PEM Bundle Inspector
Inspect a mixed PEM bundle, identify every contained object, preserve block order, and detect sensitive private-key material.
PEM bundle input
Paste a PEM bundle or upload a text-based PEM file. Object order is preserved.
PEM bundle analysis
Identify every object inside a mixed PEM file
PEM bundles can contain certificates, private keys, public keys, certificate requests, revocation lists, and PKCS#7 or CMS data in a single text file.
What this tool detects
The inspector identifies common PEM labels, preserves the original block order, counts contained objects, and highlights certificates, keys, CSRs, CRLs, and PKCS#7 or CMS containers.
Handle private keys carefully
Private keys are sensitive even when stored in a bundle with public certificates. Analyze them only in a trusted browser environment and never share production key material.
Guide
About PEM Bundle Inspector
PEM files can contain multiple cryptographic objects in a single text bundle.
This inspector identifies each block, preserves order, and highlights sensitive private-key material.
Object identification does not necessarily validate the internal cryptographic structure of every block.
Common PEM objects
Mixed bundles may include several object types.
- Certificates
- Private keys
- Public keys
- Certificate requests
- CRLs
- PKCS#7 or CMS data
Block order
Order matters for some server configurations and certificate-chain bundles.
Sensitive material
Private-key blocks should be removed from files that are meant to contain public certificates only.
PEM labels
BEGIN and END labels describe the intended object type, while the Base64 body contains DER-encoded bytes.
FAQ
Frequently asked questions
Can one PEM file contain multiple certificates?
Yes. Certificate chains are often stored as multiple PEM certificate blocks.
Can a PEM bundle contain a private key?
Yes, which is why bundles must be reviewed before sharing.
Does block order matter?
It can matter for certificate chains and server configuration.
What does the PEM label mean?
It identifies the expected object type wrapped by the Base64 data.
Can the tool split a bundle?
It can identify individual blocks so they can be reviewed or handled separately.
Is the bundle uploaded?
Inspection is intended to occur locally in your browser.
Continue exploring
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