ToolWren🔤Base64
Encode text to Base64 or decode Base64 to text instantly in your browser. UTF-8 safe, private, no upload.
3️⃣Base32
Encode text to Base32 or decode a Base32 string back to text (RFC 4648). UTF-8 safe, private, runs in your browser.
🔗URL
Percent-encode text for safe use in URLs, or decode an encoded URL component. Runs entirely in your browser.
🔢Hex
Convert text to hexadecimal bytes or hex back to text. UTF-8 aware, runs entirely in your browser.
💾Binary
Convert text to 8-bit binary or binary back to text. UTF-8 aware. Runs entirely in your browser, no upload.
📄HTML Entities
Escape HTML special characters or unescape entities back to text. Prevent XSS and display code safely. Runs in your browser.
🌐Unicode
Convert text to \uXXXX Unicode escape sequences used in JSON and source code, or decode them back. Runs in your browser.
🔡Backslash Escape
Escape or unescape backslash sequences (\n, \t, quotes) in strings. Free online escape tool.
📐Byte Counter
Count how many bytes a string uses in UTF-8, plus characters and UTF-16 units. Free online byte counter.
🔠ASCII Table
Look up ASCII codes — convert characters to decimal/hex codes and back, with a full printable table. Free online.
🔑JWT
Decode a JSON Web Token to inspect its header and payload, with an automatic expiry check. Private — nothing is uploaded.
🔏JWT Generator
Create and sign a JSON Web Token (HS256/384/512) in your browser using the Web Crypto API. Private, nothing uploaded.
🛰️CoAP
Decode a CoAP binary message from hex: header, type, code, message ID, token, options and payload. RFC 7252, runs in your browser.
📦CBOR
Decode a CBOR binary payload from hex into readable JSON. Ideal for IoT, COSE and CoAP debugging. Runs in your browser.
⏱️Timestamp
Convert Unix epoch timestamps to human-readable dates and dates back to epoch. Auto-detects seconds vs milliseconds. Runs in your browser.
{ }JSON
Beautify, validate and minify JSON in your browser. Pretty-print with indentation or compress to one line. Private, no upload.
🗂️CSV ⇄ JSON
Convert a CSV table to a JSON array of objects, or JSON back to CSV. Handles quoted fields. Runs entirely in your browser.
🧾YAML ⇄ JSON
Convert YAML to JSON or JSON to YAML in your browser. Supports maps, lists and scalars. Private, no upload.
🌀cURL Converter
Convert a cURL command into ready-to-run Python (requests), JavaScript (fetch) or Node.js code. Runs in your browser.
#️⃣Hash
Generate MD5, SHA-1, SHA-256 and SHA-512 hashes of any text instantly in your browser. Private, no upload.
🆔UUID
Generate random UUID v4 and ULID identifiers in bulk with one-click copy. Cryptographically random, runs in your browser.
⏲️Cron
Translate a cron expression into plain English and preview the next scheduled run times. Free, runs in your browser.
🗄️SQL Formatter
Beautify and indent SQL queries with keywords on new lines for readability. Runs entirely in your browser.
📰Markdown
Convert Markdown to HTML — headings, bold, italic, links, lists and code. Free online Markdown converter.
🧼Strip HTML
Remove all HTML tags from text, leaving just the readable content. Free online HTML stripper.
💳Luhn Check
Check whether a number passes the Luhn checksum used by credit cards and IMEIs. Free online Luhn validator.
🧰JSON ⇄ TOML
Convert JSON to TOML or TOML to JSON in your browser. Handles nested tables and arrays of tables — ideal for Shopify app config, Cargo and pyproject.toml. Private, no upload.
📏Length
Convert length and distance between meters, kilometers, miles, feet, inches, yards and nautical miles. Free, runs in your browser.
⚖️Weight
Convert weight and mass between kilograms, grams, pounds, ounces, stones and tonnes. Free and accurate.
🌡️Temperature
Convert temperature between Celsius, Fahrenheit and Kelvin instantly. Free online temperature converter.
🧪Volume
Convert volume between liters, milliliters, US/UK gallons, cups, pints, quarts and fluid ounces. Free, in your browser.
🗺️Area
Convert area between square meters, square feet, acres, hectares and square miles. Free online area converter.
🏎️Speed
Convert speed between km/h, mph, meters per second, knots and feet per second. Free online speed converter.
