Developer Tools

GPT Watermarker

Last updated 2026-08-21 · benchmark measured 2026-08-21 — deterministic & reproducible

Tool that removes visible logos, SynthID signals, and C2PA credentials from Gemini images.

Is GPT Watermarker production-ready?

Legit.Show scores GPT Watermarker 80 out of 100 — the simple average of its 7 measured frames. Legit.Show ran its deterministic 7-Frame production-readiness benchmark on GPT Watermarker (public-surface assessment), measured from the public surface with no LLM in the scoring path. Its strongest frame is Reliability; its weakest is Security. Every frame it averages is published with its evidence on the Legit.Show listing.

The 7 Frames

• Performance — 71/100
• Accessibility — 97/100
• Security — 45/100
• Privacy — 75/100
• Reliability — 100/100
• Standards — 89/100
• Discoverability — 85/100

What we measured

• Security headers present: HSTS.
• No Content-Security-Policy.
• Served over HTTPS with a valid certificate.
• Real Lighthouse performance run — 371 ms to first byte.
• Returns a proper 404 for unknown routes.
• 3 of 3 sampled routes reachable.
• Has a reachable privacy policy.
• Sets cookies / loads scripts with no consent prompt.

Who it's for

Designers · Content creators · AI image users · Presentation creators · Portfolio builders

Pricing

Free tier with daily cap for logo removal; credits required for SynthID and C2PA removal; unlimited access on subscription

Visit GPT Watermarker → · Alternatives to GPT Watermarker → · How this was measured →