Open PEM Files Online
PEM is base64 text between BEGIN and END lines. It can hold certificates, certificate chains, signing requests or keys.
Privacy-Enhanced Mail encoding · .pem
What you see in the PEM viewer
- Subject, issuer, validity and days remaining
- Domain names (SANs), key type and size
- Chain order check with root, intermediate and leaf
- SHA-1 and SHA-256 fingerprints
Other ways to open PEM files
Windows
Rename to .crt and double-click, or use OpenSSL.
macOS
Keychain Access imports it; OpenSSL shows details.
Phone & tablet
Use this viewer: phones only offer to install certificates.
Frequently asked questions
Is my PEM file uploaded?
No. The file is read by your browser and shown on your own device. Nothing is sent to a server, and it is gone when you close the tab.
How do I open a PEM file without installing software?
Drop the .pem file on this page. It opens straight away in the SSL Certificate Viewer, on Windows, macOS, Linux, Android and iPhone alike.
What if my PEM file doesn't open?
The viewer checks the file's content, not just its name. If it is damaged or not really a PEM file, you'll see an error or can switch to the hex view to look at the raw bytes.