool overlays them onto video as hardsubs.

Yes. Speaker diarization automatically labels each voice (Speaker 1, Speaker 2, ...) and you can rename them in the built-in editor. Works across all models and languages.

Most speech to text jobs finish in under 5 minutes. A 1-hour audio file typically completes in 2-3 minutes with our fastest models. Speed depends on chosen model and current GPU load.

speech to text accepts 20+ formats — MP3, WAV, M4A, FLAC, OGG, MP4, MKV, MOV, WebM, AVI, and more. Output to TXT, SRT, VTT, DOCX, JSON, or PDF.

Yes. Audio files submitted to speech to text are processed and deleted by default. Pro plans add client-side encryption — even if STT.ai's database is breached, your transcripts are unreadable without your key. Data is never used for model training without explicit opt-in.

Yes. STT.ai offers a REST API with Python and Node.js SDKs, plus an MCP server for Claude and Cursor — all usable for speech to text workflows. Free API tier includes 100 minutes/month.

Yes. Every transcript opens in the built-in editor where you can correct words, rename speakers, adjust timestamps, and add notes. All changes save automatically.

Every transcript gets a unique shareable URL. Export to DOCX or PDF for email. Pro plans add password-protected and permanent links — useful for client work.

STT.ai handles 1,300+ platforms including YouTube, Vimeo, TikTok, SoundCloud, Zoom, Google Meet, podcast hosts, and more. URL transcription works with publicly-available content only — DRM-protected sources can't be transcribed.