Contact Us
We are a small independent team building free, privacy-respecting developer tools. We read every message we receive — developer feedback has directly shaped the tools we prioritize and the bugs we fix first.
The best way to reach us is by email: [email protected]
We aim to respond to all messages within 2 business days. For urgent issues (a security concern, a completely broken tool, or a DMCA notice), please write "Urgent" in the subject line.
Bug Reports
If a tool is not behaving correctly, please include:
- Tool name — e.g., "Regex Tester" or "Base64 Encoder"
- Browser and version — e.g., "Chrome 124 on Ubuntu 22.04" or "Firefox 126 on macOS 14"
- Input that caused the issue — please sanitize any sensitive data (API keys, tokens) before sharing
- Expected output vs. actual output — what you expected the tool to produce and what it produced instead
- Steps to reproduce — a brief description of what you did before the issue occurred
Feature Requests
Is there a developer tool or utility you use regularly that we do not yet cover? We welcome requests, especially for tools that can be implemented client-side without server dependencies. Common requests we receive include additional formatters, encoders, hash algorithms, and network utilities. A brief description of your use case helps us understand and prioritize.
Security Disclosures
If you discover a security issue with our site or tools, please email [email protected] with "Security" in the subject line. We take security reports seriously and will respond promptly.
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
Dev Tools Online is an independent project. We are not affiliated with any IDE vendor, cloud platform, or software company. Our goal is to provide reliable, private, free utilities for developers — tools that respect your data by keeping all processing local to your browser.