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Offline JSON validator, syntax checker, pretty-printer, and tree inspector.
JSON Validator is a fast, 100% offline, privacy-focused developer tool built for Android software engineers, web developers, and API integrators. Validate, format, minify, and inspect JSON data instantly on your device without sending any data to external servers. 🚀 Key Features: • Instant JSON Validation: Detect syntax errors with precise line number, column number, and detailed error explanations. • Code Editor with Line Numbers: Syntax highlighting for keys, string literals, numbers, booleans, nulls, and brackets with undo/redo support. • Format \& Pretty Print: Beautify messy JSON payloads with customizable indentation (2 spaces, 4 spaces, or Tab). • Minify JSON: Compress JSON by stripping unnecessary whitespaces and newlines. • Interactive Tree Viewer: Expand and collapse JSON objects and arrays in a structured hierarchical tree. • Search within JSON: Find text matches with next/previous navigation and match counting. • File Management (SAF): Open and save .json documents directly using Android Storage Access Framework. • Recent Validation History: Access and reload previous validation snippets and test results. • Sample JSONs: Built-in sample documents (User Profile, E-Commerce Catalog, GeoJSON, REST API response, and Invalid syntax example). • Dark \& Light Themes: Fully adaptable Material 3 Day/Night theme switcher with adjustable editor font sizes. • Syntax Reference: Built-in RFC 8259 cheat sheet and JSON formatting rules. 🔒 100% Privacy \& Offline JSON Validator works entirely offline. We do not collect, store, transmit, or analyze any JSON contents, text inputs, files, or personal information. No unnecessary permissions are requested. ⚠️ Disclaimer JSON Validator is provided as-is for development, debugging, and data inspection purposes. While every effort is made to adhere strictly to RFC 8259 specifications, the developers are not liable for any data loss, misinterpretation, or software integration issues arising from application usage.