Vendor tools are useful for checking their own watermarks and provenance signals, but coverage, sign-in requirements, and watermark strength differ. Understand what each one confirms before handing an original file to another provider.
If you need to know whether a file carries a specific vendor signal, go to that vendor. If you do not yet know where the signal came from, start with GenDetect for cross-vendor triage.
Official tools depend on metadata or watermarks, and screenshots, transcodes, and recompression can weaken those signals. Save the original file and its source link before uploading. A platform copy is not the best evidence.
A C2PA manifest or watermark shows that a supported signal is present. It does not prove the content is accurate, unedited, or presented in the right context. Likewise, a missing signal is not proof of human authorship.
Each tool is operated by its vendor, and its terms, sign-in requirements, and file limits apply. External links open in a new tab so the current GenDetect result stays available.
Checks images and audio generated or exported by OpenAI tools for OpenAI C2PA manifests and SynthID watermarks. It does not detect other vendors, and it may not cover older or heavily processed OpenAI content.
Open OpenAI VerifyChecks images, video, and audio for SynthID watermarks from Google and partners including OpenAI, NVIDIA, and Kakao, with Apple support still rolling out. Sign-in with Google, Apple, or ChatGPT is required, and files are limited to about 100MB.
Open SynthID DetectorChecks Microsoft-issued C2PA manifests and watermarks in images, audio, and video up to 100MB. It covers Microsoft AI systems only and cannot identify content generated by another vendor.
Open the Microsoft checkVerifies the signature chain, signer, and edit history of cross-vendor C2PA Content Credentials. It is not an AI detector, does not read SynthID or other watermarks, and cannot prove human authorship just because credentials are absent.
Open Content Credentials VerifyUse these entry points as supporting evidence, not as a final verdict. The limits below apply to most vendor-run detectors.
OpenAI and Microsoft cover their own systems, Google covers Google and selected partners, and Content Credentials verifies C2PA only. A negative result means that no supported signal was found, not that the content is human-made.
Cropping, compression, screenshots, and transcoding can reduce watermark detectability, and vendors acknowledge that heavy cropping or legacy content may be missed. Meta Content Seal was reported to miss cropped images and covers only its own model, so it is not listed as a fixed entry point here.
Official checks require uploading the file to the vendor, and some tools require sign-in. Retention, purpose, and cross-border processing are governed by that vendor’s privacy terms. Review them for sensitive material, or use only the necessary cropped portion.
GenDetect does not replace any official entry point. It gathers source clues on one page so you can decide which vendor check, if any, comes next.
A GenDetect check reads generator metadata, local C2PA provenance, and enabled model signals, then displays source evidence, the screening index, and coverage limits separately. No account is currently required, and the interface is available in Chinese and English.
GenDetect cannot decode proprietary watermarks such as SynthID or Content Seal, and it does not claim to produce vendor-level conclusions. Keep the original file and use the matching official tool when a specific watermark matters; GenDetect is for cross-vendor triage and evidence organization.
Image checks read generator declarations and provenance clues. If the result points to OpenAI or Google, take the original image to the matching official tool to check for a watermark. Metadata can be added or removed, so one result cannot prove origin alone.
Open the AI image detectorVideo checks analyze at most six sampled frames and do not inspect audio or full temporal continuity. To check a video watermark, use the original video file with a video-capable official tool; GenDetect sampling is only an initial screen.
Open the AI video detector