Ratproof

Your recording never leaves this computer.

Free transcription that runs on your own machine. Nothing uploaded, nothing installed, no account.

Content-Security-Policy: connect-src 'self'

The tool ships with that header on every page. Your browser reads it and blocks the upload. Press F12 and check before you trust us.

0 bytes of your recording ever sent
Unlimited no cap, no account, no card
30 seconds to check the claim yourself
Open Ratproof Drop in a file. That's the whole sign-up.

What it's like

Drag in an mp3, wav, m4a, ogg, flac or webm. Text starts showing up in about fifteen seconds, timestamped, and pressing a line jumps the audio there.

When it's done you also get the transcript's most distinctive lines pulled out word for word, and — if your browser carries its own language model — a written summary of decisions and to-dos, labelled as generated text and checked against your transcript. Export as text, Markdown, SRT, VTT or JSON. No watermark, no export behind a paywall.

How accurate it is

On real, overlapping meeting audio we measured 27.4% word error rate — most of it words nobody could have caught, because two people were talking at once. About 87% of what lands on the page matches the human transcript, and one person near a microphone does considerably better. Every number, including the ones that don't flatter us

What it costs you

Your machine does the work instead of ours, so it takes longer than a cloud service and wants more memory. That's the trade: their speed, for keeping the recording to yourself. Every figure is published here.

Open Ratproof Free, unlimited, working the moment you drop a file in.