💽Data Size
Convert digital storage between bytes, KB, MB, GB, TB and binary KiB/MiB/GiB. Free online data size converter.
📶Data Rate
Convert data transfer rates between bps, kbps, Mbps, Gbps and MB/s. Understand internet speeds and download rates.
🎈Pressure
Convert pressure between pascals, kPa, bar, psi, atmospheres and mmHg. Free online pressure converter.
⚡Energy
Convert energy between joules, calories, kilocalories, watt-hours, kWh and BTU. Free online energy converter.
🔌Power
Convert power between watts, kilowatts, megawatts, horsepower and BTU per hour. Free online power converter.
📐Angle
Convert angles between degrees, radians, gradians, turns, arcminutes and arcseconds. Free online angle converter.
〰️Frequency
Convert frequency between hertz, kilohertz, megahertz, gigahertz and RPM. Free online frequency converter.
⛽Fuel Economy
Convert fuel economy between US MPG, UK MPG, kilometers per liter and liters per 100km. Free online converter.
👟Shoe Size
Convert shoe sizes between US, UK and EU systems (approximate men's sizing). Free online shoe size converter.
🔢Number Base
Convert numbers between binary, octal, decimal and hexadecimal instantly. Free online base converter for programmers.
🏛️Roman Numerals
Convert between Arabic numbers and Roman numerals (1-3999). Free online Roman numeral converter.
🍳Cooking
Convert cooking measurements between cups, tablespoons, teaspoons, milliliters and fluid ounces. Free online cooking converter.
⌛Time Units
Convert time units between seconds, minutes, hours, days, weeks, months and years. Free online time converter.
📖Reading Time
Estimate reading and speaking time from a word count at average speeds. Free online reading time calculator.
🎨Color
Convert colors between HEX, RGB and HSL with a live swatch. Edit any field and the others update. Runs in your browser.
🖼️Palette
Extract the dominant color palette from any image as HEX codes. Processed locally in your browser — no upload.
🌗Contrast
Check the WCAG contrast ratio between text and background colors, with AA and AAA pass/fail grades. Free online contrast checker.
🎚️Gradient
Build a CSS linear or radial gradient between two colors and copy the ready-to-use code. Free online gradient generator.
🎛️Shades & Tints
Generate shades, tints and tones from any base color, each with a copyable HEX code. Free online color shade generator.
👁️Color Blindness
Preview how a color looks to people with the common types of color vision deficiency. Free online color blindness simulator.
📝Lorem Ipsum
Generate Lorem Ipsum placeholder text by paragraphs, sentences or words for mockups and designs. Free, in your browser.
🔳QR Code
Generate a QR code for any text, URL or Wi-Fi network in your browser and download it as PNG or SVG. Private, no upload.
🔐Password
Generate strong, random passwords with custom length and character sets. Cryptographically secure, runs in your browser.
🔑Passphrase
Generate memorable Diceware-style word passphrases that are strong yet easy to remember. Runs in your browser.
🎲Random Number
Generate random integers within a range, with an option for unique values. Free online random number generator.
🎲Dice
Roll virtual dice using standard notation like 2d6+3 or d20. Free online dice roller for tabletop games.
🪙Coin Flip
Flip a virtual coin once or many times and see the tally of heads and tails. Free online coin flipper.
🎯Random Picker
Shuffle a list or pick random items from it — for raffles, teams and decisions. Free online random picker.
🌈Random Color
Generate random colors as HEX codes for design inspiration and palettes. Free online random color generator.
📐Aspect Ratio
Keep an aspect ratio when resizing: enter the original size and one new dimension to get the other. Free, in your browser.
%Percentage
Calculate X% of Y, what percent X is of Y, and percentage increase or decrease between two numbers. Free online.
🎓GPA
Calculate your GPA from course grades and credit hours on the 4.0 scale. Add as many courses as you need. Free online.
🕐Hours
Calculate hours and minutes worked between a start and end time, minus breaks. Free online time card calculator.
➗Fraction
Convert a fraction to a decimal and percentage instantly. Free online fraction to decimal calculator.
🧮Ratio
Solve a proportion A:B = C:D for the missing value. Free online ratio and proportion calculator.
🏦Loan
Calculate monthly loan or mortgage payments, total interest and total cost from amount, rate and term. Free online.
🍽️Tip
Calculate the tip and split the bill between any number of people. Free online tip calculator.
