JSON Knife – Browser-based toolkit with 30 developer tools

Summary: JSON Knife is a client-side toolkit offering 30 developer tools including JSON formatter, validator, diff, converters, regex tester, SQL formatter, JWT decoder, cron generator, Docker Compose builder, Mermaid editor, and Tailwind v3 to v4 migrator. It runs entirely in the browser without data leaving the machine, requiring no signup or tracking.

What it does

It provides multiple developer utilities that operate fully client-side, ensuring data privacy and fast performance. Tools cover JSON formatting, code conversion, syntax testing, and configuration generation.

Who it's for

Developers needing a variety of code and configuration tools accessible instantly without server interaction or account creation.

Why it matters

It eliminates reliance on ad-heavy, outdated online tools by delivering a fast, private, and comprehensive set of utilities directly in the browser.