Terms of Service

Effective date: 2026-07-06

crtlog is a free tool that lets you search certificates published in public Certificate Transparency logs.

The short version

The service is provided as-is, with no warranty.
The data comes from public CT logs; we make no guarantees about accuracy, completeness, or availability.
Do not use this service to build a competing service or to scrape our database in bulk.
Do not use this service for any illegal purpose.
We can revoke your access for any reason, with or without notice.
We can change these terms at any time. The updated version will be posted here with a new effective date.
We do not sell your data, share your data, or use your data for advertising.

Use limits

Anonymous users may make up to 20 searches per day and at most one search every 5 seconds. Higher limits are available with a free API key. See the search page for details.

Abuse reporting

If you believe a user is abusing the service or using it for illegal purposes, email with the relevant details. We review all reports and act within 7 days.

Children's privacy

We do not believe a dedicated children's section is necessary for a public search index, but we do not knowingly collect personal data from users under 16. If you have concerns, email .

Governing law

These terms are governed by the laws of France and, where applicable, the general principles of European Union law. Any disputes will be handled in the courts of France.

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