Developer Tools

Format, validate, and beautify JSON data

Encode and decode Base64 strings

Test and debug regular expressions in real-time

Encode and decode URL strings

Build and explain cron expressions visually

Decode and inspect JSON Web Tokens

Encode and decode HTML entities

Format and beautify SQL queries

Pick colors with HEX, RGB, HSL output and WCAG contrast checker

Create beautiful CSS gradients with a visual editor — linear, radial, and conic

Build and test cron expressions visually with human-readable descriptions and next run times

Generate professional GitHub README.md files with live preview

Visual cron expression builder with human-readable explanations

Calculate Unix file permissions in numeric and symbolic notation

Find the right git command for any scenario with copy-paste examples

Check if APIs and websites are responding with response time metrics

Convert between pixel and REM units with customizable base font size

Convert between binary code and text, with support for ASCII, UTF-8, and hex

Convert between Unix timestamps and human-readable dates with timezone support