// how-to

How-to guides

Step-by-step instructions for common developer tasks, with free tools to do them.

How to Convert Between Color Formats

Convert colors between HEX, RGB, HSL, and other formats instantly. Paste any color value and get it in every supported format.

Create QR codes from any text, URL, or data. Customize size and format, then download or copy your QR code instantly.

Create beautiful CSS gradients with a visual editor. Choose colors, direction, and gradient type to generate ready-to-use CSS code.

Transform CSV spreadsheet data into a JSON array of objects, using the first row as property keys.

Transform JSON objects and arrays into clean, readable YAML format for use in configuration files.

Inspect and decode JSON Web Tokens to view the header, payload, and signature without any server-side processing.

Encode text or binary data to Base64, or decode Base64 strings back to their original content.

Format messy or minified JSON into readable, properly indented output using a free browser-based tool.

Create MD5 checksums for text strings or verify data integrity by comparing hash values.

Generate random UUIDs (v4) or time-based UUIDs (v7) for use as unique identifiers in databases, APIs, and applications.

Compress CSS by removing whitespace, comments, and unnecessary characters to reduce file size.

Write and test regular expressions with real-time match highlighting and capture group display.

Check if your JSON is valid and get precise error messages with line numbers for any syntax issues.