{DT}DevToolkit

JSON Tools

8 free tools available

Complete JSON toolkit for developers. Format and beautify JSON with multiple indent options, compare and merge JSON objects side-by-side, build JSON structures visually, test JSONPath expressions, convert JSON to TypeScript interfaces, generate mock data from JSON Schema, and export to CSV or SQL.

Visual Builder

Build JSON structures with drag-and-drop

Drag-and-dropVisual editingReal-time preview

Diff & Merge

Compare and merge JSON objects side-by-side

Side-by-side viewHighlighted differencesMerge support

Formatter

Format, beautify, and validate JSON

Multiple indent stylesMinificationValidation

Schema to Mock

Generate realistic mock data from JSON Schema

Schema validationRealistic dataCustom generators

Path Tester

Test JSONPath expressions with live results

Live resultsSyntax highlightingPath suggestions

To TypeScript

Convert JSON to TypeScript interfaces

Interface generationOptional propertiesNested types

To CSV

Export JSON arrays to CSV format

Custom delimitersNested handlingHeader options

To SQL

Generate SQL from JSON data

INSERT generationTable inferenceMultiple dialects

About JSON Tools

Complete JSON toolkit for developers. Format and beautify JSON with multiple indent options, compare and merge JSON objects side-by-side, build JSON structures visually, test JSONPath expressions, convert JSON to TypeScript interfaces, generate mock data from JSON Schema, and export to CSV or SQL.

Features

  • Free Forever: All tools are completely free with no hidden costs or premium features.
  • Privacy First: Your data never leaves your browser. All processing happens client-side.
  • No Sign-up Required: Start using any tool immediately without creating an account.
  • Fast & Reliable: Tools load instantly and work offline once loaded.

Available Tools