Analyze your SSL certificate, its expiration date, security level, and compliance with encryption standards. Helps improve website security.
Determines if the certificate is installed correctly and if its validity period has not expired. This helps avoid HTTPS errors.
Checks the level of data encryption, which is important for protecting users' personal information. Helps minimize cyberattack threats.
Sites with valid SSL certificates are perceived as more reliable. Search engines prefer HTTPS resources.
The SSL Certificate Checker verifies a website’s SSL/TLS certificate, its validity period, and basic connection security parameters.
The tool helps you:
verify the presence of an SSL certificate
check the certificate expiration date
identify the certificate issuer
verify HTTPS support
detect potential SSL/TLS issues
Suitable for SEO, DevOps, system administration, web development, and website monitoring.
After a check is completed, the following certificate information is displayed:
Parameter | Description |
|---|---|
Domain | The website for which the certificate was issued |
Issuer | The organization that issued the certificate |
Validity Period | Start and expiration dates |
Time Remaining | Number of days until expiration |
Status | Whether the certificate is valid |
Protocol | The TLS version being used |
SAN (Subject Alternative Names) | Additional domains covered by the certificate |
The term “SSL” is still widely used, but modern websites use TLS.
Term | Status | Usage |
|---|---|---|
SSL | Deprecated | Rarely used today |
TLS | Current standard | Modern HTTPS connections |
HTTPS uses TLS for:
encrypting traffic
protecting user data
verifying website authenticity
SSL/TLS affects not only security but also overall website operation.
Area | Impact |
|---|---|
Security | Data encryption |
SEO | HTTPS is a ranking signal |
Browsers | Security warnings when HTTPS is missing |
User Trust | Protection of forms and authentication |
APIs and Integrations | Many services require HTTPS |
An expired or misconfigured certificate may cause browsers to block access to the website.
Use TLS 1.2 or TLS 1.3
Configure automatic certificate renewal
Verify SSL after migrations and CDN changes
Monitor mixed content issues
Use HTTPS across all website pages
Checking the SSL certificate helps ensure that the connection to the site is secure. SSL encryption protects user data and affects the site's ranking in search engines.
The tool analyzes the correctness of certificate installation, checks its validity period, and compliance with modern security standards.
Regular SSL checking is necessary for website owners to prevent errors in data transfer and ensure user privacy.
An SSL certificate encrypts data between your website and visitors' browsers, ensuring secure communication. It's essential for protecting sensitive information, increasing trust, and improving SEO rankings.
Our tool checks certificate validity, expiration date, issuer information, encryption strength, certificate chain, and identifies common SSL issues like mixed content or certificate mismatches.
Check your SSL certificate monthly and set up expiration alerts. Many certificates expire annually or biennially. Automatic renewal is recommended to prevent service disruption.
Immediately renew or replace the certificate. Contact your hosting provider or certificate authority. Until the issue is resolved, visitors will see security warnings, which can undermine trust and SEO rankings.
Yes, services like Let's Encrypt provide free SSL certificates. Many hosting providers offer automatic SSL installation and renewal. Free certificates provide the same encryption as paid ones for most use cases.
SSL (Secure Sockets Layer) is the predecessor to TLS (Transport Layer Security). While the term SSL is still widely used, TLS technology is actually in use today, offering improved security.
Mixed content occurs when an HTTPS page loads resources (images, scripts, stylesheets) over HTTP. This compromises the page's security, as unencrypted resources can be intercepted or tampered with, and browsers will display security warnings.
A Wildcard SSL certificate secures the main domain and all its unlimited subdomains (e.g., *.example.com). This is a cost-effective and convenient solution for websites with many subdomains.
