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ViewDNS.info VS Cert Decoder

Compare ViewDNS.info VS Cert Decoder and see what are their differences

Netumo
Ensure healthy website performance, uptime, and free from vulnerabilities. Automatic checks for SSL Certificates, domains and monitor issues with your websites all from one console and get instant notifications on any issues. sponsored
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ViewDNS.info logo ViewDNS.info

Free DNS related tools including Reverse IP Lookup, DNS Propagation Checker, Chinese Firewall Test...

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.
  • ViewDNS.info Landing page
    Landing page //
    2023-01-28
  • 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.

ViewDNS.info features and specs

  • Comprehensive Tools
    ViewDNS.info offers a wide range of DNS and domain-related tools that allow users to perform various types of lookups and analyses, including WHOIS lookups, DNS propagation checks, and reverse IP lookups.
  • User-Friendly Interface
    The website has an intuitive and straightforward interface, which makes it accessible for both technical and non-technical users to navigate and utilize the tools effectively.
  • Free Access
    ViewDNS.info offers many of its features for free, providing users with access to valuable DNS and domain information without requiring a paid subscription.
  • Useful for Troubleshooting
    The platform is particularly beneficial for network administrators and IT professionals in troubleshooting DNS issues, monitoring domain changes, and verifying propagation across different DNS servers.

Possible disadvantages of ViewDNS.info

  • Limited Advanced Features
    While ViewDNS.info offers numerous tools for free, it may not provide some of the advanced features and in-depth analysis available in premium DNS service providers.
  • Reliability Constraints
    As a free service, the platform may experience reliability issues or slower performance during high traffic periods, potentially leading to delays or incomplete data retrieval.
  • Ads and Sponsored Content
    The website hosts advertisements and sponsored content, which can be distracting for users and may affect the overall user experience.
  • No Dedicated Support
    Free services generally lack dedicated customer support, and users might have limited access to immediate assistance or troubleshooting help if issues arise.

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 ViewDNS.info and Cert Decoder)

ViewDNS.info

Cert Decoder

DNS Tools
100 100%
DNS Tools
0% 0
Decoding
0 0%
Decoding
100% 100
Network & Admin
100 100%
Network & Admin
0% 0
Monitoring Tools
0 0%
Monitoring Tools
100% 100

Questions & Answers

As answered by people managing ViewDNS.info 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

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Social recommendations and mentions

Based on our record, ViewDNS.info seems to be a lot more popular than Cert Decoder. While we know about 12 links to ViewDNS.info, 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.

ViewDNS.info mentions (12)

  • Show HN: DNS Benchmark Tool – Compare and monitor resolvers
    Is this benchmarking various recursive DNS servers like CloudFlare (heh), Google DNS, Quad9, but from the vantage point if the installed machine? For the other way around, to query the same DNS query from different vantage points across the globe, I recommend https://viewdns.info/. It has quite a few vantage points, and shows the results. It doesn't benchmark recursive servers separately, so it some results can be... - Source: Hacker News / 10 months ago
  • Sunsetting Whois
    This was announced originally early last year. It removes the requirement for TLD and nTLD (not ccTLD) operators to have a WHOIS service available, but doesn't mandate they must shut them down. So far the sunsetting has had little effect with most TLDs still having their WHOIS services online. In reality, I think we'll see a period of time where many TLDs and nTLDs have both WHOIS and RDAP available.... - Source: Hacker News / over 1 year ago
  • CIA 2010 covert communication websites
    Heya, Founder of https://viewdns.info/ here (used by any mentioned in the article a bit). If anyone is doing this kind of research, feel free to reach out at feedback@viewdns.info as I'm more than happy to extend some free API credits etc! -Hughesey. - Source: Hacker News / almost 3 years ago
  • IP Tools - a Network Managing App
    This might help you get a start: There are lots of common tools. https://viewdns.info/. Source: over 3 years ago
  • Subsidiary & Brand Domain Activity
    I used viewdns.info - allowed me to search by registrant name. I looked for Bed Bath Procurement and Liberty Procurement for the list I grabbed (~600 results). Spotted the .sex TLD and filtered down to that and hand-verified whether each result was truly owned by BBBY. I work in IT Audit and InfoSec, so was a piece of cake to find and filter the data. :D. Source: over 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 ViewDNS.info and Cert Decoder, you can also consider the following products

Whats My DNS - Instantly check your domain names current IP address and DNS record information against multiple name servers located in different parts of the world.

DNSChecker.org - Check DNS Propagation worldwide. DNS Checker provides name server propagation check instantly. Changed nameservers so do a DNS lookup and check if DNS and nameservers have propagated.

DNS Checker Tool - Check Domain Name System (DNS) records for any website.

NsLookup.io - A simple and powerful tool for querying DNS records

MxToolBox - All of your MX record, DNS, blacklist and SMTP diagnostics in one integrated tool.

DNSdumpster.com - Open source domain intelligence lookups for security recon

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