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SSL Certificate Checker

Check a domain's TLS certificates via public Certificate Transparency logs — issuer, validity window and expiry warning.

About this tool

Check a domain's TLS certificates via public Certificate Transparency logs — issuer, validity window and expiry warning. Apaltools tools are free, require no signup, and run entirely client-side — your input never leaves the browser, which makes it safe even for sensitive strings such as tokens or internal URLs.

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