openai.com · Integrity & Detection
OpenAI's free checker and Content Provenance API that look for its SynthID watermarks and C2PA data in images and audio made with ChatGPT, Codex or the API.
OpenAI Content Verification is one of 9 integrity and detection tools on TrueIQ. See all integrity and detection tools or how we check facts.
// guides
Does ChatGPT have a watermark? In the EU, yes: OpenAI's textGrain hides a pattern in word choices. How it works, who can detect it, and what it can't prove.
AI model fingerprinting embeds ownership signals in LLMs. How the Fingerprinting Leaderboard works, SaTML 2026 findings, and how it differs from SynthID.
Google's SynthID Detector is now open to everyone. How to check images, video and audio for its AI watermark, what results mean, the limits, and alternatives.
// related
SynthIDdeepmind.googleGoogle DeepMind's invisible watermark for AI images, video, audio and text. Files can be checked in the SynthID Detector portal, open to all since October 2026, or in Gemini.Integrity & DetectionFree
Content Credentials Verifycontentcredentials.orgFree web tool that reads C2PA Content Credentials in a file and shows its signed provenance history, including whether AI tools were used to create or edit it.Integrity & DetectionFree
Pangrampangram.comAI text detector for educators and publishers that estimates how much of a document was AI generated, with a free daily word allowance and paid plans.Integrity & DetectionFreemiumHN 5
GPTZerogptzero.meAI text detector used by educators to estimate whether writing was produced by language models, with writing reports.Integrity & DetectionFreemium
Turnitinturnitin.comLong standing academic integrity platform offering similarity checking, AI writing indicators and feedback tools for schools.Integrity & DetectionPaid
Originality.aioriginality.aiAI content and plagiarism checker aimed at publishers and content teams.Integrity & DetectionPaid