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PKI Toolkit — Keys and Certificates in the Browser

Generate RSA keys, a self-signed CA, server/client certificates, and CSRs locally, and parse PEM. Useful for local HTTPS without installing OpenSSL.

Quick switch→RSA Key Generator
CertificatePKIRSA
Quick switch:RSA Key GeneratorSSL Certificate ParserHash Generator

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Use cases

  • Quick self-signed HTTPS for local dev
  • Create a CA and issue server/client certs
  • Generate a CSR for a real CA
  • Inspect PEM certificates
  • Generate RSA key pairs

How to use

  1. Generate an RSA key pair
  2. Create a self-signed CA
  3. Issue a server cert with SAN (CA-signed or self-signed)
  4. Paste PEM to inspect details

Example input and output

Flow

CA + server cert issuance

Output

ca_cert.pem + server_cert.pem + server_key.pem

FAQ

OK for production?

Self-signed certs are for testing. Use Let’s Encrypt or a commercial CA in production.

Are keys uploaded?

No. Generation and signing stay in the browser.

Which key sizes?

1024 (test only), 2048 (recommended), and 4096 (higher security).

How do I CA-sign a server cert?

Generate the CA first, then choose “Sign with CA” and import the CA cert and key.

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