Square Footage Calculator
Calculate square footage for rooms, floors, walls, and land. Supports rectangles, triangles, circles, and irregular shapes. Free and instant.
Percentage Calculator
Calculate percentages, percentage change, percentage difference, and more. Multiple calculation modes for everyday and professional use.
Age Calculator
Calculate exact age in years, months, days, hours, and minutes from any date. Find the difference between two dates instantly.
Base64 Decode
Decode Base64-encoded strings and files instantly in your browser. Supports standard and URL-safe Base64. No data sent to servers.
Base64 Encode
Encode text or files to Base64 format instantly. Supports standard and URL-safe Base64 encoding. Free and client-side.
URL Encode / Decode
URL encode and decode strings, query parameters, and full URLs. Handles all special characters and Unicode. Essential developer tool.
Password Strength Checker
Check the strength of any password instantly. Get detailed analysis, crack time estimates, and improvement suggestions. 100% client-side.
Everything you need for UUID generation, validation, and documentation
UUID v4 Generator
Cryptographically secure random UUIDs. The most widely used UUID version.
UUID v7 Generator
Sortable time-based UUIDs. RFC 9562 recommended for database primary keys.
Bulk UUID Generator
Generate up to 1,000 UUIDs at once in multiple formats. Download as text.
UUID Validator
Validate any UUID and identify its version, variant, and format compliance.