Ssl Tls Scanner
Fast, accurate and free online ssl tls scanner tool running directly in your browser.
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Skaner SSL/TLS
Perform a quick, non-invasive SSL/TLS configuration test for a specified host. The tool checks basic information about the protocol, ciphers, certificate (CN, SAN, validity, key length) and gives approximate tips on known problems (e.g. SSLv3/POODLE). This is not a substitute for a full TLS audit.
No significant problems were detected based on the tests performed. This is a quick, indicative scan and does not replace a full SSL/TLS audit.
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Other tools you may find usefulSSL TLS Scanner online - check the certificate, protocols and HTTPS security with one click
SSL TLS Scanner is a convenient browser tool that, after entering the address of your website, connects to the server via HTTPS, analyzes the TLS protocol, SSL certificate and the response to selected known attacks, and then presents a clear report, thanks to which you can see in a few minutes whether the configuration is modern and compliant with good practices and ready for browser requirements and security standards.
Instead of manually running commands from the console, remembering openssl parameters, searching for commands on the Internet and rewriting the results, you can use SSL TLS Scanner, enter the domain of your website in one field, optionally adjust the port and response timeout, choose whether you want to check the protocols, certificate and status of known attacks, and then run the scan, after which you will receive a summary in the form of simple sections and tables, understandable both to the administrator and to a person who simply wants to be sure that his HTTPS works correctly.
What exactly does SSL TLS Scanner check on your HTTPS server
SSL TLS Scanner makes a real encrypted connection to the specified host and port, using SNI to properly recognize the certificate for a specific domain, and then analyzes the obtained information about the protocol, cipher and certificate, so you can quickly assess whether your HTTPS is based on modern standards or still uses outdated, weak versions of TLS keys, unrecommended signature algorithms or too short certificate validity period.
TLS Protocol and Cipher Analysis
- Check what protocol was actually negotiated during the connection, for example TLS 1.0, TLS 1.1, TLS 1.2 or TLS 1.3, along with a simple assessment of whether it is a version considered current or rather obsolete.
- Detection of obviously insecure or historical protocols, such as SSLv3 or earlier implementations, which may suggest vulnerability to old classes of attacks and should be disabled in the server configuration.
- Collecting information about the cipher used and the key length, which allows you to determine whether the configuration prefers modern cipher suites or still allows too weak algorithms or short keys.
Verification of the SSL certificate and its parameters
- Read SSL certificate data, including principal host name (CN), alternate name (SAN) list, issuer, and signing algorithm, to ensure the certificate matches your domain and is issued by a trusted certificate authority.
- Check the certificate validity period, start and end date, along with the calculation of the number of days until expiration, so you can plan the renewal well in advance and avoid unpleasant messages in the browser.
- Analysis of the key type and its length, for example RSA 2048 bit or more, EC with the recommended length, with an additional warning when a too short key or an outdated signature algorithm based on MD5 or SHA1 is detected.
SSL and TLS Known Attacks Module
If you check the option to check for known attacks, SSL TLS Scanner will use the collected information about protocols and ciphers to prepare a concise module in which you will find a simple answer whether the server looks potentially susceptible to classic problems such as POODLE, BEAST or other historical weaknesses, making it easier to draw conclusions about which versions of TLS and which cipher suites should be disabled in the configuration.
Quick summary of connection parameters
In the summary section, SSL TLS Scanner shows the detected host, port, IP address, protocol used, cipher name, key length and information about whether the certificate has been read correctly, which allows you to see the most important data in one place and immediately paste it into documentation, a team report or a client report.
How to use SSL TLS Scanner step by step
The tool's interface is simple and based on a few fields and switches, so the first SSL test can be done almost immediately, even if you are not professionally involved in server administration, but just want to check whether your website works with the correct certificate and a modern encryption protocol.
- In the target field, enter the address of the server or website you want to test, for example
https://yourdomain.plor in the formatyourdomena.pl:443if you want to immediately indicate a specific port of the HTTPS service. - Set a response timeout in seconds so that SSL TLS Scanner knows how long to wait for a response, which is especially useful for slower servers or environments with more extensive network security.
- Check the TLS protocol checking switch if you want to see which TLS version was actually negotiated and whether the server accidentally allows old, no longer recommended versions such as TLS 1.0 or TLS 1.1.
- Enable certificate checking so that the tool retrieves data about domain name, issuer, validity period, and public key parameters and compares them with basic good security practices.
- If you are also interested in a simplified assessment of vulnerability to known classic attacks, turn on the attack module switch, which will use the collected information about protocols and ciphers to prepare short descriptions and recommendations.
- Click the start button, wait for the progress bar to complete, and then view a detailed report that includes a summary, a list of potential issues detected, and separate modules for protocols, certificate, and known attack status.
