Deterministic measurements
Surface patterns, compression, structure, and frequency—not black-box scores.
Free public beta · No account needed
Could it be AI? Look closer.
Check writing, images, websites, audio, and video. Get an explanation of what stands out, what could explain it, and what to check next.
Local files stay on your deviceResearch sharing is your choice
Analyze privately
Start a text review
Paste or open a document, then analyze. You can optionally select its type for a more specific comparison.
Add your writing
Paste it below or choose one local file. A selected file is extracted in browser memory for your review before analysis.
No text handy?Illustrative AI-written sample, not an accuracy test.
Use this when no more specific type applies.Get observations and measurements without assuming a genre.
Open a document or scan paper pages
Ready to review?
Your evidence report
Results will appear here
Ready when you are
Add writing on the left, choose its document type, and select Analyze privately.
Patterns are clues, not proof of AI use. CouldItBe does not provide a verified authorship verdict or AI percentage. How to read a result →
Evidence in both directions
Every finding keeps supporting observations beside contradictions and counterexamples.
Uncertainty stays visible
Provenance checks, missing evidence, and limitations are never hidden behind a verdict.
Five ways to inspect
Choose what to inspect.
Choose a format to begin. Each report explains what was measured, what stands out, and what the evidence can support.
About research maturity
All five analyzers are operational. Maturity labels describe research depth—not whether a tool works. Research maturity requires independent-source, counterexample, frozen-candidate, untouched prospective, and independent-review checks.
01Operational betaResearched research maturity — Researched evidence analyzer
Text Evidence Analyzer
Paste, open, or locally scan writing. The bounded long-form pattern rule has source-grouped research and counterexample testing; it still cannot determine authorship.
Analyze text02Operational betaEarly forensic research maturity — Development evidence collected; independent-source and prospective evaluation remain incomplete
Image Evidence Analyzer
Measure compression, repetition, texture, color, frequency, edges, metadata, and Content Credentials locally. Development and transformation testing is underway; this is not an origin detector.
Inspect an image03Operational betaTransient research maturity — Operationally tested, transient page evidence—not an origin study
URL Evidence Analyzer
Review one public page’s visible-text patterns, declared metadata, and structure through bounded retrieval. Retrieval security is extensively tested; the discarded page body is never treated as authorship proof.
Inspect a URL04Operational betaEarly forensic research maturity — Development evidence collected; independent production categories and prospective evaluation remain incomplete
Audio Evidence Analyzer
Inspect WAV, MP3, and M4A level, dynamics, silence, clipping, frequency, and container measurements locally. Research still needs broader independent human, generated, mixed, and transformed audio.
Inspect audio05Operational betaEarly forensic research maturity — Validation infrastructure is mature; independent-source evidence and prospective evaluation remain incomplete
Video Evidence Analyzer
Inspect MP4 and WebM frame texture, luminance, clipping, repetition, transitions, and container evidence locally. Secure validation is operationally mature, but origin-relevant research remains early.
Inspect videoResearch, volunteer studies, and how contributions are used
Help test CouldItBe
Useful testing.
Minimal collection.
Run material you are authorized to use. Review the result. Optionally contribute only derived measurements and an unverified source label. Analyzer source text or media is never included.
Adult writing study
Write a short assigned paper in the browser and capture privacy-minimized drafting checkpoints.
Participate in the writing studyAudio research study
Contribute an authorized human, AI-generated, or mixed-production recording for private research review.
Participate in the audio studyVideo research study
Adults can check an authorized MP4 or WebM locally while private volunteer intake remains closed. Videos will never be published or publicly playable.
Review the Video studyStudy records are voluntary and privately reviewed. Each study page explains its current submission status. Research review states are evidence, not authorship or origin verdicts.
Verified research evidence
Source-grouped records that satisfy a frozen study contract.
Controlled synthetic evidence
Known fixtures used to test mechanics, privacy, and failure handling.
Self-declared beta feedback
An optional expectation that remains unverified and is never treated as ground truth.
Operational bug reports
Content-free reports that improve reliability, access, and clarity.
