JSON Editor Online 100% Client-Side & Private
Edit, format, beautify, compare, transform, and convert JSON documents seamlessly with dual-pane workspaces, tree navigation, and instant tabular views.
⚡ Query & Transform JSON Data
📊 JSON & CSV Bidirectional Converter
Convert between JSON arrays of objects and CSV spreadsheet files instantly with zero latency.
Export Active JSON as CSV
Exports the array in Document 1 as a downloadable .csv file formatted for Microsoft Excel & Google Sheets.
Import CSV to JSON
Open any .csv file to automatically parse and transform rows into a clean JSON array of structured objects.
📘 Everything You Need in a Modern Online JSON Editor
Designed to replicate and exceed the feature set of jsoneditoronline.org, this client-side suite gives software engineers, API architects, and data analysts complete control over complex JSON documents without third-party tracking or server exposure.
◫ Dual-Pane Workspace & Diff Comparison
Open two independent documents side-by-side to compare staging payloads against production responses. The built-in visual diff engine flags added keys in green, deleted properties in red, and mutated values in yellow.
🌳 Interactive Tree & Table View Modes
Switch seamlessly between raw code mode with line gutters, an expandable tree view with type tags, and a flat spreadsheet table mode with sortable columns and inline double-click cell editing.
🔍 Instant Syntax Validation & Type Inspection
Real-time client-side linting marks exact error lines and columns with descriptive messages. Inspect key counts, byte size, and data types on the fly.
⚡ Query & Transform with JavaScript
Transform large payloads directly using modern ES6 array methods such as .filter(), .map(), and .sort(). Preview query results in real time before applying them to your active document.
📊 Two-Way CSV Conversion
Convert tabular JSON arrays into CSV spreadsheets for Excel analysis, or drag and drop raw CSV files to automatically generate structured JSON arrays of objects.
🔒 100% Client-Side Privacy Guarantee
Zero payloads, tokens, or configuration strings ever leave your device. All formatting, diffing, and transformations execute exclusively inside your local browser memory.