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Projectile Motion Calculator New
Aim a launch and watch the arc. Range, peak height and flight time, live. Physics Wave Speed Calculator New
Watch a wave travel and see how frequency and wavelength set its speed. Physics Frequency and Period Calculator New
Convert frequency to period online: tap a beat or drag the slider. Physics Pendulum Period Calculator New
Drag the bob and watch period, velocity and energy trade off live. Physics Heat Transfer Calculator New
Watch heat flow between two blocks until they reach equilibrium. Physics Ohm's Law Calculator New
Set voltage and resistance, watch current and power in a live circuit. Physics Simple Harmonic Motion Calculator New
Set mass, spring constant and amplitude, watch the oscillation live. Physics Ideal Gas Law Calculator New
Set temperature, volume and amount, watch pressure respond via PV = nRT. Physics Momentum and Collision Calculator New
Collide two carts and compare elastic against inelastic, live. Physics Inclined Plane Calculator New
Set angle, mass and friction, and see whether the block slides. Physics Doppler Effect Calculator New
Move a source and watch its wavefronts bunch up and stretch behind. Physics Interactive Unit Circle Calculator New
Interactive unit circle: drag the point and read sin, cos, and tan. Applied Math Quadratic Equation Solver New
Slide the coefficients and watch the roots move on a live parabola. Applied Math Probability Calculator New
Roll thousands of times and watch frequency converge on probability. Applied Math Nuclear Reactor Calculator New
Drag a control rod and watch a chain reaction respond in real time. Physics Newman Projection Calculator New
Rotate the bond and watch the strain energy curve draw itself. Chemistry Crystal Field Splitting Calculator New
Watch the electrons pick high spin or low spin for themselves. Chemistry Reaction Rate Calculator New
Set the barrier and the temperature, then watch the reaction run. Chemistry Electron Configuration Calculator New
Watch the electrons fill in the order they really go in. Chemistry Chemical Bond Calculator New
Watch a bond slide from covalent to ionic as you change the atoms. Chemistry Molecular Geometry Calculator New
Watch electron geometry and molecular shape come apart as you add lone pairs. Chemistry Age Calculator New
Your exact age in years, months and days, plus a birthday countdown. Date & Time Aspect Ratio Calculator
Lock a ratio like 16:9 and solve the missing width or height. Design & CSS Base64 Encoder & Decoder New
Encode and decode Base64 in your browser. Developer Utilities Binary Converter New
Decimal to binary and back, with hex and octal alongside. Number Utilities Binary Text Converter
Convert text to binary and binary back to text. Developer Utilities BMI Calculator New
Your BMI from height and weight, with the healthy range for you. Health & Fitness BMR Calculator New
Your basal metabolic rate, and what each activity level adds. Health & Fitness Body Fat Calculator New
Body fat percentage by the Navy tape method, plus fat and lean mass. Health & Fitness Body Weight Tracker New
Log your weight daily and watch the smoothed trend line. Health & Fitness Book Tracker New
A private shelf for books you want, are reading, or finished. Productivity Breathing Circle New
Breathe with a named pattern, not a vague calm. Fidgets CAGR Calculator New
Compound annual growth rate, total growth and doubling time. Money & Finance Calorie Deficit Calculator New
What to eat daily for a chosen rate of loss, and how long it takes. Health & Fitness camelCase Converter
camelCase for variable names. Runs on your device. Text Utilities Character Counter New
Count characters, with and without spaces. Text Utilities Character Map New
Search special characters by name and tap to copy any of them. Text Utilities Chat Export Cleaner New
Clean a copied chat into plain text. Prep for a model CIDR Calculator New
Paste a CIDR. Get the network, range and wildcard. Developer Utilities Coin Flipper New
Flip a coin once, or five hundred times, and see the split. Generators WCAG Color Contrast Checker
Check text and background against WCAG AA and AAA contrast. Design & CSS Color Format Converter
HEX, RGB, HSL, HSV, OKLCH and CMYK, on your device. Design & CSS Combinations & Permutations Calculator New
nCr and nPr with the formula expanded step by step. Applied Math Compound Interest Calculator New
Watch savings grow, with optional monthly contributions. Money & Finance Context Fit Checker New
An estimate of context use. Not a tokenizer. Prep for a model CRC32 Hash Generator
A CRC32 checksum for error detection, not for security. Developer Utilities Cron Expression Parser New
Read a cron expression in plain English, with its next run times. Date & Time CSV Cleaner New
Fix empty rows, stray whitespace and ragged rows in one pass. Developer Utilities CSV Diff New
Compare two CSVs and see which rows changed, with column detail. Developer Utilities CSV to JSON Converter New
Turn CSV into a JSON array of objects, with type detection. Developer Utilities CSV to TSV Converter New
Convert comma-separated values to tab-separated, quoting handled. Developer Utilities Date Difference Calculator New
