All JSON tools

26 free, browser-only JSON tools. Search by name, keyword, or category.

Validators & Formatters

— Check JSON syntax, clean up messy input, and reshape documents without losing data.

Validator & Formatter

Catch syntax errors instantly and format JSON in one click.

Beautifier

Pretty-print minified JSON with the indentation you prefer.

Minifier

Shrink JSON payloads to save bandwidth and storage.

Diff

Spot every difference between two JSON documents in seconds.

Tree Viewer

Navigate large JSON files visually without scrolling forever.

Sorter

Make JSON deterministic by sorting keys at every depth.

Size Analyzer

Find the keys that bloat your API responses.

Escape

Safely embed JSON inside HTML, attributes, or other strings.

Schema & Query

— Enforce contracts with JSON Schema, query documents with JSONPath, and inspect tokens.

Schema Validator

Enforce contracts on your API request and response payloads.

Schema Generator

Bootstrap a contract from a real example in one click.

JSONPath

Query deeply nested JSON without writing a parser.

JWT Decoder

Inspect JWT headers and claims before you trust them.

Converters

— Move data between JSON and CSV, YAML, XML, SQL, Excel and other formats your tools expect.

JSON → CSV

Turn a JSON array into a spreadsheet-friendly CSV.

CSV → JSON

Turn a spreadsheet back into JSON for your API or script.

JSON → YAML

Clean YAML output for Kubernetes, Ansible, and CI tools.

YAML → JSON

Turn YAML configs back into JSON for tools that need it.

JSON → XML

Bridge modern JSON APIs and legacy XML systems.

XML → JSON

Migrate legacy XML APIs to modern JSON without writing code.

JSON → SQL

Bulk-load JSON data into a SQL database in seconds.

SQL → JSON

Turn SQL INSERT statements back into JSON for APIs.

JSON → Excel

Export JSON directly to a real .xlsx file, no Excel required.

Code Generators

— Turn sample JSON into typed classes for TypeScript, Java, Python, C# and Go.

JSON → TypeScript

Stop hand-writing TypeScript interfaces for API responses.

JSON → Java

Skip the boilerplate of mapping JSON to Java classes by hand.

JSON → Python

Generate typed Python classes from any JSON payload.

JSON → C#

Generate C# records or classes for any JSON payload.

JSON → Go

Skip the boilerplate of writing Go struct tags by hand.