Beautify, validate, minify, diff, and turn JSON into typed code — without leaving the page.
JSON is everywhere — APIs, configs, webhooks, logs — and reading raw, minified payloads slows you down. The JSON Toolkit gives you every common JSON operation in one workspace: pretty-print indentation, syntax validation with line-accurate errors, minification for transport, recursive key sorting for stable diffs, an expandable tree explorer for nested payloads, semantic two-pane diff that ignores key order, and a code generator that produces TypeScript interfaces, Go structs, or Python TypedDicts straight from a sample document. Everything runs locally in your browser — your JSON never leaves your machine — and the tool is keyboard-friendly with smart paste so you can drop messy clipboard contents and have them auto-formatted. Sign in to keep frequently-used payloads as snippets and pin the toolkit to your sidebar for one-click access.