How to use Digi Certificate Checker
- Start by adding the text you want to check into Digi Certificate Checker.
- Set Paste a digital certificate (PEM) so the output fits your use case.
- Watch the output update instantly while you adjust the text.
- Finish by choosing Copy to take the output with you.
About this tool
There is no server behind Digi Certificate Checker. Digi Certificate Checker decodes a pasted PEM certificate in your browser to read its subject, issuer, validity and serial.
Nothing about the certificate is transmitted. Nothing you enter is uploaded, and it keeps working offline once the page has loaded.
Frequently asked questions
What does Digi Certificate Checker do?
Digi Certificate Checker lets you check your input right in the browser using the Paste a digital certificate (PEM) control, with the result shown instantly and nothing uploaded.
Do I need an account for Digi Certificate Checker?
No — Digi Certificate Checker needs no account, sign-up or installation.
Does Digi Certificate Checker upload my data?
No — Digi Certificate Checker processes everything locally in your browser, so nothing you enter is uploaded or stored.
How do I inspect a live site's certificate with Digi Certificate Checker?
Export the certificate from your browser's padlock as PEM and paste it into Digi Certificate Checker; it decodes the fields locally.
Does Digi Certificate Checker work offline?
Once the page has loaded, Digi Certificate Checker keeps working with no network connection.