Software Alternatives & Startups

URLscan.io VS Cert Decoder

Compare URLscan.io VS Cert Decoder and see what are their differences

URLscan.io logo URLscan.io

urlscan.io is a free service to scan and analyse websites. When a URL is submitted to urlscan.io, an automated process will browse to the URL like a regular user and record the activity that this page navigation creates.

Cert Decoder logo Cert Decoder

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.
  • URLscan.io Landing page
    Landing page //
    2023-05-12
  • Cert Decoder
    Image date //
    2025-03-22

Cert Decoder is a free online tool that helps you decode X.509 SSL/TLS certificates in PEM format. It instantly shows important information like the issuer, expiry date, SAN entries, and fingerprint. All data is processed locally in your browser, so nothing is ever sent or stored elsewhere.

URLscan.io features and specs

  • Comprehensive Analysis
    URLscan.io provides a detailed analysis of URLs, including screenshots, domain information, and HTTP transactions, helping users gain deep insights into the content and behavior of a website.
  • Threat Detection
    It helps identify malicious URLs by checking for phishing threats, malware, and other harmful activities. This is valuable for security researchers and IT professionals.
  • Public and Private Scans
    Users can perform both public scans, which are visible to everyone, and private scans that are only accessible by the user, offering flexibility depending on privacy needs.
  • API Access
    URLscan.io provides API access, enabling automated and programmatic interaction with its service, which is beneficial for integrating into other security tools and workflows.
  • Historical Data
    It maintains a historical archive of scanned URLs, allowing users to access past scan results and observe changes in the URL's content and behavior over time.

Possible disadvantages of URLscan.io

  • Limited Free Scans
    The free version of URLscan.io has a limit on the number of scans that can be performed, which might be restrictive for users who require extensive scanning capabilities.
  • Privacy Concerns
    Public scans are accessible by anyone, which might lead to privacy issues if sensitive URLs are mistakenly scanned publicly.
  • API Rate Limits
    API usage has rate limits which could affect users who need to perform a large number of scans or need consistent high-volume access.
  • Data Retention
    Historical scan data is retained for public scans, which could be a concern for users who prefer not to have their scan data stored long-term or made publicly available.
  • Dependency on Service Availability
    As a third-party service, users are dependent on URLscan.io's availability and performance. Any downtime or issues with the service can disrupt users’ workflow.

Cert Decoder features and specs

  • User-Friendly Interface
    Cert Decoder is designed with a simple and intuitive interface that makes it easy for users to navigate and use the tool without requiring extensive technical knowledge.
  • Comprehensive Analysis
    The tool provides detailed analyses of certificates, including information about validity, issuer, encryption algorithms, and more, helping users understand their security certificates thoroughly.
  • Free to Use
    Cert Decoder offers its services free of charge, making it accessible for individuals and organizations without budget constraints.
  • Quick Processing
    The tool processes certificate information rapidly, providing almost instant results for users, which is crucial for time-sensitive tasks.

Possible disadvantages of Cert Decoder

  • Limited Advanced Features
    Compared to some paid alternatives, Cert Decoder might lack advanced features that are necessary for more complex certificate management and diagnostics.
  • Reliance on Internet Access
    Users need an active internet connection to utilize the tool, which can be a limitation in areas with unreliable internet service.
  • Privacy Concerns
    While using an online service to decode certificates, there can always be privacy concerns regarding sensitive data being uploaded to a third-party server.
  • No Offline Mode
    Cert Decoder does not offer an offline mode, which could be a drawback for users who require functionality without constant internet availability.

Analysis of Cert Decoder

Overall verdict

  • Cert Decoder appears to be a free online tool for decoding and inspecting SSL/TLS certificates, CSRs, and related cryptographic data, making it useful for quick, no-install certificate analysis, though it should be used with awareness of general web tool privacy considerations when handling sensitive certificate data.

