How to use SSL Expiry Checker
- Drop your text into the field at the top of SSL Expiry Checker.
- Adjust the Paste a certificate to check its expiry option to match what you need.
- Watch the output update instantly while you adjust the text.
- When it looks right, Copy to save it.
About this tool
Everything SSL Expiry Checker does happens on your own device. SSL Expiry Checker parses the X.509 fields of a certificate you paste, locally.
Nothing about the certificate is transmitted. Your input never leaves the page, and no account or install is required.
Frequently asked questions
What is SSL Expiry Checker for?
SSL Expiry Checker lets you check your input right in the browser using the Paste a certificate to check its expiry control, with the result shown instantly and nothing uploaded.
Is SSL Expiry Checker free to use?
Yes — SSL Expiry Checker is completely free, with no usage limits.
Is my input private in SSL Expiry Checker?
Yes — your input never leaves your device; SSL Expiry Checker does all the work in your browser.
How do I inspect a live site's certificate with SSL Expiry Checker?
Export the certificate from your browser's padlock as PEM and paste it into SSL Expiry Checker; it decodes the fields locally.
Does SSL Expiry Checker work on mobile?
Yes — SSL Expiry Checker is just a web page and runs on any modern browser, including phones and tablets.