Reference library
Guides to media provenance and AI content checks
Plain-language guides on verifying image origin, reading Content Credentials, removing EXIF data, and why AI detectors get people wrongly accused. Each guide links to the specific tool that runs the check it describes.
Verification method
How to tell if an image is AI-generated
A practical, honest method for checking whether an image was generated by AI: what provenance can prove, what metadata hints at, why visual tells fail, and when to stop.
Read the guide →Provider marking
Does ChatGPT watermark the images it generates?
What OpenAI attaches to generated images, why the marking disappears so easily, and how to check any specific image yourself instead of relying on a general claim.
Read the guide →Provenance explained
What are Content Credentials?
Content Credentials explained without jargon: what they record, how the signing and binding work, what they prove, what they do not prove, and why they disappear so easily.
Read the guide →Why the tells fail
The supposed signs that text was written by AI
Em dashes, hidden characters, 'delve', and clean formatting are widely cited as AI tells. Here is why each one fails, and what actually distinguishes machine-written text.
Read the guide →Privacy how-to
How to remove EXIF data before you share a photo
Remove GPS coordinates and camera metadata from photos on iPhone, Android, Windows, and macOS — and understand which sharing paths strip data automatically and which do not.
Read the guide →Reading the numbers
How accurate are AI detectors?
What AI detector accuracy claims actually mean, why base rates make a 95% accurate tool produce mostly false accusations, and who the errors fall on.
Read the guide →Run a check yourself
Every tool runs in your browser. No upload, no account, no stored history.
Free C2PA Checker for Images
Open an image locally to check whether it carries a C2PA manifest, whether that credential validates, and which creation or editing actions it declares.
Content Credentials Checker
Content Credentials are the consumer-facing name for C2PA provenance.
AI Watermark Checker
There is no universal AI watermark and no honest way to compute an AI percentage from pixels.
AI Image Metadata Checker
Some AI tools leave their name in ordinary metadata.
EXIF Viewer
Read the complete metadata record of a photo — camera body, lens, exposure settings, capture time, editing history, and location — without sending the file anywhere.
Hidden Character Checker
Paste text to reveal characters that occupy no visible space but change how the text behaves.
Invisible Character Remover
Paste text, remove the invisible characters that break search, comparison, and parsing, and copy the clean result.
Claude Watermark Checker
This page checks pasted text for directly observable invisible characters.
Does Claude Watermark Text?
The short answer: there is no official, publicly available Claude text watermark detector, and hidden Unicode characters are not evidence of one.
SynthID Checker
SynthID is not an EXIF tag or a C2PA manifest, and it cannot be read by a third-party web page.