🏷️Discount
Calculate the sale price and how much you save from an original price and discount percentage. Free online.
🧾VAT
Add or remove VAT or sales tax from a price at any rate. See net, tax and gross amounts. Free online.
📈Compound Interest
Project investment growth with compound interest and optional monthly contributions. Free online compound interest calculator.
💵Simple Interest
Calculate simple interest and the final amount from principal, rate and time. Free online simple interest calculator.
💼Salary
Convert a salary between hourly, daily, weekly, monthly and annual figures. Free online salary converter.
🚗Fuel Cost
Estimate the fuel cost of a trip from distance, efficiency and fuel price. Free online fuel cost calculator.
⚖️BMI
Calculate your Body Mass Index (BMI) in metric or imperial units and see the standard weight category. Free online.
🔥BMR
Estimate your Basal Metabolic Rate (BMR) and daily calorie needs with the Mifflin-St Jeor equation. Free online.
📊Body Fat
Estimate body fat percentage using the U.S. Navy circumference method. Free online body fat calculator.
🏃Pace
Calculate running pace per km and per mile, plus speed, from distance and time. Free online pace calculator.
😴Sleep
Find the best bedtimes or wake-up times based on 90-minute sleep cycles. Adjustable cycle length and fall-asleep time. Free sleep cycle calculator.
💧Water Intake
Estimate your recommended daily water intake from body weight and activity. Metric and imperial. Free online water calculator.
🔥Calories Burned
Estimate calories burned during exercise from the activity's MET value, your weight and duration. Free online calorie burn calculator.
🎂Age
Calculate exact age in years, months and days from a birth date, plus total days and a next-birthday countdown.
📅Business Days
Count working days between two dates, excluding weekends and US federal or UK bank holidays. Free, in your browser.
💬Discord Timestamp
Generate Discord timestamp tags from any date with a live preview of every format (relative, short, long). Free online.
📆Date Add
Add or subtract days, weeks, months or years from a date. Free online date calculator.
🗓️Date Difference
Count the days, weeks, months and years between two dates. Free online date difference calculator.
⏳Countdown
See a live countdown to any future date and time, in days, hours, minutes and seconds. Free online.
⚙️Regex Tester
Test a regular expression against sample text with live matches, flags and capture groups. Runs in your browser.
✍️Word Counter
Count words, characters, sentences and paragraphs with reading-time estimate, live as you type. Private, in your browser.
🔠Case Converter
Convert text between UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE.
🔗Slug
Turn any title or sentence into a clean, URL-safe slug. Handles accents and lets you choose the separator.
🔍Text Diff
Compare two blocks of text line by line and highlight what was added, removed or changed. Runs in your browser.
🔄Reverse Text
Reverse text character by character instantly. Free online text reverser.
🧹Dedupe Lines
Remove duplicate lines from a list, keeping the first occurrence. Free online duplicate line remover.
🔤Sort Lines
Sort lines alphabetically (A-Z or Z-A), numerically, or reverse them, with dedupe. Free online line sorter.
📃Line Counter
Count the number of lines, non-empty lines and characters in text. Free online line counter.
✂️Whitespace
Trim each line and collapse repeated spaces and blank lines. Free online whitespace cleaner.
📻NATO Phonetic
Convert text to the NATO phonetic alphabet (Alpha, Bravo, Charlie). Free online NATO phonetic converter.
🙃Upside Down
Flip text upside down using special Unicode characters. Free online upside down text generator.
💬Leetspeak
Convert text to leetspeak (l33t), replacing letters with numbers and symbols. Free online leet converter.
📊Char Frequency
Count how often each character appears in text, sorted by frequency. Free online frequency counter.
🔁ROT13
Apply the ROT13 letter-rotation cipher online. Symmetric — the same action encodes and decodes. Runs in your browser.
📡Morse
Translate text to Morse code or decode Morse back to text. Supports letters, digits and punctuation. Runs in your browser.
🏺Caesar Cipher
Encrypt or decrypt text with a Caesar shift cipher (any shift 0-25). Free online Caesar cipher tool.
🔃Atbash
Apply the Atbash cipher, mapping A to Z, B to Y and so on. Its own inverse. Free online Atbash tool.
🗝️Vigenère
Encrypt or decrypt text with the Vigenère keyword cipher. Free online Vigenère cipher tool.