DPI / PPI Calculator Calculate the pixel density (PPI/DPI) of any screen from its resolution and physical diagonal size. Enter width and height in pixels and the diagonal screen size in inches to instantly see pixels per inch, dot pitch, total pixel count, and a full display properties table. How to Use Enter your display’s ...
Try the Tool »Regex Flavor Converter Convert regular expressions between programming language flavors: PCRE (PHP), JavaScript, Python, Go, Java, and Ruby. Automatically converts named groups, flags, backreferences, and other syntax differences. Highlights incompatible features with clear warnings. Includes a test panel to validate your converted regex against sample strings. How to Use Enter your regex pattern, select the ...
Try the Tool »CORS Headers Builder & Validator Build correct CORS (Cross-Origin Resource Sharing) headers with a visual configurator. Set allowed origins, methods, headers, and credentials, then get the generated HTTP headers and ready-to-use code snippets for Express.js, Nginx, Apache, Django, FastAPI, Flask, and Go. Real-time validation catches common CORS misconfigurations before they reach production. How to Use ...
Try the Tool »Circle & Ellipse Calculator Calculate all properties of circles and ellipses from any known measurement. In circle mode, enter any single value — radius, diameter, circumference, or area — and get all other measurements instantly, plus sector and segment calculations for any angle. In ellipse mode, enter the semi-major and semi-minor axes to get area, ...
Try the Tool »Discount & Markup Calculator Calculate markups, margins, discounts, and pricing in one versatile tool. Five calculation modes cover every common pricing scenario: markup from cost, profit margin analysis, discount from original price, reverse discount to find the original price, and stacked discounts for multiple sequential reductions. Includes a bulk pricing table, a clear margin vs ...
Try the Tool »Running Pace Calculator Calculate running pace, speed, distance, or time from any two known values. Enter your distance and finish time to get your pace per kilometer and mile, or set a target pace to find your expected finish time. Includes race distance presets from 5K to 100K ultra, a splits table with negative split ...
Try the Tool »Body Fat Percentage Calculator Estimate your body fat percentage using two established methods: the US Navy circumference method and the BMI-based formula. Enter your measurements in metric or imperial units, select your sex, and get your estimated body fat percentage, BMI, fat mass, lean mass, and fitness category. A visual spectrum bar shows where you ...
Try the Tool »Statistics Calculator Calculate comprehensive descriptive statistics for any dataset. Paste or type a list of numbers and instantly get mean, median, mode, standard deviation, variance, quartiles, skewness, kurtosis, and more. Includes a histogram visualization, frequency distribution table, five-number summary, and the option to toggle between population and sample calculations. Export your results as CSV. How ...
Try the Tool »Compression Ratio Calculator Calculate compression ratio, space savings percentage, and size reduction from original and compressed file sizes. Enter sizes in any unit (B, KB, MB, GB, TB) and instantly see the compression ratio, bits per byte, space saved, and effective throughput metrics. How to Use Enter the original file size and its unit, then ...
Try the Tool »SSH Key Generator Generate SSH key pairs directly in your browser using the Web Crypto API. Supports Ed25519 (recommended), ECDSA P-256/P-384, and RSA 2048/4096. Your private key is generated locally and never leaves your browser. Download keys in OpenSSH format, view fingerprints, and get quick setup commands. How to Use Select your preferred algorithm (Ed25519 ...
Try the Tool »SVG Wave & Divider Generator Create beautiful SVG wave section dividers for your website. Choose from 6 wave styles — smooth sine, layered waves, sharp zigzag, rounded hills, asymmetric, and organic blob — customize amplitude, frequency, colors, and layers, then export as SVG code, CSS background, HTML snippet, or downloadable SVG file. Optional CSS animation ...
Try the Tool »Volume Converter The Volume Converter is a free online tool that instantly converts volume and capacity measurements between metric, US customary, and imperial units. Enter a value in any field — milliliters, liters, cups, gallons, cubic feet, or any other supported unit — and see every equivalent value update in real time. The converter clearly ...
Try the Tool »Pressure Converter Convert between 12 pressure units instantly across SI, engineering, and weather/medical categories. Enter a value in Pascal, bar, atmosphere, psi, torr, or any other supported unit and see all equivalents update in real time. Includes quick-select buttons for common pressures like standard atmosphere, car tire pressure, and blood pressure readings, plus a reference ...
Try the Tool »Loan Affordability Calculator Find out exactly how much you can afford to borrow based on your income and existing debts. Enter your monthly gross income, current debt payments, desired interest rate, and loan term to get your maximum affordable loan amount, monthly payment, and debt-to-income ratios. Includes loan type presets for mortgages, personal loans, and ...
Try the Tool »Docker Container Resource Calculator Calculate optimal CPU and memory resource limits for Docker containers and Kubernetes pods based on your host capacity and workload type. Enter your available CPU cores and RAM, select a workload preset, and get ready-to-use Docker run flags, Kubernetes resource YAML, and Docker Compose snippets with copy buttons. Handles multi-container scenarios ...
Try the Tool »Audio File Size Calculator Calculate the exact file size of audio recordings based on format, bitrate, duration, and quality settings. Supports MP3, AAC, OGG Vorbis, WAV, and FLAC with configurable bitrate, sample rate, bit depth, and channel count. Includes a podcast hosting estimator for monthly storage and bandwidth, a quality comparison table showing all bitrates ...
Try the Tool »JSON Flattener & Unflattener Convert nested JSON structures to flat dot-notation key-value pairs, or reverse the process to rebuild nested objects from flat keys. This bidirectional tool handles deeply nested objects, arrays with index notation, custom delimiters, and configurable depth limits — all client-side in your browser. Perfect for working with NoSQL databases, environment variable ...
Try the Tool »Time Zone Converter Convert a date and time across multiple time zones simultaneously. Enter a source date, time, and time zone, then add as many target time zones as needed to see the converted times side by side. Supports 24-hour format toggle and all IANA time zones including DST-aware conversions. How to Use Set your ...
Try the Tool »SVG Pattern Generator Create seamless geometric tile patterns with live preview. Choose from 12 pattern types — dots, lines, grids, hexagons, chevrons, triangles, and more — customize colors, size, spacing, and rotation, then export as SVG code, CSS background, or downloadable SVG file. Everything runs in your browser with instant visual feedback. How to Use ...
Try the Tool »Fake Test Data Generator Generate realistic fake test data with a custom schema. Define your fields (names, emails, UUIDs, addresses, dates, and more), set the row count, and export as JSON, CSV, or NDJSON. Everything runs in your browser — no server processing, no data leaves your machine. How to Use Build your schema using ...
Try the Tool »Add IO tools to your favorite browser for instant access and faster searching
Scoreboard is a fun way to keep track of your games, all data is stored in your browser. More features are coming soon!
Update: Our latest tool was added on May 10, 2026
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