FreeToolkit is a collection of simple, useful online tools designed to solve everyday problems quickly—without logins, clutter, or paywalls. It started as a personal side project to avoid constantly searching for reliable tools online, and slowly grew into a curated toolkit covering things like text utilities, developer helpers, SEO tools, and small productivity boosters. The focus is on speed and simplicity—open the site, use the tool, and get out. No distractions, no unnecessary features. Just tools that work.

WhiteKit brings together 55 developer tools in one place: formatters (JSON, XML, SQL, YAML), converters, security utilities (JWT, hashing, encoding), network calculators, and text tools.

Everything runs 100% client-side. Your data never leaves your device, so you can safely paste API keys, tokens, and production payloads. No sign-up, no upload step, and it keeps working offline once loaded.

Each tool is built to handle real edge cases rather than just the happy path — the cron parser implements Quartz 6-field semantics correctly, the IPv6 ULA generator follows RFC 4193 Appendix A, and the subnet calculator handles /31 and /32 edge cases.