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Lecture Transcription

Commercial use OK 380+ models No watermark No sign-up needed
Model:
+ GPT-5, Claude, Gemini
Upload a lecture recording and get a study-ready transcript: chapter markers by topic shift, a glossary of technical terms, and flashcard Q/A pairs for review. Covers 99 languages; flashcards and glossary are AI-generated — always verify against source.

Drag and drop your lecture recording

MP3, WAV, M4A, MP4 — up to 2GB. 60-90 minute lectures are typical.

— — — —
Few chapters Many chapters
Q/A pairs and glossary are AI-generated. Treat as a study starting point — verify each card against the transcript before exam use.
Token estimate for this lecture
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Lecture transcript
Chapters
AI-generated study aids
Generating flashcards + glossary...
AI-generated study aids — verify each card against the source transcript before using for exams.

Transcribing lecture...

60-90 min lectures typically take 2-5 minutes — close this tab and we will email you.

Built for students, educators + online-course creators

Study smarter, not longer

Recorded a 90-minute lecture on your laptop? Upload it — get the transcript, chapter markers, a technical-term glossary, and flashcards for active recall in minutes.

Teachers + professors

Record your lecture once, share the transcript + study guide with students who missed it or need accessibility support. One upload = universal access.

Online-course creators

Udemy/Teachable/Thinkific upload: drop the .mp4, export SRT for captions and JSON flashcards for your LMS quiz bank. One file, three revenue uses.

How lecture transcription works

  1. Upload your lecture recording (up to 2GB, ~14 hours).
  2. Adjust chapter sensitivity and keep flashcards on (the default).
  3. Start transcription — for long lectures, check email-when-done and close the tab.
  4. Export study TXT (glossary + flashcards + transcript) or flashcards JSON to import into Anki.

Free.ai vs Otter, Notta, Fireflies

Feature Free.ai Otter.ai (Edu) Notta Fireflies
Price$0.003/min$16.99/mo$13.99/mo$10-18/mo
AI flashcard gen———
Technical glossary———
Topic-shift chaptersManual—Meeting-focused
Languages99English-focused5860+
Anki-ready export———
Sign-up requiredNoYesYesYes
Competitor pricing reflects publicly-listed 2026 tiers.
Advanced options
Result
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Want better results? Premium models (GPT-5, Claude, Gemini) deliver higher quality. View Plans

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Transcribe lectures and classes with free AI. Turn recordings into searchable notes.

How to Use Lecture Transcription

1
Enter your input

Type text, upload a file, or describe what you want. No account needed.

2
Click generate

Our AI processes your request in seconds using the best open-source models.

3
Download & share

Download, copy, or share your result. Free for personal and commercial use.

Use this tool via API

Automate this tool from your own code. OpenAI-compatible REST endpoint, Bearer-token auth, no extra SDK required. Token costs match the web interface.

API Documentation Get API Key 
curl -X POST https://api.free.ai/v1/stt/ \
  -H "Authorization: Bearer sk-free-..." \
  -H "Content-Type: application/json" \
  -d '{"file": "@audio.mp3", "language": "auto"}'

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Lecture Transcription — FAQ

Lecture mode generates chapter markers by silence-gap AND topic-shift detection, extracts key concepts into a glossary of technical terms, and auto-generates flashcard-style Q/A pairs for study. Study aids are LLM-generated — we disclose they should be verified against the source.

Coverage is high (the flashcards touch the major concepts in your lecture) but specifics can hallucinate — we flag this on the result page. Treat flashcards as a starting point and review each one against the transcript before final use.

We run an LLM pass over the transcript looking for pivot phrases ("next, let us talk about...", "moving on to...") and semantic-embedding breaks. The threshold slider lets you tune aggressiveness — low for a densely-packed 90-minute lecture, high for a casual seminar.

Otter has an education tier at 300 minutes free / month but no flashcard generation. We produce the flashcards + glossary + topic-based chapters in one pass.

Notta is $13.99/month for 10 hours. We charge per-minute (~$0.003/min) with no monthly cap. Our AI-study-aid extraction adds ~500 tokens (about $0.00067) per lecture.

Fireflies is built for meetings + sales calls. We generate lecture-specific artifacts (flashcards, glossary) that Fireflies does not offer at all.

Yes — we export flashcards as a JSON array of question/answer pairs. Anki imports JSON/CSV natively — paste into Anki Import from file dialog and map fields.

99 languages on Whisper-large-v3 for the transcription step. The AI study-aid extraction works best in English + major European + CJK languages. Other languages still transcribe, but flashcards may need more manual cleanup.

Up to 2GB — roughly a 14-hour lecture at 128 kbps. Standard 60-90 min lectures come in well under. Use the Heavy-task banner email-when-done option so you can close the tab.

Spoken math ("x squared minus two y") transcribes as text, not LaTeX — you will need to reformat manually. For slide-based math, pair with our /pdf/ocr/ on the slide deck for LaTeX-ready equations.

Yes — the auto-generated summary + concept glossary + flashcards together are a compact study guide. Or feed the transcript into /write/summarize/ for a custom-length version.

Uploaded files are deleted after transcription. Transcripts live in your /account/ for 7 days (paid) / 24 hours (free). For exam-prep where you do not want the audio lingering, download the TXT + delete the row.

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