Free tools by Wellsoft Solutions
Free, private JSON tools that run in your browser
Format, validate, fix, inspect and convert JSON. Fast developer utilities with no sign-up and no uploads.
Tools
Pick a tool
For developers
JSON tools
Format, validate, fix, inspect and convert JSON in your browser. Your data never leaves your device.
Start hereJSON formatterFormat, validate, minify and fix JSON privately in your browser.Format and validate JSONFormat and fix
View and inspect
- JSON viewerCollapsible tree with search and copyable paths.
- Large JSON file viewerOpen 100MB+ JSON files in the browser.
- JSON diffCompare two JSON documents and see what changed.
- JSONPath testerEvaluate JSONPath expressions against your data.
- JSON secret scannerFind API keys and secrets before you share JSON.
Schema
Code generators
- JSON to TypeScriptGenerate TypeScript interfaces from JSON.
- JSON to ZodGenerate a Zod schema from JSON.
- JSON to Python dataclassGenerate Python dataclasses from JSON.
- JSON to Go structGenerate Go structs with JSON tags.
- JSON to Java recordGenerate Java records from JSON.
- JSON to C# classGenerate C# classes from JSON.
- JSON to Rust structGenerate serde-ready Rust structs.
- JSON to Kotlin data classGenerate Kotlin data classes from JSON.
- JSON to Swift CodableGenerate Swift Codable structs from JSON.
Converters
- JSON to CSVFlatten nested JSON into CSV rows.
- CSV to JSONTurn CSV files into JSON arrays.
- JSON to YAMLConvert JSON to readable YAML.
- YAML to JSONConvert YAML to JSON.
- JSON to XMLConvert JSON to XML.
- XML to JSONConvert XML to JSON, handling attributes and arrays.
- JSON to TOMLConvert JSON to TOML config.
- TOML to JSONConvert TOML to JSON.
- JSON to SQLGenerate CREATE TABLE and INSERT statements.
Why use these tools
Built to be fast and private
- Free to use, with no sign-up or account
- Runs in your browser; your data stays on your device by default
- Instant results that update as you type
- Your JSON is never uploaded or stored on a server
Built by Wellsoft Solutions
We build business software for inventory, sales and the books. These tools are our way of giving something back.
Visit wellsoftsolutions.com