Certificate Fingerprint Calculator
Calculate SHA-256 certificate fingerprints and hashes.
API & Secret Key Generator
rxd_live_02a990ab0ab7b4df8ba578cc9998e90e
About Certificate Fingerprint Calculator
The SSL/TLS X.509 Certificate Fingerprint Calculator computes SHA-256, SHA-1, and MD5 cryptographic thumbprints from PEM or DER certificates, formatting them with colon separators for HPKP pinning, DNS TLSA records, and security audits.
How to Use Certificate Fingerprint Calculator
Step 1
Paste your PEM certificate or upload a `.crt` / `.cer` / `.pem` file.
Step 2
View calculated SHA-256, SHA-1, and SPKI fingerprints immediately.
Step 3
Select your preferred colon-separated or continuous hex formatting.
Step 4
Click "Copy Fingerprint".
Practical Use Cases for Certificate Fingerprint Calculator
SSL Pinning & Mobile App Security
Generate SHA-256 certificate fingerprints for mobile app SSL pinning configurations in iOS and Android apps.
DNS DANE / TLSA Record Generation
Compute exact certificate hashes required to configure DANE / TLSA DNS records for authenticated email and web transport.
Input & Output Examples
Computing Certificate SHA-256 Fingerprint
PEM Certificate Input
SHA-256: 8F:4B:92:7A:3D:1E:5C:88:9A:2F:70:E1:4B:5A:6D:9C:2B:3F:8A:1E:4D:7B:9A:0F:3C:6E:8D:1A:4B:7C:9D:2E\nSHA-1: 3A:7B:9F:1E:4D:8A:2C:5E:7B:9F:1E:4D:8A:2C:5E:7B:9F:1E
Key Features & Performance
- ✓Calculates SHA-256, SHA-384, SHA-512, SHA-1, and MD5 fingerprints.
- ✓Multiple formatting options: Colon-separated (`AA:BB:...`), Space-separated, Continuous Hex, and Base64.
- ✓Computes SPKI (Subject Public Key Info) SHA-256 hash for public key pinning.
- ✓100% Client-Side memory execution.
- ✓1-Click Copy fingerprint.
Key Terminology & Definitions
Certificate Fingerprint (Thumbprint)
The cryptographic hash of the entire binary DER-encoded certificate, uniquely identifying the certificate across systems.
SPKI Fingerprint (Subject Public Key Info)
The SHA-256 hash computed specifically over the public key structure rather than the entire certificate, allowing certificate renewals with the same key without breaking pinning.