Free online tools
198 tools that run in your browser — converters, calculators, generators and formatters. All free, none of them behind a sign-up. Xenition's chat can also run any of them for you and carry the answer into your work.
- Acceleration Converter — Convert between m/s², g-force, and ft/s².
- Angle Converter — Convert between degrees, radians, and gradians.
- Area Converter — Convert between square metres, acres, hectares, and square feet.
- Aspect Ratio — Simplify a width×height ratio and scale dimensions.
- Blood Sugar Converter — Convert blood glucose between mg/dL and mmol/L.
- Clothing Size Converter — Convert clothing sizes between UK, US, and EU.
- Cooking Volume Converter — Convert between cups, tablespoons, teaspoons, and millilitres.
- Data Rate Converter — Convert between bps, Kbps, Mbps, and Gbps.
- Data Size Converter — Convert between bytes, KB, MB, GB, and TB.
- Energy Converter — Convert between joules, calories, kWh, and BTU.
- Flow Rate Converter — Convert between litres/min, m³/h, and gallons/min.
- Force Converter — Convert between newtons, pound-force, and kilogram-force.
- Frequency Converter — Convert between Hz, kHz, MHz, and GHz.
- Fuel Economy Converter — Convert between mpg, km/l, and litres/100 km.
- Length Converter — Convert between metres, feet, miles, inches, and more.
- Metric Prefix Converter — Convert between kilo, milli, mega, micro, and more.
- Number Base — Convert between binary, octal, decimal, and hexadecimal.
- Number to Words — Spell out a number in English.
- Oven Temperature Converter — Convert between Celsius, Fahrenheit, and gas marks.
- Power Converter — Convert between watts, kilowatts, and horsepower.
- Pressure Converter — Convert between pascals, bar, psi, and atmospheres.
- Roman Numerals — Convert between numbers and Roman numerals.
- Shoe Size Converter — Convert shoe sizes between UK, US, and EU.
- Speed Converter — Convert between km/h, mph, m/s, and knots.
- Temperature — Convert between Celsius, Fahrenheit, and Kelvin.
- Time Unit Converter — Convert between seconds, minutes, hours, days, and weeks.
- Torque Converter — Convert between newton-metres and pound-feet.
- Typography Converter — Convert between points, pixels, ems, and rems.
- Unit Converter — Length, mass, volume, area, speed, and data units.
- Volume Converter — Convert between litres, gallons, cups, and millilitres.
- Weight Converter — Convert between kilograms, pounds, ounces, and stones.
- Air Quality — Live US AQI and PM levels for your location.
- Body Fat % — Estimate body fat percentage from measurements.
- Body Surface Area — Estimate BSA from height and weight.
- Due Date Calculator — Estimate a pregnancy due date and current week.
- Habit Cost — The yearly cost of a daily or weekly habit.
- Heart Rate Zones — Training zones from your max and resting heart rate.
- Ideal Weight — Estimate a healthy weight range for your height.
- Lean Body Mass — Estimate lean mass from weight and body fat.
- Macro Calculator — Daily protein, carbs, and fat targets from your calories.
- Moon Phase — Today’s moon phase and illumination.
- Local News — Recent headlines mentioning your city.
- One-Rep Max — Estimate your 1RM from reps at a given weight.
- Prayer Times — Today’s five daily prayer times for your location, with the next prayer highlighted.
- Sleep Calculator — Best bedtimes or wake times based on sleep cycles.
- Steps to Distance — Convert step count to distance and calories.
- Sunrise & Sunset — Today’s sunrise, sunset, and total daylight for your location.
- Waist-Hip Ratio — Waist-to-hip ratio and health risk band.
- Water Intake — Recommended daily water from body weight and activity.
- Weather — Current conditions, feels-like, hi/lo, wind, and humidity for your location.
- Let Chance Decide — A fair random pick — yes, no, maybe. It does not read your question.
- APR to APY — Convert between APR and APY for a compounding rate.
- Break-Even — Units needed to cover fixed and variable costs.
- CAGR Calculator — Compound annual growth rate between two values.
- Card Payoff — Months to clear a credit card balance and interest paid.
- Compound Interest — Future value of savings with contributions.
- Currency Converter — Convert between currencies at live ECB reference rates.
- Discount — Final price and savings after a discount.
- Down Payment — Deposit amount and loan needed from a purchase price.
- Electricity Cost — Running cost of an appliance from wattage and usage.
- Emergency Fund — How much to set aside for months of expenses.
- Trip Fuel Cost — Fuel needed and cost for a trip.
- Inflation Calculator — How prices change in value over time with inflation.
- Loan / Mortgage — Monthly payment, total paid, and interest for a loan.
- Margin & Markup — Profit, margin %, and markup % from cost and price.
- Take-Home Pay — Estimate net pay after tax and deductions.
- Overtime Pay — Total pay including overtime hours at a higher rate.
- Percent of Total — What percentage one value is of a total.
- Percentage Change — Percent increase or decrease between two values.
- Reverse Percentage — Find the original value before a percentage change.
- ROI Calculator — Return on investment and gain from cost and final value.
- Rule of 72 — Estimate years to double your money at a given rate.
- Salary Converter — Convert pay between hourly, weekly, monthly, and yearly.
- Sales Tax / VAT — Tax amount and total from a price and rate.
- Savings Goal — Monthly saving needed to reach a target by a date.
- Savings Rate — What share of your income you are saving.
- Simple Interest — Interest and total from principal, rate, and time.
- Split the Bill — Divide a bill evenly across any number of people.
- Tip & Split — Tip amount, total, and per-person split for a bill.
- Unit Price — Compare products by price per unit to spot the better deal.
- Better English — Quick in-widget rewrite of a short snippet so it reads clearer and more natural. For full proofreading or tone rewrites of a document, ask in chat.
- Text ↔ Binary — Convert text to 8-bit binary and back.
- Count Occurrences — Count how many times a word or phrase appears.
- Find & Replace — Replace text or regex matches across a block of text.
- HTML Entities — Encode or decode HTML special characters.
- Initials Extractor — Get the initials from a full name.
- Palindrome Checker — Check whether a word or phrase reads the same both ways.
- Programmer Case — Convert to camelCase, snake_case, kebab-case, and more.
- Reading Time — Estimate how long text takes to read.
- Remove Duplicate Lines — Strip repeated lines from a list, optionally case-insensitive.
- Remove Line Breaks — Join multi-line text into one line.
- Reverse Text — Reverse a string by characters, words, or lines.
- ROT13 / ROT47 — Classic letter-rotation obfuscation (ROT13 and ROT47).
- Sort Lines — Sort lines alphabetically, numerically, or by length.
- Text Repeater — Repeat text N times with a chosen separator.
- Writing Tools — Quick in-widget fixes for a pasted snippet — improve, fix grammar, summarize, or translate. For document-length work, ask in chat.
- Translator — Quick in-widget translation of a short snippet. For translating a whole document or file, ask in chat.
- Unicode Inspector — Show the Unicode code point of each character.
- URL Decode — Decode a percent-encoded URL or query string.
- Whitespace Cleaner — Collapse spaces, trim lines, and drop blank rows.
- 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.