JSON Formatter & Viewer - Editor, Query & Diff EN

The ultimate all-in-one JSON developer workbench for Edge.

Stop juggling multiple websites and extensions for formatting, validating, diffing, querying, and converting JSON. This all-in-one tool gives you a lightning-fast, privacy-first, zero-lag developer workbench right in your browser.

Whether you are debugging REST or GraphQL APIs, analyzing large payloads, or generating production code, this is engineered to be the only JSON extension you need.

CORE CAPABILITIES & TOOLS

1. SMART REPAIR & AUTO-FORMATTER
• Fix broken or malformed JSON with 1 click (handles trailing commas, single quotes, unquoted keys, Python dict literals, and JS comments).
• Beautify and format with 2-space, 4-space, or compact minified indents.
• Real-time syntax diagnostics with exact line and column error indicators.
• 1-click reversible escape / unescape for JSON string literals.
• Full Undo/Redo history (Ctrl+Z / Cmd+Z) so you never lose your edits.

2. DUAL QUERY ENGINES: JMESPath & JSONPath
• Query and slice complex JSON trees using industry-standard JMESPath or JSONPath expressions.
• Real-time Intellisense autocomplete suggestions for properties and functions.
• Built-in Cheat Sheet with 25+ real-world query examples (Filters, Projections, Deep Scans, Array Slices).
• Save your favorite queries and access full execution history.

3. HIERARCHICAL TREE & SPREADSHEET TABLE VIEWS
• Interactive collapsible tree view with depth level shortcuts (L1, L2, L3).
• Live search across keys and values with match count navigation.
• Tabular spreadsheet view: transform arrays of objects into structured, sortable data tables.
• Context menu: 1-click copy for Object Paths (e.g. $.users[0].name), Outer JSON, and Inner values.

4. VISUAL JSON COMPARE & DIFF ENGINE
• Side-by-side and tree diff comparison between JSON A (original) and JSON B (modified).
• Color-coded additions, deletions, and modifications.
• Instant swap, auto-format, and diff clipboard export.

5. INSTANT CODE & DATA CONVERTER (12+ LANGUAGES)
Convert JSON structures into strongly-typed code in seconds:
• TypeScript interfaces & type definitions
• Python Dataclasses / Pydantic models
• Go structs with json tags
• Rust structs with Serde derives
• Swift Codable models
• Dart / Flutter models with fromJson/toJson
• C# classes with System.Text.Json attributes
• C++ structs (nlohmann/json)
• PHP classes & SQL Table CREATE statements
• JSON Schema (Draft-07 validator & generator)
• Bi-directional CSV & YAML converters

6. OFFLINE DEVELOPER UTILITIES
• JWT Token Decoder: Inspect header, payload, expiration timestamps, and issuer claims.
• Base64 JSON Encoder & Decoder.
• JSON Schema Validator: Test data compliance instantly.
• Payload Inspector: File size, max depth, node counts, and key metrics.

100% PRIVATE & OFFLINE
• Your data NEVER leaves your computer.
• Zero telemetry, zero external API tracking, zero cloud dependencies.
• Runs 100% locally in your browser.

KEYBOARD SHORTCUTS

• Format JSON: Ctrl + Shift + F (Cmd + Shift + F)
• Run Query: Ctrl + Enter (Cmd + Enter)
• Undo Changes: Ctrl + Z (Cmd + Z)