Convert temperature between Celsius, Fahrenheit, and Kelvin.
Generate a QR code from text or a link.
Count the number of words in a sentence easily.
Calculate your academic GPA easily.
Calculate the carbon emissions of your flight.
Calculate your exact age in years, months, and days from your birthdate.
Calculate the difference in days, weeks, and months between two dates.
Generate random numbers within your desired range — suitable for draws and games.
Convert time between major world time zones instantly.
Calculate what score you need on your final exam to reach your desired grade.
Generate strong, random passwords with customizable length and character types.
Count characters, words, sentences, and paragraphs with social media limit checks.
Format, beautify, validate, and minify JSON data instantly.
Set a countdown timer with hours, minutes, and seconds and get alerted when time is up.
Convert between Arabic and Roman numerals instantly in both directions.
Convert text between UPPER, lower, Title, camelCase, snake_case, and more.
Convert numbers between binary, octal, decimal, and hexadecimal instantly.
Calculate speed, distance, or time given the other two values.
Pick any color and get HEX, RGB, and HSL values instantly.
Calculate the aspect ratio of any width and height for screens, images, and videos.
Convert pixels to REM, EM, points, and viewport units for CSS.
Analyze text readability with Flesch-Kincaid and Gunning Fog formulas.
Convert points to percentage, letter grade, and GPA equivalent.
Test and debug regular expressions in real time with highlighted matches.
Check WCAG 2.1 AA/AAA color contrast compliance for text and backgrounds.
Write and preview Markdown in real time with live rendering.
Convert numbers to and from scientific notation with E-notation.
Generate SHA-256, SHA-512, and SHA-1 hashes from text instantly.
Calculate hours and minutes between two times or add/subtract durations.
Check your password strength, crack time, and entropy score.
Convert text to binary, hex, octal, and decimal — or binary back to text.
Estimate how long it takes to read or speak any text.
Create beautiful CSS gradients visually and copy the code.
Calculate pixels per inch and screen density for any display.