All tools

Utilities

81 free tools, no sign-up needed.

• Age Calculator — Exact age and days until your next birthday.
• API Key Generator — Batches of random secret keys — pick bit strength, character set, and prefix.
• Area of Shapes — Area of rectangles, triangles, circles, and more.
• Average (Mean) — Mean, median, and mode of a list of numbers.
• Base64 — Encode or decode Base64 text.
• BMI — Body Mass Index from height and weight, metric or imperial.
• Calculator — Quick arithmetic with parentheses and percentages.
• Card Validator — Luhn check and card type for an account number.
• Carpet Estimator — Area and cost of carpet needed for a room.
• Case Converter — UPPER, lower, Title, camelCase, snake_case, kebab-case.
• Circle Calculator — Area, circumference, and diameter of a circle.
• Coin Flip — Flip a coin and keep a running tally.
• Color Converter — Convert between HEX, RGB, and HSL with a live swatch.
• Combinations & Permutations — nCr and nPr for choosing from a set.
• Concrete Estimator — Volume of concrete needed for a slab or footing.
• Color Contrast — Check WCAG contrast between two colors.
• CSV ↔ JSON — Convert CSV to JSON and back.
• Dice Roller — Roll any number of dice with any number of sides.
• Text Diff — Compare two texts and see what changed.
• Dilution Calculator — Solve C1V1 = C2V2 for concentration and volume.
• Powers & Logarithms — Powers, roots, natural log, and log base 10.
• Factorial — Compute n! for any n up to 170.
• Fibonacci Sequence — Generate the first N Fibonacci numbers (big-int safe).
• Flooring Estimator — Boxes or area of flooring needed for a room.
• Fraction Calculator — Add, subtract, multiply, and simplify fractions.
• GCD & LCM — Greatest common divisor and least common multiple.
• GPA Calculator — Compute your GPA from grades and credits.
• Grade Needed — The final exam score needed to reach a target grade.
• Gradient — Build a CSS gradient and copy it.
• Hash Generator — SHA-1/256/384/512 hashes of any text.
• JSON Formatter — Validate, beautify, or minify JSON.
• Line Tools — Sort, dedupe, reverse, number, and clean up lines.
• List Shuffler — Shuffle a list into random order.
• Lorem Ipsum — Generate placeholder paragraphs.
• Lottery Numbers — Draw k unique numbers from a range.
• Luhn Validator — Validate card-style numbers with the Luhn checksum.
• Markdown Preview — Write markdown and see it rendered live.
• Modulo Calculator — Remainder and integer quotient of a ÷ b.
• Morse Code — Translate text to and from Morse code.
• Name Generator — Random identities by gender, culture name set, and country.
• Number Sequence — Arithmetic or geometric progressions.
• Running Pace — Pace and speed from distance and time.
• Paint Estimator — Litres of paint needed to cover a wall area.
• Color Palette — Generate a palette of tints, shades, and a complement.
• Passphrase Generator — Memorable multi-word passphrases (Diceware-style).
• Password Generator — Strong random passwords with length and character options.
• Percentage — Percent of a number, what-percent, and percentage change.
• PIN Generator — Random numeric, letter, mixed, or strong PIN codes.
• PPI Calculator — Pixels per inch from resolution and screen size.
• Prime Checker — Check if a number is prime and find its factors.
• Proportion Solver — Solve for the missing value in an A:B = C:D proportion.
• QR Code — Generate a QR code from any text or URL.
• Quadratic Solver — Roots of ax² + bx + c = 0.
• Randomizer — Flip a coin, roll a die, pick a random number, or choose from a list.
• Random Picker — Pick one or more random items from your list.
• Random String — Custom-length random string from chosen character sets.
• Ratio Calculator — Simplify, scale, and solve ratios.
• Readability — Flesch reading ease and grade level for any text.
• Recipe Scaler — Scale ingredient amounts up or down by servings.
• Regex Tester — Test a regular expression against text and see matches.
• Rounding Tool — Round, floor, and ceil to a chosen precision.
• Scientific Notation — Convert numbers to and from scientific notation.
• Scratchpad — A quick notes pad that saves automatically and waits for you.
• Slope & Line — Slope, intercept, and equation from two points.
• Slug Generator — Turn any title into a clean URL slug.
• Soil Estimator — Cubic metres of soil or mulch for a garden bed.
• Speed, Distance, Time — Solve for speed, distance, or time given the other two.
• Standard Deviation — Standard deviation and variance of a data set.
• Sum & Count — Total, count, and running stats for a list of numbers.
• Calories (TDEE) — Estimate your daily calorie needs from BMR + activity.
• Team Picker — Randomly split names into balanced teams.
• Test Score — Percentage and grade from correct answers out of total.
• Tile Estimator — Number of tiles needed for a floor or wall area.
• Time Card — Total worked hours from clock-in and clock-out times.
• Triangle Solver — Solve triangle sides and angles from known values.
• URL Encode — Encode or decode URL-safe text.
• Username Generator — Generate catchy available-looking usernames from your word plus a themed category word.
• UUID Generator — Generate random UUIDs (v4).
• Volume of Shapes — Volume of boxes, cylinders, spheres, and cones.
• Wallpaper Estimator — Rolls of wallpaper needed for a room.
• Word Counter — Words, characters, sentences, and reading time for any text.