Contact Us
We are a small independent team building free, browser-based security and cryptography utilities. We read every message we receive and take security feedback especially seriously.
The best way to reach us is by email: [email protected]
We aim to respond to all messages within 2 business days. For security disclosures or urgent issues, please write "Security" or "Urgent" in the subject line.
Bug Reports
If a tool is producing incorrect results or behaving unexpectedly, please include:
- Tool name — e.g., "Password Generator" or "JWT Decoder"
- Browser and version — e.g., "Chrome 124 on Windows 11" or "Firefox 126 on macOS 14"
- Description of the issue — what you expected and what happened instead
- Steps to reproduce — a brief description of what you did before the issue occurred
Please do not share real passwords, tokens, or cryptographic keys when reporting bugs. A synthetic example that reproduces the issue is sufficient.
Security Disclosures
If you discover a security vulnerability in our site or tools — including issues with our cryptographic implementations, content security policy, or any behavior that could compromise user data — please email [email protected] with "Security Disclosure" in the subject line. We will acknowledge your report promptly and work to address verified issues quickly.
Feature Requests
Is there a security utility or cryptographic tool you need that we do not yet cover? We welcome requests for new client-side security tools. Please describe the use case — what you are trying to accomplish — and we will consider it for a future release.
Business Inquiries
For advertising partnerships, content collaborations, or other business inquiries, please email [email protected] with "Business Inquiry" in the subject line.
About This Site
Crypto Tools Online is an independent project. We are not affiliated with any security company, certificate authority, or cryptographic standards body. Our goal is to provide accurate, reliable security utilities that keep your sensitive data local to your browser.