Exact time between two dates, including weekdays only. Date & Time Dice Roller New
Roll any dice by notation, and see how likely the result was. Generators Discount Calculator New
Sale price and how much you save, by percentage or amount. Number Utilities Emergency Fund Calculator New
How much emergency savings you need, and how far along you are. Money & Finance Encoding Detector New
Find out what a string is encoded with, and what it decodes to. Developer Utilities Music Equalizer Settings New
Find your sound, then copy the numbers into your own player. Music & Audio Find and Replace New
Search and replace text, with regex and a live match count. Text Utilities Fraction Calculator New
Add, subtract, multiply or divide fractions with every step shown. Applied Math Gears New
Spin the pair. The ratio stays honest. Fidgets Habit Streak Tracker New
Check habits, keep honest streaks, start again without guilt. Productivity Hash Identifier New
Identify a digest and verify the checksum. Developer Utilities Heart Rate Zone Calculator New
Your max heart rate and five training zones, from your age. Health & Fitness Hex Encoder and Decoder New
Encode text to hex and decode hex back to text. Developer Utilities HTML Entity Encoder & Decoder New
Encode and decode HTML entities in your browser. Developer Utilities Ideal Weight Calculator New
Ideal body weight by four formulas, plus the BMI healthy range. Health & Fitness Inflation Calculator New
What your money will be worth later, and what it will cost. Money & Finance Invisible Character Detector New
Find the character you cannot see that is breaking your text. Text Utilities JSON Diff New
See added, removed, and changed JSON paths. Developer Utilities JSON Escape / Unescape New
Escape text for a JSON string, or unescape one back to plain text. Developer Utilities JSON Formatter New
Pretty-print JSON with proper indentation. Developer Utilities JSON Minifier New
Strip whitespace from JSON to make it smaller. Developer Utilities JSON Schema Validator New
Checks the keywords this page lists. Prep for a model JSON to CSV Converter New
Turn JSON arrays into CSV, nested objects handled. Developer Utilities JSON to JSON Schema New
Types from this example. Not a required-field list. Prep for a model JSON to YAML Converter New
Turn JSON into YAML for Kubernetes, Compose and CI configs. Developer Utilities JSON Tree Viewer New
Explore JSON as a collapsible tree, and copy any path or value. Developer Utilities JSON Validator New
Check JSON syntax and see exactly where it breaks. Developer Utilities JWT Decoder New
Read a JSON Web Token header, payload and claims. Never uploaded. Developer Utilities kebab-case Converter
Convert text to kebab-case for slugs, classes and IDs. Text Utilities Keep Screen Awake New
Keep the display on in your browser while this tab stays open. Productivity Kinetic Sand New
Drag or tilt the pile. Reset when it packs. Fidgets Letter Counter New
Count only letters, ignoring digits, spaces and punctuation. Text Utilities Line Counter New
Count total lines, non-empty lines and paragraphs. Text Utilities llms.txt Generator New
A short site description. Empty sections left out. Prep for a model Lorem Ipsum Generator New
Placeholder text by paragraph, sentence or word. Generators Lowercase Converter
Convert any text to lowercase, then copy it. Text Utilities Macro Calculator New
Split a calorie target into protein, carbs and fat. Health & Fitness Margin Calculator New
Gross margin, gross profit and markup from cost and price. Number Utilities Markup Calculator
Markup percentage from cost and price, or price from a markup. Number Utilities MD5 Hash Generator New
Generate an MD5 hash from any text. Developer Utilities Move Today Tracker New
Tap once a day to log that you moved, and build a streak. Health & Fitness Normalize Whitespace
Collapse every run of whitespace into single spaces. Text Utilities Notepad New
Quick notes that save themselves, right in your browser. Productivity Number to Words New
Spell a number out in English words, or read the words back. Number Utilities One Rep Max Calculator New
Your one rep max from a set you lifted, across four formulas. Health & Fitness Paragraph Counter New
Count paragraphs split by blank lines. On your device. Text Utilities Password Generator New
Strong random passwords, with a live strength estimate. Generators Percentage Calculator
Percent of a number, or the change between two. On your device. Number Utilities Pomodoro Timer New
Stay focused with timed work sessions and breaks. Productivity Pop It New
Tap the bubbles. Infinite mode when you want more. Fidgets Prime Factorization Calculator New
Factor a number into primes, with the divisions narrated. Applied Math Prompt Packer New
Assembles a prompt from fields. Does not write it. Prep for a model Protein Intake Calculator New
The protein range your weight and training goal support. Health & Fitness Punycode Converter
Convert domain names between Unicode and Punycode form. Developer Utilities PX to DP Converter
Convert px to dp and sp across Android buckets and iOS points. Design & CSS PX to REM Converter
px to rem, em and pt, against your root font size. Design & CSS QR Code Generator New
