Utill.net
Free online utilities for encoding, encryption, formatting, and more.
Encode & Decode
Base64 Encode/Decode
Convert text to Base64 or decode Base64 back to text.
Unicode Encode/Decode
Convert text to Unicode escape sequences or decode them.
URL Encode/Decode
Encode or decode URL strings for safe web transmission.
JWT Decoder
Decode JSON Web Tokens and inspect header, payload, and signature.
Number Base Converter
Convert numbers between decimal, hexadecimal, octal, and binary.
HTML Entity Converter
Encode and decode HTML entities for safe web display.
Backslash Escape
Escape and unescape backslash sequences in strings.
Security
Generators
UUID Generator
Generate universally unique identifiers (v4).
Hash Generator
Generate MD5, SHA-256, SHA-512 and other cryptographic hashes.
QR Code Generator
Generate QR codes from text or URLs.
IndexNow Key Generator
Generate a key for the IndexNow search engine notification protocol.
Lorem Ipsum Generator
Generate placeholder text for design and development.
URL Slug Generator
Generate URL-friendly slugs from text with custom separators.
Formatters
JSON Formatter
Prettify or minify JSON data with adjustable indentation.
Diff Checker
Compare two texts and highlight the differences line by line.
Text Case Converter
Convert text between camelCase, snake_case, kebab-case, and more.
YAML / JSON Converter
Convert between YAML and JSON formats bidirectionally.
SQL Formatter
Format and beautify SQL queries with dialect support.
Converters
Unix Timestamp Converter
Convert Unix timestamps to dates and vice versa.
Cron Expression Parser
Parse cron expressions into human-readable schedules.
CSS Unit Converter
Convert between px, rem, em, and pt with configurable base size.
Image to Base64
Convert images to Base64 data URIs for embedding in code.
Aspect Ratio Calculator
Calculate aspect ratios and resize dimensions proportionally.