Contact Us
We'd love to hear from you. Whether you found a bug, have a feature request, or want to discuss business — reach out through any channel below. We are a small team of smart card engineers building tools for the community, and we genuinely value your feedback. Every suggestion helps us improve the toolkit and prioritize new features. If you are unsure which channel to use, email is always the best choice for any type of inquiry.
Response time: We typically respond within 1-2 business days. For urgent security issues (e.g., vulnerability in our tool implementations), please use email with the subject line
[SECURITY].
For inquiries, please email us directly at [email protected]. We typically respond within 1-2 business days.
For bug reports and feature requests, you can also open an issue on GitHub.
Common Questions
- Can you add a specific tool? Absolutely — email us with subject "Tool Suggestion" or open a GitHub issue.
- I found a bug in a tool output. Please include the exact input, expected output, and actual output. Screenshots help.
- Do you offer API access? Not currently. All tools are browser-based. If you need programmatic access, you can embed our tool pages or use the underlying algorithms from our open-source JavaScript.
- Can I use your tools in my company? Yes — all tools are free to use. See our Terms of Service for details on usage disclaimers.
- Are the tools really client-side only? Yes. All cryptographic operations, encoding, parsing, and decoding happen entirely in your browser using JavaScript and Web Crypto API. No data is ever sent to our servers. You can verify this by opening your browser's developer tools and inspecting network requests while using any tool.
- Want to write for the knowledge base? We welcome guest contributions. If you have expertise in smart cards, cryptography, or related standards and want to share a tutorial or deep-dive article, send us an email with a brief outline.
See also: Privacy Policy | Terms of Service | About Us | Disclaimer