How to use SSL Checker (Namecheap)
- Give SSL Checker (Namecheap) a PEM certificate to work from.
- Press Parse certificate to run it locally in your browser.
- Read the subject, issuer, validity dates and expiry that SSL Checker (Namecheap) lays out for you.
About this tool
SSL Checker (Namecheap) is a static, client-side tool with no backend. SSL Checker (Namecheap) decodes a pasted PEM certificate by walking its ASN.1/DER structure locally to read subject, issuer, validity window and serial.
The expiry countdown is computed locally, and nothing about the certificate is transmitted. Your input never leaves the page, and no account or install is required.
Frequently asked questions
How do I use SSL Checker (Namecheap)?
Use SSL Checker (Namecheap) to check your input without installing anything; everything happens client-side.
Is SSL Checker (Namecheap) free to use?
Yes — SSL Checker (Namecheap) is completely free, with no usage limits.
Is my input private in SSL Checker (Namecheap)?
Yes — your input never leaves your device; SSL Checker (Namecheap) does all the work in your browser.
How do I inspect a live site's certificate in SSL Checker (Namecheap)?
Export the certificate from your browser's padlock as PEM and paste it into SSL Checker (Namecheap); it decodes the ASN.1/DER fields entirely on your device.
Does SSL Checker (Namecheap) work offline?
Once the page has loaded, SSL Checker (Namecheap) keeps working with no network connection.