Free Audio Transcript Generator
Convert speech to text live in your browser. No account, no upload, no limits — your audio stays on your device.
Nimitai's free audio transcript generator converts speech to text live in your browser using the Web Speech API. Click record, speak (or play an audio file), and get a real-time transcript you can copy or download as .txt — no signup, no upload, no limits. Audio never leaves your device.
Click "Start recording" or upload an audio file. Your transcript will appear here in real time.
Audio never leaves your browser. The Web Speech API runs locally on your device. Nimitai does not store, log, or upload your audio or transcript.
Need 99% accuracy + speaker ID + AI summaries?
This free tool is great for quick notes — but for B2B sales calls you need more: speaker diarization, deal risk detection, talk-ratio analysis, and AI coaching scorecards on every call.
How does this compare to Otter, Rev, and Trint?
Quick comparison of free transcript options
| Tool | Free tier | Accuracy | Best for |
|---|---|---|---|
| This tool (Nimitai) | Unlimited, no signup | 85–92% | Quick notes, voice memos, lectures |
| Otter.ai | 300 min/month, signup required | ~94% | General meetings, basic summaries |
| Rev (AI) | No free tier ($0.25/min AI, $1.99/min human) | ~92% AI / 99% human | Legal, podcast, courtroom-grade |
| Trint | 7-day trial only | ~95% | Newsrooms, multilingual content |
For B2B sales call intelligence (deal risk, coaching scorecards, talk-ratio analysis), see Nimitai pricing.
Frequently asked questions
Is this audio transcript generator really free?
Yes — completely free, no signup, no credit card. The tool runs locally in your browser using the Web Speech API. Your audio never leaves your device, and there are no usage limits, watermarks, or paywalls. For higher-accuracy transcription with speaker identification and AI summaries, Nimitai offers a paid plan starting at $149/month.
How accurate is the transcription?
The browser-based Web Speech API delivers around 85–92% accuracy on clear English speech in a quiet environment. Accuracy drops with background noise, accents, multiple speakers, or low-quality microphones. For B2B sales calls or production use cases that need 95%+ accuracy plus speaker diarization, use a dedicated platform like Nimitai, Otter, or Rev.
Does my audio get uploaded to a server?
No. The Web Speech API runs locally on your device — your microphone audio is processed in your browser and never sent to Nimitai or any third party. Some browsers (Chrome) route speech to Google for processing under the hood, governed by their privacy policy. For fully on-device transcription, use Firefox or a desktop tool.
Can I transcribe pre-recorded audio files like MP3 or WAV?
Yes — upload an audio file (MP3, WAV, M4A, OGG) and the tool will play it through your speakers and capture the transcript via your microphone. For best results, use headphones disabled and play at moderate volume. For direct file-to-text transcription without playback, use Nimitai or any cloud transcription service.
Which browsers support this transcript generator?
Chrome, Edge, Safari (14+), and Opera support the Web Speech API. Firefox has limited support. The page must be served over HTTPS for microphone access. If your browser doesn't support live transcription, you'll see a notice explaining why and a recommendation for alternative tools.
Want production-grade transcription for sales calls?
Nimitai records every Zoom, Meet, and Teams call automatically — with speaker labels, deal-risk signals, and AI coaching on top.
See Nimitai pricing →