Certificate Workbench
CSR Builder
Generate a Private Key & CSR
Generate a new Private Key and CSR entirely in your browser.
🔒 Local-only · No upload · No storage
Try an example
Example .test domains only. Generate creates a fresh key pair in your browser.
Result
Usage guideWhen to use · How to use · Understand results
When to use this tool
Generate a new key pair and CSR when requesting a certificate for DNS names.
How to use it
- Enter Common Name, SANs and optional organization fields, then choose a supported key algorithm. Example filling does not generate a key.
- Generate, review the CSR, and explicitly save the private key somewhere safe before leaving the page.
Reading the result
Each generation creates a fresh key in the browser. Send the CSR to the issuer, not the private key. Yoonadev cannot recover the key after the page is closed.