Free online utilities for developers, designers, and everyday use
No tools found. Try a different search term.
Escape or unescape backslash sequences in text
Encode text to Base64 or decode Base64 strings
Format, validate, and beautify JSON with syntax highlighting
Convert timestamps to human-readable dates and vice versa
Convert CSV data to JSON array format
Test and debug regular expressions with live matching
Encode or decode URL components and query strings
Decode and inspect JSON Web Tokens
Convert JSON data to YAML format
Convert YAML data to JSON format
Encode or decode HTML entities and special characters
Convert JSON arrays to CSV format
Compare two JSON documents and highlight differences
Minify JSON by removing whitespace and formatting
Test JSONPath expressions against JSON data
Parse and explain cron schedule expressions
Generate random UUIDs (v4) instantly
Generate SHA-256, SHA-512, and other hash digests
Browse and search all HTTP status codes
Format and beautify SQL queries
Count words, characters, sentences, and paragraphs
Convert text between camelCase, snake_case, and more
Generate placeholder text for designs and layouts
Compare two texts and highlight differences
Reverse any text string instantly
Convert text to URL-friendly slugs
Write Markdown and see a live preview
Find and replace text with optional regex support
Sort lines of text alphabetically or numerically
Remove duplicate lines from text
Truncate text to a specific length with ellipsis
Convert text to binary and binary to text
Clean up extra whitespace from text
Convert text to NATO phonetic alphabet
Generate random strings with custom options
Browse and copy Unicode characters and symbols
Browse and copy emojis by category
Convert text to ASCII art with different fonts
Convert text to Morse code and back
Generate HTML meta tags for SEO
Generate Open Graph meta tags for social sharing
Generate robots.txt files for search engines
Generate XML sitemaps for search engines
Analyze keyword frequency and density in text
Preview how your page appears in Google search results
Generate canonical URL tags to prevent duplicate content
Generate JSON-LD structured data for rich results
Check URL redirects and redirect chains
Interactive checklist for optimizing page speed
Analyze HTML heading hierarchy for SEO
Generate Twitter Card meta tags for X/Twitter sharing
Calculate percentages, increases, and decreases
Convert between binary, octal, decimal, and hex
Convert between common units of measurement
Calculate and maintain aspect ratios
Convert between bytes, KB, MB, GB, and TB
Convert between standard and scientific notation
Generate random numbers within a range
Calculate factorials and permutations
Calculate greatest common divisor and least common multiple
Convert between Roman numerals and decimal numbers
Calculate mean, median, mode, and standard deviation
Convert between hexadecimal and decimal numbers
Convert colors between HEX, RGB, and HSL
Generate harmonious color palettes from a base color
Check WCAG color contrast ratios for accessibility
Create CSS linear and radial gradients visually
Design CSS box shadows with a visual editor
Preview and generate CSS border-radius values
Convert between px, rem, em, vh, and vw
Simulate how colors look with color vision deficiency
Generate placeholder images for mockups and development
Convert SVG code to CSS background-image data URI
Get font pairing suggestions for your designs
Convert Tailwind CSS classes to plain CSS
Find the closest named color for any hex value
Stay focused with the Pomodoro technique timer
Generate QR codes for URLs, text, and more
Generate strong, secure passwords
Check how strong your password is
Validate email address format and syntax
Look up information about any IP address
Convert time between different timezones
Calculate days between dates or add/subtract days
Calculate your exact age in years, months, and days
Set a countdown timer with alarm
Precise stopwatch with lap timing
View current time across multiple timezones
Quick notepad with auto-save to browser
Create and manage interactive checklists
Convert text to spoken audio using browser speech synthesis
Calculate your Body Mass Index
Calculate compound interest and investment growth
Calculate monthly payments and total loan cost
Calculate tips and split bills easily
Convert between world currencies with live rates
Calculate sales tax on purchases
Calculate return on investment
Plan how to reach your savings target
Create professional invoices quickly