Free online tools,
fast and private.
Calculators, converters and generators that work right in your browser. Nothing to install, no account, and your files never leave your device.
Pick a tool and get the answer
Every tool gives the result as you type, with the steps shown where it helps.
Instagram Fonts
Type your text and get it back in 12 stylish Unicode fonts — bold, italic, script…
Barcode Generator
Create Code 128, EAN-13 and UPC-A barcodes in seconds. The check digit is calculated for…
GPA Calculator
Calculate your GPA on the 4.0 scale from letter grades and credits. Supports weighted GPA…
Invoice Generator
Make a clean, professional invoice in minutes. Add your items, tax and discount, then…
Compound Interest Calculator
See how your savings grow with compound interest. Add a starting amount and monthly…
LCM & GCF Calculator
Find the least common multiple and the greatest common factor of up to 10 numbers, with…
Slope Calculator
Enter two points to get the slope, the equation of the line, both intercepts, the angle…
Morse Code Translator
Translate text to Morse code and back, then listen to it. Supports letters, numbers…
WebP to JPG Converter
Convert WebP images to JPG or PNG — or JPG and PNG to WebP — in seconds. Batch conversion…
Emoji Copy and Paste
Click any emoji to copy it. Search more than 1,400 emojis by name, browse by category and…
Image Resizer
Resize JPG, PNG and WebP images to an exact size in pixels or by percentage. Batch resize…
Fuel Cost Calculator
Work out how much fuel a trip will use and what it will cost. Works with miles or…
Electricity Cost Calculator
Find out how much your appliances cost to run. Add devices with their watts and daily…
JSON Formatter
Paste JSON to format it with clean indentation, check that it is valid, minify it or sort…
Password Generator
Create strong, random passwords in one click. Choose the length and character types, skip…
Regex Tester
Type a regular expression and some text to see every match highlighted, with capture…
UUID Generator
Generate random UUID v4 or time-ordered UUID v7 identifiers — one or up to 500 at a time…
Base64 Encode / Decode
Encode text to Base64 or decode Base64 back to text — with emoji and accents handled…
Unix Timestamp Converter
See the current Unix timestamp, convert any timestamp to a readable date in UTC and your…
Loan Calculator
Work out the monthly payment of any loan, the total interest you will pay and a…
Profit Margin Calculator
Enter cost and selling price to get the profit, profit margin and markup — or enter a…
Break-Even Calculator
Find out how many units you need to sell to cover all your costs, the revenue at that…
Credit Card Payoff Calculator
Find out when your card will be paid off with your monthly payment and how much interest…
Hourly to Salary Calculator
Turn an hourly wage into an annual salary — or a salary into an hourly rate — and see the…
Markup Calculator
Add a markup to your cost to get the selling price, or find the markup from a cost and…
APY Calculator
Convert a nominal interest rate (APR) into the annual percentage yield (APY) for any…
Image Compressor
Make photos and screenshots smaller without visible quality loss. Drop up to 30 images…
JPG to PNG Converter
Turn JPG or JPEG photos into PNG files at full resolution. Convert several images at once…
Username Generator
Find a username for Instagram, TikTok, gaming, Discord or a new account. Pick a style…
Business Name Generator
Type what your business does and get 30 name ideas in different styles — from modern…
Standard Deviation Calculator
Paste a list of numbers to get the standard deviation, variance, mean, median, mode…
Aspect Ratio Calculator
Enter a width and height to see the simplified aspect ratio, or type a new width or…
HEX to RGB Converter
Paste a HEX, RGB or HSL colour — or pick one — and get every format at once, with a live…
Cooking Measurement Converter
Convert any recipe between cups, spoons, millilitres, grams, ounces and pounds. Pick the…
Area Converter
Convert land, room and floor areas between metric and imperial units. Type a value, pick…
ROI Calculator
Work out how much an investment earned in percent, how many times your money grew and…
Stock Profit Calculator
