Calculate percentages: what is X% of Y, X is what % of Y, or percentage change between two values.

Calculate compound interest: final amount, total interest earned, and year-by-year breakdown.

Calculate Body Mass Index (BMI) and get the corresponding weight category.

Calculate exact age from a birthdate: years, months, days, and next birthday countdown.

Calculate tip amount and total bill, optionally split between multiple people.

Calculate the discounted price, amount saved, and effective discount percentage.

Calculate gross profit margin, markup percentage, and net profit from cost and revenue.

Convert between hourly, daily, weekly, monthly, and annual salary figures.

Calculate monthly loan payment, total interest, and amortization for any loan.

Calculate the break-even point in units and revenue from fixed costs, variable costs, and selling price.

Calculate selling price from cost and markup percentage, or find the markup from cost and price.

Calculate the area of common shapes: rectangle, circle, triangle, trapezoid, ellipse, and more.

Calculate total fuel cost and cost per kilometre/mile for a trip.

Calculate the inflation-adjusted value of money between any two years (1913–2024).

Calculate daily calorie needs (TDEE) based on age, gender, weight, height, and activity level.

Convert between units of length, weight, temperature, volume, speed, area, and data storage.

Convert numbers between binary, octal, decimal, and hexadecimal.

Convert between Roman numerals and integers (1–3999).

Convert any number to its written English word form (e.g. 1234 → "one thousand two hundred thirty-four").

Convert colors between HEX, RGB, HSL, HSV, and CMYK formats.

Encode text to Base64 or decode Base64 back to text.

Generate MD5, SHA-1, SHA-256, SHA-384, or SHA-512 hash of any text.

Generate one or more UUIDs (v4, cryptographically random).

Format, validate, and minify JSON. Returns pretty-printed JSON or a minified version.

Encode or decode URL components and full URLs.

Encode special characters to HTML entities or decode HTML entities back to characters.

Test a regular expression against text. Returns all matches, groups, and match positions.

Decode a JWT token and display its header, payload, and expiry status. Does not verify signature.

Convert Unix timestamps to human-readable dates and vice versa.

Format and beautify SQL queries with proper indentation and keyword casing.

Minify CSS, JavaScript, or HTML by removing whitespace and comments.

Convert between HEX color codes and RGB values.

Parse a cron expression into plain English and show the next 5 execution times.

Count words, characters, sentences, paragraphs, and reading time for any text.

Convert text to UPPERCASE, lowercase, Title Case, camelCase, snake_case, kebab-case, or PascalCase.

Compare two texts and show the differences line by line.

Generate lorem ipsum placeholder text in paragraphs, sentences, or words.

Convert any text to a URL-friendly slug (lowercase, hyphens, no special characters).

Check if a word or phrase is a palindrome (reads the same forwards and backwards).

Reverse text character by character, word by word, or line by line.

Remove duplicate lines from text, optionally case-insensitive.

Sort lines of text alphabetically, by length, or in reverse.

Convert text to Morse code or decode Morse code back to text.

Count characters with and without spaces, and get character frequency breakdown.

Calculate the number of days between two dates, or add/subtract days from a date.

Convert a time from one time zone to another. Handles daylight saving automatically.

Convert Unix timestamps to human-readable dates and back, in any timezone.

Find the ISO week number for any date, and the date range of any week number.

Calculate duration between two times, or add a duration to a time.

🌐 Network tool: resolves DNS records for a domain. Makes a DNS query to resolve A, MX, TXT, and NS records.

🌐 Network tool: fetches HTTP response headers from any URL. Makes an HTTP HEAD request to the target URL.

🌐 Network tool: checks if a website is up or down. Makes an HTTP request to the target URL.

🌐 Network tool: resolves a hostname to its IP address, or looks up geolocation for an IP. Makes a DNS query and optional geolocation API call.

🌐 Network tool: fetches a URL and extracts Open Graph and Twitter Card meta tags for social sharing preview.