Low AI signal
Fewer recognized synthetic-speech patterns.
3 free checks daily · private browser analysis
Free AI Voice Detector
Upload or record a voice clip and get a clear 0–100 AI voice score. This free AI audio detector checks for patterns associated with AI-generated and cloned speech—without uploading the recording. No account is needed for the free daily checks.
✓ Free to use✓ Audio stays on your device✓ Local analysis
Checking your allowance…Each tool has its own allowance · resets at 00:00 UTCView paid plans ↗
VOICE SAMPLE
Upload or record a sample
Drop your audio here
MP3, WAV, M4A, AAC, OGG or WebM · up to 25 MB
or
✓Private on-device analysis
A score you can read at a glance
What your AI voice score means.
The score runs from 0 to 100. A higher number means the clip contains more patterns this AI-generated voice detector associates with synthetic speech. It is a similarity score—not a percentage guarantee.
0100
Mixed signal
The AI audio checker cannot form a clear direction.
Elevated AI signal
Several voice-generation patterns are present.
High AI signal
Strong similarity to audio the model learned as synthetic.
A careful second opinion
A useful signal—not a verdict.
The detector compares short sections of speech with patterns learned from real and synthetic audio. It then combines those readings into an honest confidence band.
Private by design
The model runs locally after it loads. Your audio is decoded and analyzed on your device, not stored on our servers.
More than one moment
Longer recordings are sampled across several sections, so one breath, pause, or noisy second does not decide the result.
Built-in uncertainty
Ambiguous audio is labeled uncertain instead of forcing a confident answer the evidence cannot support.
Before you decide
Listen to the context, too.
Voice detectors can be affected by background noise, compression, music, accents, microphones, and newer synthesis systems. Use the result alongside source history and human review.
- 01Use clear speech
Choose at least four seconds with one main speaker and limited background sound.
- 02Prefer the original file
Repeated downloads, screen recordings, and aggressive compression can remove useful detail.
- 03Never treat a score as proof
A detection score cannot establish authorship or intent on its own.
One check, several real contexts
Use the AI audio detector where origin matters.
Check a clean excerpt before sharing, publishing, moderating, or investigating it. The free voice clone detector works best when speech is the main sound.
Questionable messages
Check whether a suspicious voice note contains signals commonly associated with cloned speech or an AI-generated voice.
Clear single-speaker audio works bestInterviews and social video
Run a short spoken excerpt through the deepfake audio detector before relying on or redistributing the clip.
Use the earliest available source fileVoiceovers and podcasts
Compare narration samples with a consistent 0–100 AI voice score while keeping the final decision with a human reviewer.
Scores can vary across sectionsScreening at first pass
Use the AI speech detector to prioritize recordings that deserve closer provenance checks—not as an automated accusation.
Always review the surrounding evidencePractical guide
Prepare and interpret an AI audio check
Give the AI voice detector a useful speech sample
Use a recording in which speech is the main sound. The tool requires at least two seconds, with four seconds or more preferred, and accepts files up to 25 MB when the browser can decode them. MP3, WAV, M4A, AAC, OGG and WebM support varies by browser and device. The first run also needs time to download the local model.
Start with a clear section from the earliest available recording. Music, repeated re-encoding, denoising, dramatic effects and several overlapping speakers can obscure the patterns the model checks. Do not manufacture a longer sample by looping a short phrase: repeated copies do not add independent evidence. The tool analyzes audio, not a pasted transcript or a video-page URL.
An AI voice check is not speaker verification
An AI voice detector looks for patterns associated with synthetic speech. It does not confirm that a particular person spoke, compare the clip against a verified voiceprint or establish that a message is trustworthy. The words in a real recording can still be edited or presented out of context. Likewise, an uncertain result does not establish that a recording is genuine.
For a questionable voice note, preserve the original and confirm the message through a separately known contact channel. For a narrated article or media clip, inspect the publisher’s disclosures and the source history. In either case, use the score to decide what to review next, rather than making identity or authenticity decisions from the number alone.
Scroll sideways to see all columns.
| Recording condition | Useful next step |
|---|---|
| Very short or mostly silent | Find a longer passage of continuous speech. |
| Music or overlapping speakers | Use a clearer original excerpt if one is available. |
| Mixed or uncertain reading | Review another representative section and retain the uncertainty. |
| Strong synthetic-speech signal | Look for independent source or production information before concluding. |
Questions, answered
Free AI voice detection,
without the fine print.
Is the AI voice detector free?+
Yes. Free users receive 3 voice checks per UTC day without signing in. Basic, Pro and Ultra have unlimited daily uses. Analysis runs locally, and this tool’s allowance is separate from Humanizer word allowances.
Does UltraHumanizer upload my audio?+
No. The page downloads the model, then decodes and analyzes the recording in your browser. The allowance request contains a tool identifier and a request fingerprint, not the recording.
Which audio formats and lengths work?+
Use at least two seconds of clear speech; four seconds or more is preferred. The file limit is 25 MB. MP3, WAV, M4A, AAC, OGG and WebM work when the browser can decode the file; support varies by device.
Can AI voice detection be 100% accurate?+
No. Compression, background noise, accents, music, short clips and unfamiliar voice models can affect the result. The model is best used as an initial signal, especially on clear English speech.
Can a voice detector identify the speaker?+
No. This tool estimates synthetic-speech patterns. It does not authenticate a person’s identity or prove that a message came from a particular speaker. Confirm identity and source information separately.
Why does the first voice check take longer?+
The browser first needs to download and initialize the model. Loading time depends on your connection and device. Keep the tab open until the model and analysis finish.