This content originally appeared on DEV Community and was authored by Jurijs Ivolga
Sometimes in my daily work, I need to handle certificates and double-check their details. Questions like, "Is this a new or old certificate? Does it have the SAN I need?" often come up.
Recently, I decided to build my own online certificate decoder – CertDecoder.com. I know there are dozens, if not hundreds, of certificate decoders available online, but I wanted something simple, fast, and reliable for my own use.
Why try Cert Decoder?
If you're juggling certificates at midnight and struggling to keep your eyes open, you need a straightforward tool to quickly verify your certificate details without extra hassle.
Just open CertDecoder.com, paste your PEM-formatted X.509 certificate, and instantly view its details.
- Privacy-first: All processing happens entirely in your browser, ensuring no certificate data is ever leaked.
- Retro and minimalist: It's pure HTML—something you rarely see these days, offering a nostalgic, minimalist look.
If you're a web developer, sysadmin, cybersecurity enthusiast, or DevOps junkie, check it out here 👉 CertDecoder.com
I'd greatly appreciate your feedback! 🙏
Feel free to share your suggestions or feature ideas to make it even better.
This content originally appeared on DEV Community and was authored by Jurijs Ivolga
Jurijs Ivolga | Sciencx (2025-03-10T16:32:01+00:00) CertDecoder.com – A Free and Simple Online Certificate Decoder”. Retrieved from https://www.scien.cx/2025/03/10/certdecoder-com-a-free-and-simple-online-certificate-decoder/
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