Find out how much you made or lost on a share trade, after commissions, plus the return…
Mortgage Calculator
Estimate the real monthly cost of buying a home: principal and interest, plus property…
Scientific Notation Converter
Turn any number into scientific notation, E notation or engineering notation — or turn…
Square Root Calculator
Find the square root, cube root or a higher root of any number, check whether it is a…
Prime Number Checker
Type any whole number to see at once whether it is prime. If it is not, you get its prime…
Quadratic Equation Solver
Enter a, b and c to solve ax² + bx + c = 0. You get the roots — real or complex — the…
Significant Figures Calculator
Find out how many significant figures a number has and round it to any number of sig…
Probability Calculator
Combine the probabilities of two independent events, or find the chance of at least one…
URL Encode / Decode
Convert text into a safe URL format with percent encoding, decode encoded links back into…
Hash Generator
Create MD5, SHA-1, SHA-256, SHA-384 and SHA-512 hashes of any text or file, and check a…
Weight Converter
Convert any weight or mass between metric and imperial units — kilograms, grams, pounds…
Volume Converter
Convert liquid and solid volumes between metric units and US or UK imperial units —…
Data Storage Converter
Convert file and storage sizes between bits, bytes, kilobytes, megabytes, gigabytes and…
Fuel Economy Converter
Compare car fuel consumption from different countries by converting between miles per…
Recipe Scaler
Paste a recipe’s ingredient list, enter the original and new number of servings, and get…
Lorem Ipsum Generator
Create filler text for layouts, mockups and templates. Choose paragraphs, sentences or…
JWT Decoder
Paste a JSON Web Token to see its header and payload as formatted JSON, check its issue…
JSON to CSV Converter
Turn JSON data from an API or export into a CSV file you can open in Excel or Google…
SQL Formatter
Paste a one-line or messy SQL query and get it back neatly formatted — clauses on their…
Markdown to HTML Converter
Write or paste Markdown and see it rendered instantly, then copy the clean HTML for your…
PNG to JPG Converter
Turn PNG screenshots, graphics and photos into smaller JPG files. Convert many at once…
QR Code Generator
Make a QR code for a website, Wi-Fi network, email, phone number, SMS or contact card…
SVG to PNG Converter
Turn an SVG file or pasted SVG code into a crisp PNG image. Choose a scale or an exact…
Favicon Generator
Create every favicon size a modern website needs from one image or a few letters, plus…
Crop Image
Cut away the parts of a photo you do not need. Drag the crop box, pick a ratio like 1:1…
Rotate Image
Turn sideways or upside-down photos the right way round, straighten a tilted horizon with…
Signature Generator
Draw your signature with a mouse, finger or stylus, or type your name in a handwriting…
Color Palette Generator
Build a harmonious set of five colours from one base colour or at random. Lock the ones…
Keyboard Tester
Find out whether every key on your keyboard works. Pressed keys light up on a virtual…
Gamepad Tester
Check an Xbox, PlayStation, Switch or generic controller in your browser. See every…
Screen Resolution
See your screen resolution, the real number of physical pixels, the device pixel ratio…
What Is My User Agent
See the user agent string your browser sends to every website and what it means: browser…
Scientific Calculator
A full scientific calculator in your browser: trigonometry in degrees or radians…
Length Converter
Convert between centimetres, inches, metres, feet, millimetres, kilometres, miles, yards…
Temperature Converter
Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine. The tool shows the…
Image to PDF Converter
Turn photos, scans and screenshots into a single PDF. Add many images, put them in the…
Distance Converter
Convert road, running and travel distances between kilometres and miles, plus metres…
Height Converter
Convert a height like 5′9″ to centimetres, or 175 cm to feet and inches. The result also…
Speed Converter
Convert speeds between kilometres per hour, miles per hour, metres per second, knots…
Color Picker from Image
Find the exact colour of any pixel in a photo, logo or screenshot. Click to pick HEX, RGB…
