Free Developer Tools

Programming Tools

Format JSON, HTML, CSS, JavaScript, compare text, and highlight code from one simple page.

100% FreeNo sign-upInstant outputRuns in browser
Choose a tool and paste your code below

Ready-to-use tools

Pick a tool and start

Start here: choose a tool, paste your code or text, then copy the output.

JSON Formatter

Beautify and validate JSON instantly.

Input
Output

Popular use cases

Format JSON before using it in your project
Minify JSON to reduce size
Beautify HTML, CSS, and JavaScript
Compare two versions of text or code
Highlight code snippets for readability
Convert CSS rules into inline-style format

Built for developers and students

Free

Use developer tools without creating an account.

Fast

Paste your text and get instant output.

Practical

Useful for students, developers, and website owners.

How to use

How to use the Programming Tools

Choose the tool you need from the side menu, then paste your code or text to get the result instantly.

01

Choose a tool

Select JSON, HTML, CSS, JavaScript formatter, or text comparison.

02

Paste code

Add your code or text into the input area for the selected tool.

03

Review output

The formatted result or comparison will appear instantly in the output panel.

04

Copy the result

Copy the output and use it in your project or code editor.

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