JSON Knife
30 free developer tools. No ads, no signup, no BS.
JSON Knife launched on February 23, 2026 with 4 votes, #2,349 of 16,627 launches that month and more than 75% of that year's launches.
What it does
A fast, clean toolkit for developers: JSON formatter, validator, diff, converters, regex tester, SQL formatter, JWT decoder, cron generator, Docker Compose builder, Mermaid editor, Tailwind v3→v4 migrator, and 18 more. Runs entirely in your browser — nothing leaves your machine.
50 free developer tools for JSON formatting, validation, conversion, encoding, regex, SQL, CSS, Markdown, DevOps, and more. No ads, no popups.
50 tools for JSON, YAML, encoding, regex, DevOps, and more. Fast. Clean. Free. 100% free. No accounts. No limits. Runs entirely in your browser. Explore JSON as a collapsible tree with color-coded values and path copying. Convert JSON arrays to CSV and back, flattening nested objects with dot keys. Validate YAML syntax and catch indentation errors before they break your pipeline. Test JSONPath expressions against JSON data with dot notation, wildcards, and recursive descent. Generate a JSON Schema from any JSON object with type inference and nested support. Validate JSON data against a JSON Schema. Supports draft-07 and 2020-12 with detailed error reporting. Generate TypeScript interfaces…from tools.shanecode.org
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