Simple Interest Calculator
Work out simple interest from the principal, rate and time. The calculator shows the…
Pressure Converter
Convert pressure units for tyres, weather, diving, compressors and engineering: psi, bar…
Exponent Calculator
Raise any number to any power, see huge results with every digit, and understand negative…
Meme Generator
Add classic top and bottom meme text to your own picture, a screenshot or a plain…
Dead Pixel Test
Fill your screen with solid colours to spot dead, stuck or hot pixels on a monitor…
Touch Screen Test
Check whether every part of a phone, tablet or touch-screen laptop responds. Draw over a…
Refresh Rate Test
Find out at how many hertz your screen is really running. The test measures the time…
Speaker Test
Check that your left and right speakers or headphones are connected correctly, and hear…
Savings Goal Calculator
Plan any savings goal — an emergency fund, a car, a trip or a deposit. Calculate how much…
Depreciation Calculator
Work out how much an asset loses in value each year. Compare straight-line, double…
CSV to JSON Converter
Turn CSV exports from Excel, Google Sheets or databases into clean JSON. The converter…
Image to Base64 Converter
Encode images as Base64 to embed them directly in HTML, CSS, JSON or emails — or paste…
Color Contrast Checker
Make sure your text is readable for everyone. Enter a text and background colour to get…
Add Watermark to Image
Protect your photos with a text or logo watermark. Add it to many images at once, pick a…
Color Blindness Simulator
Check whether your charts, maps, UI designs and photos still work for the roughly 1 in 12…
CSS Box Shadow Generator
Design soft, sharp, layered or inner shadows with sliders and a live preview, then copy…
Shoe Size Converter
Find your shoe size in another country’s system. Convert between US, UK and European…
PX to REM Converter
Turn pixel values into rem for responsive, accessible CSS — or rem back into pixels. Set…
Ring Size Converter
Find the right ring size anywhere in the world. Convert between US/Canada, UK/Australia…
CSS Gradient Generator
Build beautiful gradient backgrounds in seconds. Choose linear, radial or conic, pick up…
HTML Minifier
Make your HTML smaller and faster to load. Remove comments and unnecessary whitespace…
CSS Minifier & Beautifier
Shrink your stylesheets or make minified CSS readable again. The minifier removes…
Glassmorphism Generator
Design frosted-glass cards and panels with a live preview. Tune blur, transparency…
Border Radius Generator
Round the corners of any element visually. Control every corner in pixels or percent, use…
Text to Speech
Listen to articles, notes, emails or your own writing. Paste any text, choose a voice and…
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Private by design
Images and numbers are processed on your own device. Nothing is uploaded or stored on our servers.
Fast on any phone
Light pages, no pop-ups and no waiting. Results update while you type.
In your language
Every tool and guide is available in 5 languages, with local number and date formats.
Latest guides
QR Code Generator Free: Create QR Codes in Seconds
Use our free qr code generator to create QR codes for URLs, Wi-Fi, menus and more — no sign-up, no download. Make yours in…
November 9, 2026JPG to PNG: Convert JPG to PNG Free in Seconds
Learn how to convert jpg to png free in seconds — no software, no upload. Keep quality, get transparency, and convert images…
November 9, 2026How to Straighten a Tilted Photo the Right Way
Learn how to straighten tilted photo horizons fast — fix crooked lines, rotate without losing quality, and straighten any photo…
November 8, 2026What Is SHA-256 Hash Used For? A Simple Guide
Learn what is SHA-256 hash used for — passwords, downloads, and blockchains — with a real example and a free hash generator.
November 8, 2026How to Calculate Fuel Cost Commute
Learn how to calculate fuel cost commute figures with a simple formula, a worked 30 km example, and a car vs. public transport…
November 7, 2026What Is Unix Timestamp? A Simple Guide
What is Unix timestamp? Learn what those 10-digit numbers mean, how to read them, and how to convert any timestamp to a date.
November 7, 2026