About

About JSON Tools: 15 free online JSON utilities in 16 languages. All processing runs locally in your browser — your data never leaves your device.

What is this?

JSON Tools is a free collection of online JSON developer utilities: format, minify, validate, extract, generate test data, visualize, and convert between JSON and YAML/XML/CSV/TOML/Properties/Markdown/SQL/Code/JSON Schema.

Tools

15 utilities covering common JSON processing and format-conversion scenarios.

{}

JSON Formatter

Pretty-print JSON: indentation, key sorting, escape options, error position

–

JSON Minify

Remove whitespace and newlines, output minified JSON

✓

JSON Validator

Syntax validation with precise error location (line:column)

⌕

JSON Extractor

Pick values from the tree or use JSONPath to extract any JSON value

✎

Test Data Generator

Paste a sample JSON, fields are inferred and test data is generated in bulk

≡

JSON Visualizer

Browse JSON structure as a tree with node statistics

Y

JSON ↔ YAML

Two-way conversion between JSON and YAML

X

JSON ↔ XML

Two-way conversion between JSON and XML

C

JSON ↔ CSV

Two-way conversion between JSON and CSV with nested key flattening

T

JSON ↔ TOML

Two-way conversion between JSON and TOML

P

JSON ↔ Properties

Two-way conversion between JSON and .properties files

MD

JSON → Markdown Table

Turn an array of objects into a Markdown table in one click

SQL

JSON → SQL

Generate CREATE TABLE and bulk INSERT from JSON

TS

JSON → Code

Generate TypeScript / Go / Python / Java / PHP / C# types or literals

SC

JSON → JSON Schema

Infer a JSON Schema from a sample JSON

Privacy

Every tool runs locally in your browser. Your data is never uploaded to any server, so feel free to paste real business data.

Tech stack

Built with Vue 3 + Vite, 16-language UI, 8 themes, and multi-language static pre-rendering for SEO.

Contact & feedback

Questions or suggestions? Email us: Feedback