
IT Tools
DevToys
CyberChef
ToolZip.xyz
FreeToolkit
NanoUtil
BestToolsKit
DeveloperToolsKit offers 35+ free, browser-based developer tools to boost productivity—no registration, no data tracking. Format JSON, generate hashes, create color palettes, and more. Fast, intuitive, and always available.

Decode and verify SSL/TLS certificates online. Extract X.509 details including issuer, validity, SAN, and fingerprint. Fast, secure, and browser-based.

Which is more popular?
Based on our record, Cert Decoder seems to be more popular. It has been mentioned 1 time since March 2021.
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | developertoolskit.com | certdecoder.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from Turkey · 1 - 9 employees · 2025 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


DeveloperToolsKit is a powerful collection of 35+ essential online developer tools designed to simplify and accelerate your daily development workflow. Whether you’re formatting JSON, converting text cases, generating secure passwords, creating color palettes, or analyzing CSV files,...
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.
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing DeveloperToolsKit and Cert Decoder.
DeveloperToolsKit's answer
DeveloperToolsKit was created out of a developer's frustration with having to jump between dozens of different websites for simple, repetitive tasks. The goal was clear: bring the most essential tools together in one lightweight, private, and intuitive toolkit.
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.
DeveloperToolsKit's answer
Next.js (React) Node.js
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
DeveloperToolsKit's answer
Our primary audience includes frontend and backend developers, DevOps engineers, software testers, and coding students who need reliable tools for data formatting, encoding, hashing, and more—accessible anytime, from anywhere.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
DeveloperToolsKit's answer
Unlike many cluttered or ad-heavy alternatives, DeveloperToolsKit offers a seamless, ad-free experience with blazing fast performance. All tools are 100% free, mobile-friendly, and require no sign-up. It respects your privacy and saves you time.
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.
Cert Decoder's answer:
certdecoder.com is primarily built for developers, sysadmins, cybersecurity enthusiasts, and DevOps engineers.
DeveloperToolsKit's answer
DeveloperToolsKit combines 35+ frequently used developer tools into a clean, fast, and modern interface—entirely in your browser, with no tracking, no registration, and no fluff. It's built with a privacy-first mindset and designed for speed and simplicity.
Share your experience with using DeveloperToolsKit and Cert Decoder. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.


Tracking DeveloperToolsKit since Jun 2025.
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
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