124 free tools. No signup required.
Generate unique identifiers instantly
Encode and decode Base64 instantly
Generate secure passwords
Format, validate and beautify JSON
Create SEO-friendly URLs
Generate SHA-1, SHA-256, and SHA-512 hashes
Convert between HEX, RGB, HSL
Generate placeholder text
Count words, characters, and reading time
Count characters, words, and lines
Convert text case instantly
Encode and decode URLs instantly
Encode and decode HTML entities
Convert Unix timestamps to dates
Calculate percentages instantly
Compare two texts and find differences
Preview and format Markdown
Convert JSON arrays to CSV
Validate JSON syntax instantly
Minify JSON for production
Convert CSV data to JSON
Parse URL components instantly
Decode JWT tokens client-side
Test regular expressions instantly
Minify HTML for production
Minify CSS for production
Minify JavaScript for production
Build URL query strings easily
Convert between meters, feet, inches, and more
Convert between grams, pounds, ounces, and more
Convert between Celsius, Fahrenheit, and Kelvin
Convert between m², ft², acres, hectares, and more
Convert between liters, gallons, pints, cups, and more
Convert between km/h, mph, m/s, and knots
Convert between seconds, minutes, hours, days, and weeks
Convert between bytes, KB, MB, GB, and binary units (KiB, MiB)
Convert between degrees, radians, and gradians
Convert between L/100km, km/L, MPG US, and MPG UK
Calculate final price after discount
Add or extract VAT from prices
Calculate profit, margin, and markup
Solve proportional relationships
Calculate mean, sum, min, max
Calculate age from birth date
Calculate days between two dates
Calculate Body Mass Index
Calculate monthly loan payments
Calculate tip and split bills
Add or subtract days, weeks, months, or years
Calculate working days between two dates
Count days until a future date
Find ISO week number for any date
Calculate duration between two times
Add or subtract hours and minutes
Live countdown to a target date and time
Show current Unix timestamp instantly
Convert time between different time zones
Find start and end date of an ISO week
Calculate percentage change between two values
Simplify and calculate ratios
Calculate price per single unit
Divide a bill among multiple people
Calculate simple interest on a loan or investment
Calculate compound interest with contributions
Calculate time to reach a savings goal
Convert hourly rate to annual salary
Convert annual salary to hourly rate
Calculate rate per single unit
Calculate Grade Point Average
Calculate weighted grades and needed scores
Advanced calculator with trigonometry and functions
Add, subtract, multiply, and divide fractions
Convert between binary, octal, decimal, and hexadecimal
Solve linear and quadratic equations
Calculate what you need on your final exam
Convert points to percentage and letter grade
Plan your study schedule
Calculate words per minute and reading time
Plan word count distribution for essays
Generate multiplication tables
Check if a number is prime
Convert between Roman and Arabic numerals
Calculate experimental error percentage
Find sin, cos, tan for common angles
Remove duplicate lines from text
Sort lines alphabetically or reverse
Reverse text characters or line order
Remove blank and empty lines
Remove leading and trailing whitespace
Repeat text multiple times
Add prefix or suffix to each line
Extract email addresses from text
Extract URLs from text
Count word occurrences in text
Convert HEX colors to RGB and RGBA
Convert RGB values to HEX color
Convert between HEX, RGB, and HSL
Generate color palettes from a base color
Generate CSS linear gradients
Check text contrast ratio for accessibility
Generate random colors instantly
Generate CSS box-shadow code
Generate CSS border-radius code
Generate CSS clamp() for fluid typography
Resize images in browser
Compress images in browser
Convert images to Base64 data URLs
Convert Base64 back to image
View image file information
Calculate aspect ratio from dimensions
Calculate dimensions for target aspect ratio
Generate PNG favicon from any image
Generate placeholder images
Pick colors from any image
Estimate DC or AC power, current and voltage
Estimate energy usage and optional cost
Estimate PV array daily and monthly output
Estimate solar panel capacity from energy use
Estimate battery runtime from usable capacity
Estimate required battery capacity
Estimate inverter size from connected loads
Estimate voltage drop in wire runs
Estimate cable cross-section from voltage drop
Estimate LED power and daily energy use
More tools coming soon.