How-To Guides
Step-by-step tutorials for the most popular developer tools.
How to Format JSON Online
Learn how to format, beautify, and validate JSON data in seconds. Paste raw JSON and get perfectly indented, human-readable output with error highlighting.
Read guideHow to Encode and Decode Base64
Quickly encode text or files to Base64 and decode Base64 strings back to plain text. Works entirely in the browser with no server upload.
Read guideHow to Generate UUIDs Online
Generate unique UUIDs (v1, v4, v7) online for databases, APIs, and distributed systems. Learn which version to use and why.
Read guideHow to Test Regular Expressions Online
Test and debug regex patterns with real-time matching, group highlighting, and a cheat sheet. Supports JavaScript, Python, and Go flavors.
Read guideHow to Generate a Strong Password
Generate cryptographically secure passwords with customizable length, character sets, and entropy display. All generation happens locally in your browser.
Read guideHow to Decode JWT Tokens Online
Decode and inspect JWT (JSON Web Token) headers, payloads, and signatures. Verify expiration, claims, and algorithm details without any libraries.
Read guideHow to Convert JSON to CSV
Convert JSON arrays to CSV spreadsheet format with automatic column detection, nested object flattening, and custom delimiters.
Read guideHow to Format SQL Queries Online
Format and beautify SQL queries with proper indentation, keyword capitalization, and consistent style. Supports MySQL, PostgreSQL, SQLite, and more.
Read guideHow to Generate Hash Values Online
Generate MD5, SHA-1, SHA-256, and SHA-512 hashes from text or files. Understand when to use each algorithm and their security implications.
Read guideHow to Convert HTML to Markdown
Convert HTML pages, blog posts, and documentation to clean Markdown format. Handles headings, links, images, tables, and code blocks.
Read guideHow to Build Cron Expressions
Build and understand cron expressions with a visual editor. Preview next run times and convert between crontab syntax and human-readable schedules.
Read guideHow to Convert Color Formats
Convert colors between HEX, RGB, HSL, CMYK, and CSS named colors. Includes a color picker and accessibility contrast checker.
Read guideHow to Generate QR Codes Online
Generate QR codes for URLs, text, Wi-Fi credentials, vCards, and more. Customize colors, size, and error correction level. Download as PNG or SVG.
Read guideHow to Build CSS Gradients
Create beautiful CSS linear, radial, and conic gradients with a visual editor. Adjust colors, stops, angles, and copy production-ready CSS code.
Read guideHow to Use CSS Flexbox
Learn CSS Flexbox with an interactive visual playground. Experiment with flex-direction, justify-content, align-items, and more with instant visual feedback.
Read guideHow to Generate Meta Tags for SEO
Generate complete meta tags for SEO, Open Graph, Twitter Cards, and structured data. Preview how your page appears in Google, Facebook, and Twitter.
Read guideHow to Calculate Chmod Permissions
Calculate Unix file permissions with a visual chmod calculator. Convert between numeric (755) and symbolic (rwxr-xr-x) notation with a clear breakdown.
Read guideHow to URL Encode and Decode
Encode special characters for safe use in URLs or decode percent-encoded strings back to readable text. Handles UTF-8, query parameters, and full URIs.
Read guideHow to Build a Docker Compose File
Generate Docker Compose YAML files with a visual builder. Configure services, volumes, networks, environment variables, and health checks without memorizing the syntax.
Read guideHow to Convert Unix Timestamps
Convert Unix timestamps to human-readable dates and vice versa. Supports seconds, milliseconds, ISO 8601, RFC 2822, and timezone conversions.
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