- 1Choose file
- 2Adjust
- 3Download
SSL & TLS Certificate Inspector online, free
Inspect SSL/TLS certificates, expiry dates, Certificate Authorities (CA), Subject Alternative Names (SANs), and TLS versions.
- Encrypted server job — auto-deleted in 24 h
- Free, no sign-up, no watermark
How to use SSL & TLS Certificate Inspector · SSL & TLS Certificate Inspector — frequently asked questions
How to use SSL & TLS Certificate Inspector
- 1
Fine-tune the settings
The defaults already suit most files; change them only if you need to.
- 2
Run SSL & TLS Certificate Inspector
Press the start button. The file is processed on an encrypted, auto-deleting server job.
- 3
Download the result
Save the finished file, or continue with another tool without downloading in between.
What SSL & TLS Certificate Inspector can do
- Encrypted server processing; files are deleted automatically within 24 hours
- Free with no sign-up, no watermark and no daily limit
SSL & TLS Certificate Inspector — frequently asked questions
What does the SSL / TLS Certificate Inspector test?
The inspector establishes a direct TLS handshake with the specified hostname and port, extracting the server certificate, Certificate Authority (CA) chain, validity timestamps, Subject Alternative Names (SANs), and negotiated cryptographic cipher suites.
How does the tool calculate expiration days?
The tool inspects the certificate's notAfter timestamp and computes the precise number of remaining days and hours relative to the current UTC timestamp, highlighting warnings if the certificate expires in less than 30 days.
What are Subject Alternative Names (SANs)?
Subject Alternative Names (SANs) specify additional hostnames, subdomains (e.g., www.example.com, api.example.com), or wildcard patterns (*.example.com) secured by the single certificate.
Can I test non-standard ports (e.g., 8443 or 9443)?
Yes. Specify the custom port number in the port option input field to audit secure services running on alternative ports.
Does Sada Files log domain names or TLS connection traces?
No. In strict accordance with the Sada Files Privacy Promise, TLS handshakes are stateless and ephemeral. No target hostnames, IP addresses, or certificates are saved.
Related tools
- Security Headers Analyzer & GraderEvaluate and grade website security headers (CSP, HSTS, X-Frame-Options, Permissions-Policy) with actionable remediation advice.
- Website HTTP Headers InspectorInspect complete HTTP response headers, status codes, server signatures, caching directives, and protocol versions.
- File Checksum (MD5 / SHA)MD5, SHA-1, SHA-256 and SHA-512 computed on your device; paste a hash to verify.
- Bcrypt Generator & VerifierGenerate cryptographically secure salted Bcrypt password hashes and verify plaintext passwords against existing hashes.
- Compare Two FilesByte-wise comparison with the first differing offset.
- CRC32 Checksum CalculatorCalculate standard 8-character IEEE 802.3 CRC32 checksums from text strings or binary files.
- CSR Generator & DecoderGenerate Certificate Signing Requests locally or decode existing PEM CSRs.
- HMAC Generator & CalculatorCompute Keyed-Hash Message Authentication Codes (HMAC) using secret keys across SHA-256, SHA-512, and SHA-1.