PEM Viewer
View the internal structure of a PEM block (key/certificate). Paste your data, then click to dissect it. Everything runs on your device, nothing is sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
-----BEGIN PRIVATE KEY-----…
Example Output
ASN.1 structure of the PEM block
How to Use
- 1Paste your data (PEM/Base64/token) into the Input field.
- 2Click the button (or press Ctrl+Enter) to dissect it.
- 3Read the decoded result in the Output field.
About PEM Viewer
PEM is a text wrapper (a "-----BEGIN…-----" header + Base64) around binary DER data. The PEM Viewer unwraps it and shows the ASN.1 structure inside.
It is useful for inspecting public/private keys and certificates in PEM format without command-line tools. The tool processes everything in the browser.
For raw DER input (Base64/hex without PEM headers), use the DER Viewer. For high-level certificate details, use the X.509 Certificate Viewer.
FAQ
Are my data or keys sent to a server?
No. PEM Viewer runs entirely in your browser using the Web Crypto API and client-side libraries. Your data, passwords, and keys never leave your device.