All Tools
JSON Mock Data Generator from Schema
Generate mock JSON from schema instantly. Supports constraints, enums, arrays, and nested objects. Create realistic test data for APIs, UIs.
JSON i18n - Compare and Merge Translations
Compare and merge JSON translation files online. Find missing keys, validate ICU placeholders, and export clean locale files. Fast, private.
JSON Patch Generator
Generate JSON Patch (RFC 6902) online. Diff two JSON docs or build operations manually, preview results, and export. Supports add, remove, replace, move, copy.
JSON Merge Patch Builder
Build RFC 7396 JSON Merge Patches, preview results, and export. Diff two JSONs, apply patch, and validate deletes via null. Fast, private, and free in-browser.
INI to JSON Converter
Convert INI to JSON in your browser. Supports sections, type inference, repeated keys, lists, and dotted keys. Beautify or minify and export fast and free.
TOML to JSON Converter
Convert TOML to JSON online. Validate TOML, preserve data types, and export clean JSON. Fast, private, and browser-based.
JSON Date-Time Normalizer
Normalize dates and times in JSON. Convert Unix timestamps, ISO strings, and custom formats into a consistent standard. Free, fast, and browser-based.
GeoJSON Viewer and Validator
View and validate GeoJSON online. Interactive map rendering with error checks for points, lines, and polygons. Free, fast, and browser-based.
URL Encode - Decode JSON
Encode or decode JSON for URLs and APIs. Free online JSON URL encoder and decoder with validation, beautify, and export options.
JWT Decoder and Inspector
Decode and inspect JWT tokens online. View header, payload, and signature, validate claims, and check expiry or algorithms. Free and private.
Large JSON Splitter and Merger
Split big JSON files into smaller parts or merge multiple JSON into one. Supports chunking, NDJSON, deduplication, and sorting. Free and browser-based.
JSON Filter and Map Playground
Filter, map, and transform JSON arrays online. Free JSON filter and map playground with custom expressions, sample data, and export options.