flac → text · free · no signup
FLAC to text.
Lossless is great for archiving. For a transcript, the model only needs a fraction of it, so that's all we upload.
// short answer
To convert FLAC to text, drop the .flac file into the box above. Your browser downsamples it to 16 kHz mono before upload, which does not change the transcript. Because the result is uncompressed, about 8 minutes fit the free 15 MB cap. Unlimited ($9/month) takes files up to 2 hours and 50 MB, 30 hours of audio a month, no daily limit, with speaker labels.
Updated 2026-09-17
Lossless doesn't buy accuracy
The speech model hears 16 kHz mono no matter what you give it. A FLAC and a decent MP3 of the same recording produce the same transcript. What moves accuracy is the recording: mic distance, background noise, people talking over each other.
How much FLAC fits for free
FLAC is decoded and re-encoded in your browser as 16 kHz mono WAV, about 1.8 MB per minute, so roughly 8 minutes fit under 15 MB. For longer recordings, keep your FLAC archive and upload an MP3 copy:
ffmpeg -i archive.flac -vn -ac 1 -b:a 48k output.mp3What FLAC files usually are
- Archived interviews and oral history. Transcribing them makes the archive searchable.
- Audacity and recorder exports. Common when someone chose lossless to be safe.
- Music. Sung lyrics over instruments transcribe poorly. The model is built for speech.
Free vs Unlimited
| Free | Unlimited | |
|---|---|---|
| Price | $0 | $9/month, cancel anytime |
| Files per day | 3 | No daily limit |
| Longest file | 15 min on screen, 30 min by email | 2 hours |
| Upload size | 15 MB | 50 MB |
| Audio per month | — | 30 hours |
| Speaker labels | No | Yes |
| Account | None | None, Stripe checkout |
FAQ
Can it transcribe song lyrics from a FLAC?+
Not reliably. Singing over instruments confuses speech models, and you should expect missing and invented lines. Spoken word works well.
Why convert to MP3 if FLAC is higher quality?+
Only for the upload. Transcription quality is the same, and an MP3 is several times smaller, so a 30-minute recording fits the free tier. Keep the FLAC as your master.
Are high sample rates like 96 kHz a problem?+
No. The browser resamples to 16 kHz first, so 96 kHz files just take a moment longer to prepare.