Certificate Workbench

PEM Inspector

Identify unfamiliar PEM data

Paste unfamiliar PEM data to identify certificates, requests and keys locally.

🔒 Local-only · No upload · No storage

Try an example

TEST ONLY · Public synthetic examples. Never use these keys for real services.

Advanced information / extensions

Inputs and results are cleared when edited, cleared or when leaving this page. Copy and file saving happen only when you request them.

PEM text only · up to 1 MiB, 20 blocks, 128 KiB per block. DER, PFX/PKCS#12, JKS and encrypted keys are not supported in v1.

RSA PKCS#8 / PKCS#1 and EC PKCS#8 / SEC1 (named P-256, P-384, P-521). Encrypted keys are not supported.

Usage guideWhen to use · How to use · Understand results

When to use this tool

Identify unfamiliar PEM blocks before deciding whether to inspect a certificate, request or key.

Paste PEM text or read a supported local text file.
Inspect each block’s type and available details, then choose the dedicated inspector for deeper analysis.

PEM is an envelope for several data types, not a trust label. Encrypted keys and binary containers such as PFX are outside the supported input scope.