Convert FLAC to text
Lossless recordings — field interviews, oral history, studio sessions — transcribed directly, no conversion step.
By Anubhav Jain, Trustample founder · Updated July 2026 · Claims verified against the live product
Free: 60 min per 30 days, files up to 30 min / 50 MB · Paid plans: 10 to 100 hrs, files up to 2 GB. Big video? Upload just its audio track — same transcript, much faster upload.
Encrypted in transit · audio & video auto-delete in 30 days · never used to train AI
Optional settings
Set this for the most accurate result on quiet or mixed audio.
Get a second copy translated into another language (Pro).
Uncommon words the AI might misspell — list them so they come out right.
FLAC is where careful recordings live: field interviews captured on dedicated recorders, oral-history archives, studio sessions — anywhere someone chose lossless because the recording mattered. Trustample transcribes FLAC directly (verified with real files, not assumed), so archival audio goes from folder to searchable text without a conversion step that would defeat the point of keeping lossless masters.
One honest expectation-setter: lossless audio doesn't meaningfully out-transcribe a decent lossy file of the same recording. Accuracy lives in the recording itself — microphone distance, room noise, crosstalk — not the container's bitrate. Keep FLAC for archival integrity; just don't expect it to rescue a recording made from across the room.
How it works
- 1Upload the .flac file directly — no conversion to MP3 or WAV needed.
- 2The AI transcribes it with punctuation and timestamps, in the background.
- 3Verify names against the audio, then export TXT, DOCX, PDF or subtitles.
Frequently Asked Questions (FAQs)
Will FLAC give me a more accurate transcript than MP3?
Marginally at best. Speech models are trained on real-world audio and extract the same words from a 192kbps MP3 as from lossless. What moves accuracy is the recording: mic placement, background noise, how much people talk over each other. FLAC's value is archival, not transcriptional — which is still a fine reason to record in it.
FLAC files are big — will they upload?
An hour of uncompressed FLAC can run past the free plan's 50 MB / 30-minute file cap, so on the free tier upload a shorter clip or a compressed copy; paid plans take files up to 2 GB. On slow connections a compressed copy gets the same transcript faster — keep the FLAC as your master.
Is this suitable for oral-history and archival projects?
Yes — time-stamped transcripts pair naturally with archived audio, speaker labels come on every paid plan, and the uploaded file auto-deletes from our servers after 30 days while your transcripts remain until you delete them. Your FLAC masters stay wherever you archive them; we only ever hold the working copy.
What about other lossless formats — ALAC, WAV?
WAV has its own page and uploads directly. ALAC (Apple lossless, usually in .m4a) also transcribes directly via the M4A path. If a rare container ever fails, one conversion to FLAC or WAV with any free audio tool solves it.
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