Free Online Developer Tools

All tools run entirely in your browser. No data is sent to any server. No signup required.

HTML & CSS Tools

Format, generate, and optimize your HTML and CSS code

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HTML Formatter & Minifier

Beautify, format, or minify your HTML code instantly. Supports indentation options and syntax highlighting.

HTML

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CSS Gradient Generator

Create beautiful CSS gradients visually. Linear, radial, multiple color stops with live preview and copy-ready code.

CSS

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Color Picker & Converter

Pick colors visually and convert between HEX, RGB, and HSL formats. Copy CSS color values instantly.

CSS

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CSS Box Shadow Generator

Design box shadows visually with controls for offset, blur, spread, color, and inset. Copy CSS code.

CSS

HTML Entity Encoder / Decoder

Encode special characters to HTML entities or decode them back. Supports named and numeric entities.

HTML

Encoding & Data Tools

Encode, decode, format, and validate data

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Base64 Encode / Decode

Encode text or files to Base64, or decode Base64 strings back to text. Supports image to Base64 conversion.

Developer

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URL Encoder / Decoder

Encode and decode URLs and query parameters. Essential for working with APIs and web applications.

Developer

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JSON Formatter & Validator

Format, beautify, and validate JSON data. Tree view, syntax highlighting, and detailed error messages.

JavaScript

Text & Code Tools

Generate, compare, and test text and code

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Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences, or words. HTML output with <p> tags option.

Developer

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Diff Checker

Compare two text blocks side by side with highlighted differences. Find additions, deletions, and changes.

Developer

Regex Tester

Test regular expressions with live matching and capture groups. Includes a library of common patterns.

Developer

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Schema Markup Generator

Generate JSON-LD structured data for Articles, FAQ, Products, and more. Boost your SEO with rich results.

SEO