Certificate Chain Validator
Options
Status
Idle
Validation result
Valid
—
Status label
—
Expired
—
Self-signed
—
Leaf subject
—
Leaf issuer
—
Not before
—
Not after
—
Days until expiry
—
Intermediate count
0
Intermediate subjects
—
About Certificate Chain Validator
This tool validates a leaf certificate against the provided intermediate certificates and the system trust store.
Use it to detect incomplete chains, expired certificates, issuer mismatches, and self-signed certificate issues before deployment.
How to use Certificate Chain Validator
- Paste the leaf certificate PEM into the first field.
- Paste one or more intermediate certificate PEM blocks into the second field if you have them.
- Click Validate chain.
- Review the validation result, status label, expiry details, and intermediate subjects.
Tips
- If the validator reports an incomplete chain, check whether an intermediate certificate is missing.
- A certificate may be structurally valid but still expired.
- Leaf certificates and intermediate certificates should be pasted as PEM blocks.
- Self-signed certificates may be expected in internal or local environments, but not for public websites.
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Certificate Chain Validator FAQ
What does chain incomplete mean?
It usually means the leaf certificate could not be linked to a trusted issuer because one or more intermediate certificates are missing.
Can I validate only a leaf certificate?
Yes, but the result may be invalid if the required intermediate certificates are not available in the trust store.
Does this tool check expiration?
Yes. It shows whether the leaf certificate is expired and how many days remain until expiry.
Can I paste multiple intermediate certificates?
Yes. You can paste multiple PEM certificate blocks into the intermediate chain field.