AI speech redaction online
Automatically detect, review, and bleep or silence spoken personal information in call recordings, interviews, and voice notes—with interactive word-level transcript and waveform controls. Works with MP3, M4A, WAV, FLAC, OGG, and Opus recordings.
About 3 credits per minute. 10 free credits a day
Millisecond word alignment
Microsoft MAI-Transcribe-2 timestamps every spoken word, with automatic safety padding and smooth fades around each bleep.
Transcript + waveform editing
Toggle AI findings in one click, add custom terms under Always redact, or drag directly on the audio timeline to cover mumbled speech and crosstalk.
Clean re-encoded output
Your browser replaces sensitive speech samples with a 1 kHz tone or silence and saves a fresh audio file stripped of ID3 and MP4 metadata.
How speech redaction works
- 01
Open your voice recording
Audio is decoded in your browser and prepared for word-level speech recognition.
- 02
Review detected spoken PII
Click any highlighted word in the transcript to toggle its bleep, or drag across the waveform to mark more.
- 03
Export redacted audio & transcript
Download your bleeped or silenced audio file along with a matching masked transcript.
Why word-level ASR + LLM beats black-box speech redaction
Spoken language rarely follows the neat patterns of written text—callers pause mid-number, spell names out loud, and talk over one another.
Conversational numbers & spelling
LLM detection on word-timed transcripts catches phone and card numbers read in groups as well as phonetically spelled emails and usernames.
Context-aware filtering
Surrounding conversation separates a caller’s private mobile number or birth date from public helpline numbers and appointment times.
Human-in-the-loop review
Unlike one-shot speech redaction APIs that permanently bleep false positives, you can preview every match by ear and adjust ranges on the timeline before exporting.
Frequently asked questions
What is speech redaction?
Speech redaction is the process of removing spoken personally identifiable information (PII)—such as names, payment card numbers, addresses, and dates of birth—from an audio recording by replacing those exact time intervals with a bleep tone or silence.
How is AnyRedact different from automated speech redaction APIs?
Black-box APIs return an already-bleeped audio file, giving you no way to undo false positives or bleep mumbled words the speech model missed. AnyRedact pairs word-level ASR and LLM detection with an interactive timeline and transcript editor so you can verify and fine-tune every bleep before downloading.
Can I download a redacted transcript along with the audio?
Yes. After reviewing your recording, you can download both the redacted audio file (with bleeps or silence) and a matching text transcript with sensitive words masked or replaced with labels like [NAME].