Bulk Transcribe Audio to Text Online Free
Transcribe hours of audio in seconds with OpenAI Whisper — 200x realtime.
Drop up to 50 files at once — no install, no sign-up required.
Drop Audio or Video Files Here
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How it works
- 1 · Drop your files
Drag & drop audio or video files. Supports MP3, WAV, M4A, MP4, and more. No account required.
- 2 · We transcribe securely
Transcribed by OpenAI Whisper V3 Large, then formatted with ML paragraph intelligence. Encrypted in transit & at rest. Choose TXT, SRT, or VTT output.
- 3 · Download & auto-delete
Get your transcription in seconds. Files delete automatically after 1 hour.
Frequently Asked Questions
What audio and video formats are supported?
Audio formats: MP3, WAV, M4A, FLAC, OGG, OPUS, AAC
Video formats: MP4, WebM, MKV, MOV, AVI (we extract the audio track)
What output formats are available?
Choose the format that fits your use case:
- TXT — Plain text with intelligent paragraph breaks (ML-powered)
- SRT — Subtitles with timestamps for video players
- VTT — Web captions for HTML5 video
- PDF — Professional document with AI title for sharing/archiving
- Word — Editable document with AI title
- Markdown — Clean format for note-taking apps
What languages are supported?
Automatic language detection via OpenAI Whisper. 99+ languages including:
English, Spanish, French, German, Italian, Portuguese, Dutch, Polish, Russian, Japanese, Korean, Chinese, and many more.
Mixed-language content is handled automatically.
How accurate is the transcription?
We use OpenAI Whisper V3 Large — one of the most accurate speech recognition models available.
On clear recordings, it achieves near-human accuracy. Our ML post-processing structures the transcript into clean, readable paragraphs.
Results vary with audio quality — see our FAQ on accuracy limitations below.
Is the transcription guaranteed to be perfect?
No — and no transcription service can guarantee 100% accuracy.
Whisper V3 Large achieves near-human accuracy on clear recordings in major languages. However, accuracy depends on:
- Audio quality and background noise
- Speaker clarity and accents
- Multiple overlapping speakers
- Domain-specific jargon and proper nouns
We recommend reviewing transcripts for critical use cases (legal, medical, published content).
How does the paragraph formatting work?
After transcription, we run your text through a machine learning model trained specifically for paragraph segmentation.
It analyzes sentence structure and topic flow to determine natural paragraph breaks — turning a wall of continuous text into clean, readable paragraphs.
This works automatically for text and document outputs (TXT, PDF, Word, Markdown, EPUB); SRT and VTT formats retain timestamped segments for subtitle synchronization.
How long can my audio files be?
Duration limits depend on your plan:
- Guest/Free: 60 minutes (1 hours)
- Pro: 300 minutes (5 hours)
- Business: 300 minutes (5 hours)
This accommodates everything from short clips to full podcasts and lectures.
How much does transcription cost?
Transcription costs 1 credit per minute of audio.
A 30-minute podcast costs 30 credits.
- Guest: 50 credits daily
- Free: 50 credits daily
- Pro: 10000 credits monthly
Which output format should I choose?
- Plain Text — Raw transcript for scripts or simple reading
- SRT/VTT — Subtitles for video (SRT for editors, VTT for web)
- PDF — Fixed document to share or archive
- Word — Editable for corrections and collaboration
- Markdown — Notes apps (Obsidian, Notion)
- EPUB — E-readers (Kobo, Apple Books)
What are the limits for this converter?
| Tier | Max File Size | Max Files/Batch | Parallel Processing |
|---|---|---|---|
| Free | 100 MB | 50 files | 2 at once |
| Pro | 500 MB | 200 files | 4 at once |
| Business | 1024 MB | 1000 files | 6 at once |
Note: File size limits are specific to this converter. Batch and parallel processing limits apply to all images converters site-wide. See all converter limits →
How are credits calculated for this conversion?
Cost: 1 credit per minute
How it works:
- Files up to 1 minutes: 1 credit (minimum)
- 2 minutes: 2 credits
- 3 minutes: 3 credits
- 4 minutes: 4 credits
Example: A 10-minute file = 10 credits. A 180-minute (3h) audiobook = 180 credits.
Why per-minute? Audio conversion time scales with content duration, not file size. Longer audio requires proportionally more processing.
What are my daily and monthly credit limits?
Credit allocations vary by account tier:
| Tier | Daily Limit | Monthly Limit |
|---|---|---|
| Free | 50 credits/day | — |
| Pro | — | 10,000 credits/month |
| Business | — | 25,000 credits/month |
Daily credits (Free tier, including guests) reset every day at midnight UTC. Monthly credits (Pro & Business) reset on your billing cycle date.
Note: With 1 credit per minute, audio files under 1 MB cost 1 credit each. Pro users can convert 10,000 audio files per month.
Answers at a Glance
Quick answers to common questions.
- Are my files secure?
- How long do you keep my files?
- What metadata do you keep?
- What happens after I drop a file?
- Why are conversions so fast?
- How do you measure performance?
- What are the exact limits for each plan?
- Can I process files in bulk?
- Why did my file fail to convert?
- Do you use my files to train AI?
Choose Your Plan
Limits shown for Audio to Text conversion. One subscription unlocks the entire Tools.FAST Network. Plans cover Convert.FAST, Compress.FAST, PDF.FAST (soon), and all future tools.
Free
For occasional personal use
- 100 MB per file
- 50 files per batch
- 2 parallel standard conversions
- 2 parallel AI conversions
- 50 credits/day
- Standard priority
- Email support
No sign-up required.
Create an account for your own credit pool.
Pro
For independent work
- 500 MB per file
- 200 files per batch
- 4 parallel standard conversions
- 4 parallel AI conversions
- 10,000 credits/month across Tools.FAST
- High priority
- Email & chat support
- One subscription for the entire Tools.FAST network
Business
For production scale
- 1 GB per file
- 1000 files per batch
- 6 parallel standard conversions
- 6 parallel AI conversions
- 25,000 credits/month across Tools.FAST
- Add seats to invite team members
- Highest priority
- Priority email & chat support
- One subscription for the entire Tools.FAST network
How Credits Work
- Usually 1 credit per conversion. Exact cost shown before you start.
- Credits refresh monthly on your billing cycle.
- Unused credits roll over, capped at your plan's monthly amount.
- One subscription, all sites. Works across Convert.FAST, Compress.FAST, and future tools.
What's New in Audio to Text
Latest improvements to this converter
Added transcription mode selection: English (Fast) for English audio, Multilingual for 99 other languages.
All Transcription Formats
Dedicated converters with format-specific options: