About Us

A free, privacy-first online toolkit for developers

Who We Are

Ken Webmaster Tools is a free online toolkit built for developers and webmasters. We provide 12 browser-based tools covering development, operations, security, and everyday utility tasks.

All tools run entirely on the client side. Your data never leaves your device — no backend servers, no uploads, no accounts required. Every calculation happens in your browser.

What We Offer

Our toolkit currently includes 12 tools, each designed for a specific developer need:

•Development — JSON formatting & validation, regex testing, case conversion, URL/Unicode encoding
•Security — Hash calculation (MD5/SHA), AES/DES/RSA encryption, password generation
•Conversion — Timestamp & date conversion, Base64 & image conversion, config format (YAML/TOML/JSON) conversion
•Utilities — QR code generation, Cron expression parsing

Our Principles

Privacy First

All tools run in your browser. No data is sent to any server. You can inspect the network tab to verify — there are no API calls, no tracking beacons, no data collection.

Free & Open

Every tool is completely free to use with no limits, no paywalls, and no registration. We believe essential developer tools should be accessible to everyone.

Simple & Fast

No unnecessary UI clutter, no loading spinners, no sign-up forms. Open a tool, paste your input, and get results instantly. Keyboard-friendly with copy-on-double-click and real-time preview.