Why this product is good

  • Provides quick, browser-based decoding of certificates without needing to install software
  • Useful for troubleshooting SSL/TLS certificate issues on the fly
  • Simple interface aimed at both technical and semi-technical users
  • No cost to use for basic certificate decoding tasks

Recommended for

  • System administrators needing to quickly verify certificate details
  • Developers debugging SSL/TLS configuration issues
  • IT support staff troubleshooting website certificate errors
  • Students or professionals learning about certificate structure and encoding

Category Popularity

0-100% (relative to URLscan.io and Cert Decoder)
Monitoring Tools
97 97%
3% 3
Decoding
0 0%
100% 100
Security & Privacy
100 100%
0% 0
Email Marketing
100 100%
0% 0

Questions & Answers

As answered by people managing URLscan.io and Cert Decoder.

What's the story behind your product?

Cert Decoder's answer:

I built certdecoder.com over the weekend for my own needs. Sometimes in my work, I need to verify and check certificate details.

Which are the primary technologies used for building your product?

Cert Decoder's answer:

certdecoder.com was built using just JavaScript and HTML—simple, fast, and with all processing happening locally in your browser, so no certificate data is sent to any server

How would you describe the primary audience of your product?

Cert Decoder's answer:

certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.

Why should a person choose your product over its competitors?

Cert Decoder's answer:

Simple, fast, and reliable. Some similar tools can’t even decode basic certificates. I rigorously tested my tool with many real-world certificates and covered several edge cases where competitors fall short.

Who are some of the biggest customers of your product?

Cert Decoder's answer:

certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.

User comments

Share your experience with using URLscan.io and Cert Decoder. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, URLscan.io seems to be a lot more popular than Cert Decoder. While we know about 87 links to URLscan.io, we've tracked only 1 mention of Cert Decoder. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

URLscan.io mentions (87)

  • Fake costumer support
    The final missing piece is the link, throw that in https://urlscan.io and it will show you if it resolves to a legitimate blizzard domain, which if it does. Pretty safe to say it will be legitimate email and the error is possibly on their part regards to the mailshot/merge or its on your part and its an old blizzard name/account you've long since forgotton about. Source: almost 3 years ago
  • legit check please
    Use a site like https://urlscan.io/ to check a url. Source: almost 3 years ago
  • Introducing OSINT Template Engine: An open source OSINT Tool.
    Transform OSINT sources such as shodan, bgpview & urlscan into templates which you can use to query & store any and each of the API endpoints they provide. Source: about 3 years ago
  • cbsecure.online
    Coinbase's social media presence How to report a phishing scam Coinbase.com - our homepage Urlscan - a free service to scan and analyze websites. Source: about 3 years ago
  • Administration with inbibriation
    LMAO! Who else used urlscan.io to preview what this mad man was sending over?! Source: about 3 years ago
View more

Cert Decoder mentions (1)

  • Banana.dog back from the dead
    Why? Because I built certdecoder.com and couldn’t find a decent place to submit it. So I said screw it — I’ll build my own. With blackjack and hookers. - Source: dev.to / over 1 year ago

What are some alternatives?

When comparing URLscan.io and Cert Decoder, you can also consider the following products

VirusTotal - VirusTotal is a free service that analyzes suspicious files and URLs and facilitates the quick...

Metadefender - Metadefender, by OPSWAT, allows you to quickly multi-scan your files for malware using 43 antivirus...

Any.Run - ANY.RUN is an online interactive sandbox for DFIR/SOC investigations. The service gives access to fast malware analysis and detection of cybersecurity threats.

AbuseIPDB - AbuseIPDB is an IP address blacklist for webmasters and sysadmins to report IP addresses engaging in abusive behavior on their networks, or check the report history of any IP.

Joe Sandbox - Automated Malware Analysis - Development and Licensing of Automated Malware Analysis Tools to Fight Malware

Cuckoo Sandbox - Cuckoo Sandbox provides detailed analysis of any suspected malware to help protect you from online threats.