How to Fix SSL Error in Postman Quickly and Easily

To fix an SSL error in Postman, disable SSL certificate verification in the settings or add the correct SSL certificates. This allows Postman to trust the server and avoid connection failures caused by invalid or self-signed certificates.

Why This Happens

SSL errors in Postman occur because Postman cannot verify the server's SSL certificate. This often happens when the server uses a self-signed certificate or an expired/invalid certificate. Postman blocks the connection to keep your data safe.

javascript

const https = require('https');

https.get('https://self-signed.badssl.com/', (res) => {
  console.log('Status Code:', res.statusCode);
}).on('error', (e) => {
  console.error('SSL Error:', e.message);
});

Output

SSL Error: self signed certificate

The Fix

Go to Postman settings and turn off SSL certificate verification. This lets Postman accept self-signed or invalid certificates. Alternatively, add the server's SSL certificate to Postman's trusted certificates if you want to keep verification on.

Prevention

Always use valid SSL certificates from trusted authorities on your servers. Keep certificates updated and avoid self-signed certificates in production. Regularly check Postman's SSL settings before testing to prevent errors.

• Use certificates from recognized Certificate Authorities (CAs).
• Renew certificates before they expire.
• Enable SSL verification in Postman for secure testing.

Related Errors

Other common SSL-related errors include:

• SSL Handshake Failed: Caused by protocol mismatches or unsupported cipher suites.
• Certificate Expired: The server's certificate is no longer valid.
• Hostname Mismatch: The certificate does not match the server's domain.

Fixes usually involve updating certificates or adjusting Postman settings similarly.

Key Takeaways

Disable SSL certificate verification in Postman to bypass SSL errors during testing.

Use valid, trusted SSL certificates on servers to avoid SSL errors.

Keep SSL certificates updated and renew them before expiration.

Add server certificates to Postman's trusted list if you want verification without errors.

Check Postman SSL settings before API testing to prevent connection issues.