How to Convert Audio to Text Free — 5 Best Methods

Converting audio to text — also called transcription — is useful for meetings, interviews, podcasts, lectures, and voice memos. Whether you need it done in real time or by uploading a file, there are several free and low-cost ways to do it. Here are the best methods available today.

Method 1: Google Docs Voice Typing (Free, Real-Time)

Google Docs has a built-in Voice Typing feature that transcribes speech from your microphone in real time. It is completely free and requires only a Google account.

1. Open Google Docs and create a new document.
2. Go to Tools → Voice Typing (or press Ctrl+Shift+S).
3. A microphone icon appears. Click it to start recording.
4. Speak or play your audio near the microphone — Google transcribes it in real time.
5. Click the microphone again to stop.

Best for: Short audio, live meetings, dictating notes. Not ideal for pre-recorded audio files.

Method 2: YouTube Auto-Captions (Free, Audio/Video Files)

YouTube automatically transcribes any video you upload. You can use this to transcribe audio files too:

1. Upload your audio or video file to YouTube as Unlisted (so only you can see it).
2. Wait a few minutes — YouTube generates automatic captions.
3. Go to YouTube Studio → Subtitles → your video → Auto-generated captions.
4. Click the three-dot menu and choose Download (.srt or .vtt format) — or open the transcript and copy the text.

Best for: Audio and video files up to 15 hours. Free and surprisingly accurate for clear speech.

Method 3: Otter.ai (Best Free Tier for Upload)

Otter.ai is a dedicated transcription service with a free tier that allows importing audio files:

• Free plan: 300 minutes of transcription per month, 3 audio imports per month.
• Supports MP3, MP4, WAV, M4A formats.
• Generates a searchable transcript with speaker labels.
• Export as .txt or .docx.

Best for: Meeting recordings, interviews, and anything under 300 minutes per month where you want a clean, searchable transcript.

Method 4: OpenAI Whisper (Free, Offline, Most Accurate)

Whisper is an open-source speech-to-text model released by OpenAI. It runs entirely on your computer (no internet required after download) and is widely considered the most accurate free transcription tool available.

• Supports 99 languages.
• Works with audio and video files (MP3, WAV, MP4, M4A, etc.).
• Completely free and private — nothing leaves your device.
• Requires Python and a terminal to run.

Basic usage:

1. Install Python and run: pip install openai-whisper
2. Run: whisper your-audio-file.mp3 --language English
3. Whisper saves the transcript as .txt, .srt, and .vtt files in the same folder.

Best for: Anyone comfortable with the command line who needs accurate transcription of longer recordings.

Method 5: Microsoft Word Dictate (Free, Real-Time)

Microsoft Word (Microsoft 365) has a built-in Dictate feature similar to Google Docs Voice Typing:

1. Open Word online or the desktop app.
2. Go to Home → Dictate.
3. Click the microphone and speak or play audio near your microphone.
4. Word transcribes in real time.

Comparison: Which Tool to Choose?

• Real-time, free: Google Docs Voice Typing or Microsoft Word Dictate
• Upload a file, free: YouTube auto-captions or Otter.ai (free tier)
• Best accuracy, fully offline: OpenAI Whisper
• Best paid option: Otter.ai Pro, Rev, or Descript for professional transcription