QR codes for a URL, Wi-Fi, contact or plain text. PNG or SVG. Generators Random Choice Picker New
Paste the options, let it choose, or shuffle them into an order. Generators Random Name Picker New
Draw names from a pasted list, with no accidental repeats. Generators Random String Generator New
Random strings and tokens with a custom alphabet. Generators Reading Time Calculator New
Minutes to read or speak a text. Nothing is uploaded. Text Utilities Regex Tester New
Live regex matcher with capture groups. A regexp tester that stays offline. Developer Utilities Remove Accents
Strip diacritics to plain ASCII. Nothing is uploaded. Text Utilities Remove Blank Lines
Delete empty and whitespace-only lines from text. Text Utilities Remove Duplicate Lines
Remove repeated lines, keeping the first of each. Text Utilities Remove Emoji New
Strip every emoji, leaving words and spacing intact. Text Utilities Remove Extra Spaces
Collapse extra spaces and tabs. Nothing is uploaded. Text Utilities Remove Line Breaks
Join wrapped lines back into one paragraph. Text Utilities Remove Tabs
Replace tab characters with spaces, then copy. Text Utilities Reverse Text
Reverse a string character by character. On your device. Text Utilities ROI Calculator New
Return on investment, including the annualized return. Money & Finance Roman Numeral Converter New
Numbers to Roman numerals and back, from I to MMMCMXCIX. Number Utilities ROT13 Encoder / Decoder New
ROT13 text. One pass does both directions. Developer Utilities Rule of 72 Calculator New
How long money takes to double at a given rate of return. Money & Finance Running Pace Calculator New
Pace per km and per mile, plus predicted race times. Health & Fitness Savings Goal Calculator New
How much to save each month to hit a goal by a target date. Money & Finance Scientific Calculator New
Trigonometry, logarithms, powers and roots, with a visible history. Number Utilities Sentence Case Converter
Capitalize the first letter of each sentence. Text Utilities Sentence Counter New
Count sentences by their ending punctuation. Text Utilities SHA-1 Hash Generator New
Generate a SHA-1 hash from any text. Developer Utilities SHA-256 Hash Generator New
Generate a SHA-256 hash from any text. Developer Utilities SHA-512 Hash Generator New
Generate a SHA-512 hash from any text. Developer Utilities Shell Quote Escalator New
Escape a command for every shell between you and the far end. Developer Utilities Shop UPI Tally New
A local monthly tally of your shop UPI receipts. Money & Finance SIP Calculator New
Future value of a monthly SIP, and what returns add on top. Money & Finance Slime New
Poke and pull. Release if it sticks. Fidgets Slugify Text
A clean, lowercase, hyphenated URL slug. On your device. Text Utilities snake_case Converter
Convert text to snake_case for variables and columns. Text Utilities Space Counter New
Count space characters, and characters without them. Text Utilities Fidget Spinner New
Flick it. It spins, then it stops. Fidgets Split Bill New
Split a dinner bill so every share adds up. Money & Finance Statistics Visualizer New
Paste numbers. See mean, spread, histogram, and box plot. Applied Math Switch Board New
Flip the switches. All off when you want a clean board. Fidgets Cron to systemd Timer Converter New
Translate a crontab line, then check it fires when cron did. Date & Time Tax Calculator
Add sales tax or VAT, or work backwards from the total. Number Utilities TDEE Calculator New
Your daily energy expenditure, and calories to lose or gain. Health & Fitness Text Compare New
Compare two texts and see exactly which lines changed. Text Utilities Text Repeater New
Repeat text as many times as you need, separated how you like. Text Utilities Timezone Converter New
Convert a time between zones, daylight saving handled. Date & Time Tip Calculator New
The tip, the total, and the split between any number of people. Number Utilities Title Case Converter
Capitalize the first letter of each word. On your device. Text Utilities Todo List New
Tasks and subtasks tracked privately in your browser. Productivity Trim Text
Trim the whitespace at each end of every line. Text Utilities Unix Timestamp Converter New
Unix timestamp to a date and back, in seconds or milliseconds. Date & Time UPI 1999 Split New
A meme split into 1999 rupee chunks. Not advice. Money & Finance UPI MDR Estimator New
Estimate merchant MDR in rupees. Not a tax you owe. Money & Finance Uppercase Converter
Convert any text to UPPERCASE, then copy it. Text Utilities URL Encoder & Decoder New
Percent-encode and decode URL components. Developer Utilities UUID Generator New
Random version 4 UUIDs, one or many at a time. Generators UUID Inspector New
Read the version, variant, and time inside a UUID. Generators Water Intake Tracker New
Tap to log glasses of water and build a hydration streak. Health & Fitness What Is My IP New
See the public IPv4 and IPv6 this connection presents. Developer Utilities Word Counter New
Count words as you type, and set a goal to write to. Text Utilities Word Frequency Counter New
How many times each word appears, with percentages. Text Utilities YAML to JSON Converter New
Turn YAML into JSON, anchors and multi-line strings handled. Developer Utilities No matching tools found. Suggest it →