All tools
Browse every tool on U5F, or search and filter to narrow things down.
JSON Formatter
Format, validate, and beautify JSON data online.
UUID Generator
Generate RFC 4122 v4 UUIDs in bulk, instantly.
Regex Tester
Test and debug regular expressions against sample text.
SQL Formatter
Format SQL statements for readability in the browser.
JavaScript Formatter
Format JavaScript snippets for readability without leaving your browser.
Base64 Encoder
Encode or decode Base64 strings instantly.
Timestamp Converter
Convert Unix timestamps to and from human-readable dates.
Hash Generator
Generate a SHA-256 hash of any text, entirely in your browser.
Case Converter
Convert text between UPPERCASE, lowercase, Title Case, kebab-case, and snake_case.
CSS Minifier
Strip comments and whitespace from CSS to shrink file size.
Image Compressor
Compress JPG, PNG, or WebP images without leaving your browser.
File Hash Checker
Compute the SHA-256 hash of any file to verify its integrity.
UUID v7 Generator
Generate time-ordered UUID v7 values directly in the browser.
UUID Validator
Validate UUID strings and confirm their shape in the browser.
NanoID Generator
Generate compact NanoID values for applications and test data.
ULID Generator
Generate sortable ULID strings entirely in the browser.
Regex Generator
Generate common regex patterns for email, URLs, slugs, and more.
URL Encoder / Decoder
Encode or decode URL-safe strings and query components.
HTML Encoder / Decoder
Encode or decode HTML entities for safe rendering.
Unix Time Now
Show the current Unix timestamp in seconds and milliseconds.
Timezone Converter
Convert a date to another timezone using the browser's locale support.
Date Difference Calculator
Calculate the number of days between two dates.
Age Calculator
Compute a person's age from a birth date.
JSON Validator
Verify whether a JSON payload is valid and explain any issues.
JSON Minifier
Remove whitespace from JSON payloads to make them compact.
JSON Compare
Compare two JSON values and report whether they are equal.
YAML ↔ JSON Converter
Convert between simple YAML and JSON structures.
CSV ↔ JSON Converter
Convert comma-separated values to JSON or back.
JWT Decoder
Decode JWT header and payload segments directly in the browser.
JWT Inspector
Inspect JWT claims and explain common values like expiry.
JWT Expiration Checker
Check whether a JWT is expired or still valid.
HMAC Generator
Generate an HMAC signature using a secret and message.
Password Generator
Generate secure passwords with a configurable length.
Password Strength Checker
Rate the strength of a password and explain the result.
Random String Generator
Generate random alphanumeric strings of a chosen length.
Random Number Generator
Generate random integers within a chosen range.
Dice Roller
Roll dice and get totals instantly in the browser.
Coin Flip
Flip a virtual coin and get a result in an instant.
Lorem Ipsum Generator
Generate placeholder text for mockups and UI work.
Slug Generator
Turn any title into a URL-friendly slug.
Text Diff Checker
Compare two text blocks and highlight the differences.
Word Counter
Count words in a block of text instantly.
Character Counter
Count characters with or without spaces.
Line Counter
Count the number of lines in a block of text.
Hex ↔ RGB Converter
Convert hex colors to RGB values and back again.
Color Picker
Normalize a color value into hex, RGB, and HSL formats.
Color Palette Generator
Generate a small palette from a base color quickly.
CSS Gradient Generator
Create a linear-gradient snippet from two colors.
CSS Box Shadow Generator
Generate CSS box-shadow snippets from simple values.
CSS Border Radius Generator
Generate border-radius CSS from one or four values.
CSS Transform Generator
Generate simple CSS transformations from a few values.
CSS Grid Generator
Generate a simple CSS grid layout snippet for a grid template.
HTML Beautifier
Pretty-print HTML snippets so they are easier to read.
HTML Minifier
Strip whitespace from HTML to make it more compact.
Markdown Preview
Render a simple Markdown preview straight in the browser.
Markdown → HTML
Convert Markdown to HTML without any server round-trip.
URL Parser
Parse a URL and inspect its components in the browser.
Query String Parser
Parse query strings into a readable object format.