All tools

Every tool, alphabetical.

Calculators

Calculate your exact age in years, months, days and seconds.

Calculate your Body Mass Index in metric or imperial units.

Compound Interest Calculator

Project savings growth with compound interest and monthly contributions.

Date Calculator

Days between dates, add or subtract days, business-day count.

Discount Calculator

Compute sale price, savings and effective discount.

Compute your GPA on the US 4.0 scale, weighted by credits.

Hourly to Salary Calculator

Convert between hourly wage, weekly, monthly and annual salary - configurable hours/week.

Income Tax Estimator (US Federal)

Estimate your US federal income tax with progressive brackets.

Loan & Mortgage Calculator

Estimate monthly payments, total interest and amortization.

Microwave Time Converter

Recipe written for an 800 W microwave but yours is 700 W? Get the right cooking time in one tap.

Mortgage vs Rent Calculator

Find your buy-vs-rent break-even point in months.

Pace Calculator

Running pace, distance and time - any two, get the third. Splits in km and miles.

Percentage Calculator

Five percent modes in one tool: X% of Y, percent change, reverse percentage, plus add or subtract a percent.

Scale a recipe up or down by servings or a multiplier.

Rule of Three Calculator

Solve a proportion: if A is to B, then C is to ? - leave any box empty and we'll fill it in.

Salary After Tax Calculator

Net annual and monthly take-home pay across 5 countries.

TDEE Calculator

Daily calorie needs using Mifflin-St Jeor BMR and activity multiplier.

Time Duration Calculator

How many hours, minutes or seconds between two times - or two full datetimes - in your browser.

Calculate the tip and split the bill between any number of people.

Converters

Crypto Converter

Convert between Bitcoin, Ethereum, 18 other major cryptocurrencies and 10 fiat currencies - in your browser.

Currency Converter

Convert between 46 currencies at mid-market rates, see a multi-currency table at a glance, and check your bank's spread.

Morse Code Translator

Encode and decode Morse code with audio playback - in your browser, no upload.

Number Base Converter

Convert numbers between binary, octal, decimal and hexadecimal.

Oven Temperature Converter

Convert between Celsius, Fahrenheit and UK gas marks.

Roman Numeral Converter

Convert decimal numbers to Roman numerals and back.

Timezone Converter

Convert a time between any two IANA timezones.

Convert length, weight, temperature, volume and more.

Unix Timestamp Converter

Convert between Unix epoch (seconds or milliseconds) and human-readable date / time, in UTC and local.

Text & writing

Convert text to UPPER, lower, Title, camelCase, snake_case, kebab-case.

Character Counter

Count characters with and without spaces, in real time.

Find and Replace

Find and replace text with optional regex, case-sensitivity, and live match count - in your browser.

Remove Duplicate Lines

Paste any list and we'll strip out the duplicates - case-sensitive or not, order preserved or sorted.

Turn any title into a clean, URL-safe slug.

Sort any list of lines A-Z, Z-A, by length, or randomise - case-aware, in your browser.

Compare two texts line by line, with added / removed counts.

Count words, characters, sentences and reading time.

Word Frequency Counter

Count how often each word appears, with stop-word filter.

Design

Border-Radius Generator

Asymmetric border-radius with all 8 corner values, live preview and shape presets (pill, blob, leaf, ticket).

Color Converter (HEX, RGB, HSL)

Convert colors between HEX, RGB, HSL and OKLCH.

Color Palette Generator

Generate complementary, analogous, triadic, tetradic and monochromatic palettes from any base colour.

Color Shade Generator

Generate 10 shades and 10 tints of any colour - ready as a hex list or CSS variables.

Contrast Checker

WCAG colour-contrast checker with live ratio, AA/AAA pass-fail badges and sample text.

CSS Box-Shadow Generator

Layer multiple CSS box-shadows with live preview, presets and a copy-ready declaration.

CSS Clip-Path Generator

Build polygon clip-paths visually - triangle, hexagon, star, message bubble and more - with a live preview and copy-ready CSS.

CSS Filter Generator

Live CSS filter playground with sliders for blur, brightness, contrast, saturate, sepia, grayscale, invert, hue-rotate and opacity.

CSS Gradient Generator

Build linear and radial CSS gradients with a live preview.

Cubic-Bezier Generator

Visual cubic-bezier editor with animated preview and 12 industry-standard easing presets.

Favicon Generator

Drop a square image, download PNG favicons in every standard size.

Glassmorphism Generator

Frosted-glass CSS with live preview - tune background colour, backdrop blur, border and shadow over a busy backdrop.

Developer

Base64 Encoder / Decoder

Encode and decode Base64 strings (text and files).

Cron Expression Reader

Decode a cron expression into plain English plus the next 5 run times.

CSV to JSON Converter

Convert CSV to JSON and back, with custom delimiter.

Hash Generator (SHA-1, SHA-256, SHA-384, SHA-512)

Compute cryptographic hashes of text in your browser.

HTML Entity Encoder / Decoder

Encode and decode HTML entities, named and numeric.

Strip whitespace, comments and quotes from HTML - in your browser, with a before/after size report.

JSON Formatter & Validator

Format, minify and validate JSON instantly.

Decode and inspect JSON Web Tokens locally.

Markdown Table Generator

Build a Markdown table from rows and columns with column alignment - or paste CSV / TSV and get the table back.

Markdown to HTML Converter

Convert Markdown to HTML and back, with a live preview.

Mock Data Generator

Generate fake user records - name, email, phone, address - as JSON or CSV. No signup, no API call.

Test and debug regular expressions with live highlights.

Pretty-print SQL with consistent keyword casing and line breaks.

URL Encoder / Decoder

Percent-encode and decode URLs and query strings.

Pretty-print or minify XML with proper indentation - in your browser, no upload.

YAML to JSON Converter

Convert YAML to JSON and back, in your browser.

Generators

Roll N dice with M sides (d4 / d6 / d20 / custom) - cryptographically random, in your browser.

List Randomizer

Shuffle a list, pick N random items, or draw a single winner - using your browser's CSPRNG.

Lorem Ipsum Generator

Generate placeholder text by paragraphs, sentences or words.

Password Generator

Generate strong, random passwords using your browser's CSPRNG.

QR Code Generator

Create QR codes for URLs, Wi-Fi, contacts and plain text.

Random Number Generator

Cryptographically secure random integers, with range, count and uniqueness.

Username Generator

Generate random usernames - adjective + noun + number, or pick a theme. All client-side.

Generate v4 (random) and v7 (time-sorted) UUIDs in bulk.