Are UtiliTools really 100% free?

Yes, all 115+ tools on UtiliTools are completely free with no hidden costs, no premium plans, and no usage limits. The site is supported by non-intrusive advertising.

Do I need to create an account or sign up?

No, UtiliTools requires no sign-up, no email, and no account. Just open any tool and start using it immediately.

Are my files safe? Do you upload them to a server?

Your files are 100% safe. Almost all UtiliTools process files directly in your browser using JavaScript and WebAssembly. Your files never leave your device and are never uploaded to any server.

What tools are available on UtiliTools?

UtiliTools offers 115+ tools across 6 categories: PDF tools (convert, compress), Image tools (convert, compress, resize), Video tools (convert, extract audio), Text tools (case converter, diff, markdown), Developer tools (JSON formatter, Base64, hash generator, regex tester, and more), and Utilities (QR codes, unit converter, password generator, timer).

Does UtiliTools work on mobile devices?

Yes, UtiliTools is fully responsive and works on smartphones, tablets, and desktops. All tools are optimized for touch interfaces and smaller screens.

How is UtiliTools different from other online tool websites?

Unlike most online tool websites, UtiliTools processes your files directly in your browser — no uploads, no server processing, no waiting. This means faster results and complete privacy. Plus, there are no file size limits or daily usage caps.

What is an SSL/TLS certificate?

An SSL/TLS certificate is a digital certificate that authenticates a website's identity and enables an encrypted connection between a web server and a browser. It ensures that data transferred between users and websites remains private and secure.

How do I know if an SSL certificate is valid?

A valid SSL certificate must be issued by a trusted Certificate Authority (CA), must not be expired, and the domain name must match the certificate's subject or Subject Alternative Names. This tool checks all of these conditions automatically.

What happens when an SSL certificate expires?

When an SSL certificate expires, browsers will display security warnings to visitors, potentially blocking access to the website. This can lead to lost traffic, reduced trust, and security vulnerabilities. It is recommended to renew certificates before they expire.

home/cybersecurity/ssl-checker

SSL/TLS Certificate Checker

Check the SSL/TLS certificate of any domain. View validity status, issuer details, expiration dates, cipher suite, protocol version, and more.

What is SSL/TLS?

SSL (Secure Sockets Layer) and TLS (Transport Layer Security) are cryptographic protocols that provide secure communication over the internet. TLS is the modern successor to SSL and is used by HTTPS websites.

Certificate Validity

SSL certificates have a limited validity period (typically 90 days to 1 year). An expired certificate will trigger browser warnings and can prevent users from accessing your website securely.

Cipher Suites

A cipher suite is a set of algorithms used to secure a TLS connection, including key exchange, bulk encryption, and message authentication. Modern suites use AES-256-GCM, ChaCha20, and ECDHE for forward secrecy.

How to Use SSL/TLS Certificate Checker

The SSL/TLS Certificate Checker inspects the security certificate of any HTTPS-enabled domain. It reveals the issuer, validity dates, certificate chain, protocol versions, and cipher suites. Use this tool to verify that certificates are properly installed, not expired, and configured according to security best practices.

Open the SSL Checker Tool

Navigate to the SSL/TLS Certificate Checker from the cybersecurity tools menu. The tool provides a domain input field for entering the hostname you want to inspect.

Enter the Domain Name

Type the domain name you want to check, such as example.com. You do not need to include https:// as the tool automatically connects on port 443.

Run the Certificate Check

Click the check button to establish a TLS connection to the domain and retrieve the complete certificate information and chain details.

Review Certificate Details

Examine the issuer, subject, validity period (not before/not after dates), serial number, and signature algorithm of the certificate.

Inspect the Certificate Chain

Verify that the complete chain of trust is properly configured, from the leaf certificate through any intermediates up to the trusted root certificate authority.

Common Use Cases

Certificate Expiration Monitoring

Regularly check certificates for domains you manage to ensure they are renewed before expiration and avoid service disruptions.

Post-Installation Verification

Confirm that a newly installed or renewed SSL certificate is correctly configured, properly chained, and trusted by clients.

Security Compliance Auditing

Verify that domains meet compliance requirements for TLS versions, cipher suite strength, and certificate authority trustworthiness.

Third-Party Vendor Assessment

Evaluate the SSL configuration of third-party services and vendors that handle sensitive data to ensure they maintain adequate encryption standards.

Pro Tips

-Set up regular checks for your domains to catch certificates that are approaching expiration before they cause browser security warnings.
-Verify that intermediate certificates are properly included in the chain; missing intermediates cause trust failures on some devices.
-Check that the certificate covers all required subdomains, especially if you use a wildcard certificate or Subject Alternative Names.
-Older TLS versions (1.0 and 1.1) are deprecated. Confirm your server supports only TLS 1.2 and 1.3 for modern security compliance.

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