json.express — Online JSON Query & Explorer
json.express is a free, fast, zero-dependency online tool for querying and exploring JSON data directly in your browser. Your data never leaves your device.
Features
- Powerful JSON Queries — Use dot notation, array indexing, wildcards ([*]), array slicing ([0:3]), recursive descent (..key), and bracket notation (["key"]) to extract exactly the data you need.
- Multiple View Modes — View query results as syntax-highlighted JSON, an interactive collapsible tree, or auto-generated TypeScript interfaces.
- Lenient JSON Parser — Handles trailing commas, single-line and block comments while preserving string content.
- Shareable URLs — Compress your JSON input and query into a shareable URL using built-in deflate compression.
- QR Code Sharing — Generate QR codes for quick mobile sharing.
- TypeScript Type Generation — Automatically generate TypeScript interfaces from your JSON data.
- Theme Support — Switch between system, light, and dark themes.
- Privacy First — Everything runs locally in your browser. No server, no tracking, no data collection.
Query Syntax Examples
data.users[0].name — Access nested propertiesdata.users[*].email — Wildcard to get all emailsdata..id — Recursive descent to find all id fieldsdata.items[0:3] — Array slicingdata["special-key"] — Bracket notation for special characters
json.express is an alternative to tools like jq, JSONPath evaluators, JSON Crack, JSON Editor Online, and JSON formatters. It combines querying power with a clean, minimal interface — all in a single HTML file with zero dependencies.
Learn more about json.express