Certificate Workbench
Certificate ↔ Key Matcher
Check certificate & key pair
Check whether a certificate and Private Key belong to the same key pair locally.
🔒 Local-only · No upload · No storage
Try an example
TEST ONLY · Public synthetic examples. Never use these keys for real services.
Result
Usage guideWhen to use · How to use · Understand results
When to use this tool
Identify which private key belongs to a certificate when replacing a server certificate or recovering a configuration.
How to use it
- Supply certificate PEM and the private-key PEM in their separate input fields.
- Run the key-pair check and read the match, mismatch or unsupported-format result.
Reading the result
The local check compares public material and verifies a signature challenge. A match does not establish certificate trust or expiry suitability. The key is processed in browser memory.