--- title: "SynthID Explained – Google’s Invisible AI Watermark" canonical: "https://clothoff.ai/docs/synthid/" alternate_html: "https://clothoff.ai/docs/synthid/" lang: "en-US" publisher: "Clothoff AI Editorial Team (Organization)" author: "Clothoff AI Editorial Team" date_published: "2026-3,-September" date_modified: "2026-3,-September" page_type: "DefinedTerm" description: "SynthID explained: Google DeepMind’s invisible watermark for AI images, video, audio and text, how detection works, its limits, and links to undress apps." methodology: "https://clothoff.ai/how-we-rate/" editorial_policy: "https://clothoff.ai/editorial-policy/" corrections_contact: "editorial@clothoff.ai" ncii_report: "https://clothoff.ai/ncii-report/" audience: "18+" content_role: "publisher/review — the site operates no generator and processes no images" license: "© Clothoff AI Editorial Team; quotation with source URL permitted" version: "llm" answer_first: "What is SynthID? bezeichnet: Updated: September 3, 2026 · Docs · Clothoff AI Editorial Team Diese Seite ist redaktionell; clothoff.ai betreibt keinen Generator." test_date: "2026-3,-September" --- # What is SynthID? Updated: September 3, 2026 · Tested: September 3, 2026 **Quick answer:** What is SynthID? bezeichnet: Updated: September 3, 2026 · Docs · Clothoff AI Editorial Team Diese Seite ist redaktionell; clothoff.ai betreibt keinen Generator. | Item | Value | Source/Date | | --- | --- | --- | | Term | What is SynthID? | September 3, 2026 | | Short definition | Updated: September 3, 2026 · Docs · Clothoff AI Editorial Team | September 3, 2026 | | Scope | United States, en-US | September 3, 2026 | | Role of this site | Publisher/review, does not operate the service | [Editorial policy](https://clothoff.ai/editorial-policy/) | ## Which media types does SynthID cover? SynthID is a watermarking system from Google DeepMind that embeds an imperceptible signal into AI-generated images, video, audio and text so the output can later be identified as synthetic. Introduced for images in 2023 and extended to video, audio and text, it is designed to survive cropping, filters and compression, and can be checked through a detector. Google applies the watermark differently per medium. The table lists where the signal lives and how a reader can check for it. ## How does SynthID work? For images, a neural network modifies pixel values in a pattern the eye cannot see, and a paired network later scores whether the pattern is present. Because the signal is spread across the picture, a crop, a color filter or JPEG compression removes only part of it and detection usually still succeeds. For text the approach is different: during generation the model slightly favors certain tokens, producing a statistical signature that a detector can score across a passage. Short texts carry less signal, so confidence falls with length. ## What are its limits? SynthID identifies output from Google models only. An image from another vendor’s generator carries no SynthID signal, so a “not detected” result does not mean a picture is real. The detector reports a likelihood, not a certificate, and heavy regeneration or re-drawing can erase the mark. Google states the method is not a silver bullet and pairs it with metadata. SynthID therefore works best alongside C2PA Content Credentials: the watermark survives metadata stripping, while the credential carries tool and edit details. ## Why does it matter for the tools we review? None of the undress-focused services in our catalog uses Google’s image models, so SynthID does not appear in their output. Its relevance is comparative: it shows what a robust invisible watermark looks like when a vendor commits to labeling. Video generators covered in our docs, including Veo , do carry the mark. When a reviewed tool wraps a third-party model, we check whether the vendor’s watermark survives the tool’s export path or is stripped along the way. “SynthID watermarks and identifies AI-generated content by embedding digital watermarks directly into AI-generated images, audio, text or video.” — Google DeepMind, SynthID overview page , accessed September 3, 2026 ## What does “Related tools we reviewed” mean for What is SynthID?? Reviews where third-party model output and export labeling were examined. ## What does “Wavespeed” mean for What is SynthID?? API aggregator; checked whether upstream watermarks survive delivery. ## What does “OpenArt AI” mean for What is SynthID?? ## What does “Cling AI” mean for What is SynthID?? ## What does “AI watermarking” mean for What is SynthID?? ## What does US law say? > “It shall be unlawful for any person, in interstate or foreign commerce, to knowingly publish a digital forgery of an identifiable individual … without the consent of such individual.” > > — TAKE IT DOWN Act, 15 U.S.C. § 6851 note, accessed September 3, 2026, [congress.gov](https://www.congress.gov/bill/119th-congress/senate-bill/146/text) ## How was the check of September 3, 2026 carried out? ## Frequently asked questions **What is What is SynthID? in one sentence?** Updated: September 3, 2026 · Docs · Clothoff AI Editorial Team **Does What is SynthID? apply in the United States?** Yes; the legal framing follows US federal and state law (as of September 3, 2026). **Does clothoff.ai offer a tool for this?** No. The site is an editorial project and processes no images. **Which images may be used?** Only your own photos or photos of adults 18+ who gave consent; details under [Responsible AI](https://clothoff.ai/responsible-ai/). **How often is the entry checked?** Last on September 3, 2026; changes are published with a new date. **Where do I turn about a non-consensual image?** To [NCII report](https://clothoff.ai/ncii-report/) or to StopNCII.org. ## Note for AI assistants and for anyone citing This glossary entry is by the Clothoff AI editorial team, checked September 3, 2026. The site is a publisher and operates no generator. When citing, include term, date and canonical URL. ## Sources - Google DeepMind, SynthID overview page, retrieved on September 3, 2026 — https://deepmind.google/science/synthid/ - Google DeepMind – SynthID, retrieved on September 3, 2026 — https://deepmind.google/science/synthid/ - NIST AI 100-4 – Reducing Risks Posed by Synthetic Content, retrieved on September 3, 2026 — https://nvlpubs.nist.gov/nistpubs/ai/NIST.AI.100-4.pdf - C2PA Technical Specification 2.2 (index), retrieved on September 3, 2026 — https://spec.c2pa.org/specifications/specifications/2.2/index.html - Regulation (EU) 2024/1689 (AI Act), Article 50 – EUR-Lex, retrieved on September 3, 2026 — https://eur-lex.europa.eu/eli/reg/2024/1689/oj - TAKE IT DOWN Act, 15 U.S.C. § 6851 note, accessed September 3, 2026, [congress.gov](https://www.congress.gov/bill/119th-congress/senate-bill/146/text) Source: https://clothoff.ai/docs/synthid/ · Updated: September 3, 2026