How to read the SSL TLS Scanner report and what each section means
The SSL test report is divided into several separate parts, so you can start with a quick summary and only then go into details of individual modules, for example protocols, certificate or known attacks, which makes the work much easier for both the administrator and the person who just wants to check whether everything is normal.
| SSL report section | What data does | contain? |
|---|---|---|
| Connection summary | Host, port, IP address, TLS protocol, cipher name, key length, information whether a certificate was detected. | Check that the host and port match what you actually want to test, make sure that the TLS protocol is up to date and that the key length looks secure. |
| List of potential problems | A summary list of warnings and notes from various modules, sorted by category, severity and simple description in a language understandable without knowledge of cryptography. | Start with items marked as high severity, especially if they involve outdated TLS protocols, very short keys, or signature algorithms that browsers may treat as insecure. |
| TLS Protocol Module | A detailed description of what protocol has been agreed upon, what versions have been detected, and what their overall assessment is in terms of currency and security. | If SSLv3, TLS 1.0 or TLS 1.1 appears in the report, it is worth considering disabling them in the server configuration, especially if the application serves users through modern browsers. |
| SSL certificate module | Data about the domain name, alternative names, validity period, publisher, signature algorithm and public key type and length. | Make sure the certificate matches the domain being served, contains appropriate SAN entries for all subdomains, and expires promptly to avoid unexpected expiration. |
| Known attacks module | Concise statuses informing whether, based on the detected protocol and cipher, the server may be particularly vulnerable to classic SSL or TLS attacks known from the security literature. | The module does not run exploits, it only interprets the configuration, so consider this information as a guide to what options in the configuration are worth reviewing and possibly tightening. |
Who is SSL TLS Scanner for and when is it worth running it?
SSL TLS Scanner has been designed to be useful both for server administrators and DevOps engineers, as well as for marketers, online store owners and freelancers who want to be sure that their SSL-certified website is perceived by browsers as secure and that the TLS protocol configuration does not differ from today's standards.
Typical SSL scanner usage scenarios
- Checking a newly implemented website or application after activating the SSL certificate in the hosting or cloud panel to see if everything works as expected.
- Periodically review HTTPS configuration on existing servers, especially after server software updates or security-related changes.
- A quick verification before sharing the address with the client, where you check the TLS version, the signing algorithm and the time until the certificate expires.
- Prepare a simple report for your managers or team that shows that the site uses up-to-date protocols and has a valid SSL certificate.
Best Practices for Using SSL TLS Scanner
- Only test your own hosts or environments to which you have explicit permissions, and use the results to plan configuration changes, not to scan random servers on your network.
- Record the results of more important scans, such as before and after configuration changes, to have a simple history of the security evolution of your service.
- Combine findings from SSL TLS Scanner with other monitoring tools and vulnerability scanners to create a more complete picture of the security of your infrastructure.
Frequently asked questions about the SSL TLS scanner
Can SSL TLS Scanner damage my server or online store
The tool is based on standard encrypted connections, such as those made by the user's browser, and on passive reading of information from the certificate and protocol, so it does not perform destructive operations on the server or modify any data, and the only load is a few additional HTTPS connections, which under normal conditions they should not be noticeable for a properly configured infrastructure.
Is the SSL test result from this tool sufficient as the only source of truth about security
SSL TLS Scanner works great as a quick online SSL test that detects outdated protocols, weak keys and disturbing certificate parameters, but it definitely does not replace a full security audit, application analysis, server configuration review or professional penetration tests, so it is worth treating it as a first step and a complement to other tools, and not the only measure of the security level.
Why does the tool warn about TLS 1.0 and TLS 1.1 when some old systems still support them
Older versions of TLS are being phased out by browsers and service providers, and many organizations require at least TLS 1.2 in their security policies, so SSL TLS Scanner pays close attention to the fact that your setup still offers TLS 1.0 or TLS 1.1 so you can make an informed decision whether your priority is compatibility with very old software or meeting modern security requirements.
What to do when the report shows a small number of days until the expiration of the SSL certificate
If in the certificate module you see that the time until expiration is counted in days, not in months, it is worth planning the certificate renewal with your provider right away, so as to avoid a situation in which browsers will start displaying warnings about an invalid or expired certificate, which may reduce user confidence and directly translate into a drop in conversions or sales in store.
Can I test several ports or hosts with the same SSL scanner
Yes, there is nothing stopping you from running an SSL test on multiple hosts or ports by simply entering subsequent addresses or host:port combinations and starting the scan again, which is especially useful when you use several HTTP server instances or separate services listening on different HTTPS ports in one infrastructure.
Run SSL TLS Scanner and see if your HTTPS configuration is really secure
If you want to do an SSL test in a few moments, check the TLS version, encryption parameters, certificate validity and quick statuses on known attacks, use SSL TLS Scanner, run a scan for your domain and use the report as a practical checklist of changes that are worth making before browsers or users start reporting security problems with your website.
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