SSL Certificate Creator
Create self-signed SSL certificates for free
Features
Instantly generate self-signed certificates
Output the certificate, private key, and CSR all at once without a certificate authority
Choose key length and signature method
Supports 2048/4096 bits and four methods such as SHA-256
Set validity from 1 to 10 years
Flexibly set the certificate's expiry to match your testing needs
Download three formats on the spot
Copy and save the private key, certificate, and CSR in separate tabs
How to use
Enter the certificate's issuance details
Enter the target's details such as the common name (domain name), organization name, and country code
Specify key length and signature method
Choose the key size, signature algorithm, and validity period from the dropdowns
Create the certificate with the generate button
Press the generate button to create the certificate, private key, and CSR in the browser
Get the content from each tab
Copy or download from the private key, certificate, and CSR tabs
Use cases
Verify local HTTPS
Quickly prepare a certificate to check HTTPS communication in a development environment
Prepare to build a test environment
Assign a provisional certificate to a staging or internal verification server
Prototype a CSR template in advance
Check the field layout and entered values of a CSR before applying for a formal certificate
As SSL learning material
Use in training and hands-on sessions to learn the structure of certificates, private keys, and CSRs
Safety and privacy
Runs entirely in your browser
Your input data is processed only within your browser and is never sent externally.
Processing only in your browser
certificate and key generation is processed entirely within your browser, and input data is not sent to any server.
Communications encrypted with HTTPS
Page loading is also encrypted by TLS, and content cannot be read by third parties.
No transmission to third parties
Input content is not sent to external services such as ad networks or trackers.
No automatic saving of results
the private key you generate and input suggestions are not stored on the server.