Free developer tools

Free developer tools for JSON, SQL, and code

Clean API data, format database queries, generate model classes, and edit code snippets from one fast static website.

Choose a tool

Format JSON, format SQL, convert JSON to C# or Java models, and edit code snippets with free browser developer tools.

JSN

JSON Formatter

Format, minify, and validate JSON directly in your browser.

Open JSON Formatter
SQL

SQL Formatter

Format SQL queries for standard SQL, MySQL, PostgreSQL, and T-SQL.

Open SQL Formatter
C#

JSON to C# / Java

Convert sample JSON into C# classes or Java POJOs.

Open JSON to C# / Java
IDE

Syntax Editor

Edit highlighted code with a VS Code-style Monaco editor.

Open Syntax Editor

Common uses

API and data work

Format JSON responses, validate config snippets, and generate starter C# or Java models.

Code review and notes

Format SQL and edit highlighted code before sharing it in tickets, docs, or pull requests.

FAQ

Do these developer tools execute code?

No. They format, validate, generate, or edit text, but they do not execute your code.

Can I use them for private snippets?

The tools run in your browser, but avoid pasting secrets into any website unless you trust the environment.

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