Free browser-based utilities that streamline coding tasks with instant text processing, data conversion, and validation capabilities.
Cron Next-Run Time Calculator Enter a cron expression and instantly see when it will fire next. This tool parses standard 5-field cron expressions, calculates the next scheduled run times, generates a human-readable description, and shows a countdown to the next execution — all in your local timezone and UTC. How to Use Type or paste ...
Try the Tool »Color Contrast Grid Generator Enter your brand or design system colors and generate a complete WCAG contrast matrix showing the contrast ratio for every possible foreground/background combination. Instantly see which color pairs pass AA, AAA, or fail accessibility requirements — essential for building accessible design systems and style guides. How to Use Enter hex colors ...
Try the Tool »Base85 / Ascii85 Encoder & Decoder Encode text to Base85 or decode Base85-encoded data back to its original form. Base85 encoding converts 4 bytes of binary data into 5 printable ASCII characters, offering better space efficiency than Base64 (25% overhead vs 33%). This tool supports three major Base85 variants used across different applications. How to ...
Try the Tool »Credit Card BIN / IIN Lookup Enter the first 6-8 digits of any credit or debit card number to identify the card network, issuing bank, country of issuance, card type, and category. This tool also includes Luhn algorithm validation to check if a full card number has a valid format. Everything runs in your browser ...
Try the Tool »Hex Dump Viewer View any text or file as a hex dump in the classic xxd format — offset address, grouped hex bytes, and printable ASCII characters side by side. Upload a binary file or paste text to inspect raw byte values, search for patterns, and configure the display to match your preferred format. How ...
Try the Tool »Time Duration Formatter Convert any duration — entered in seconds, milliseconds, or clock format — into multiple human-readable representations simultaneously. See verbose, short, ISO 8601, clock, and approximate formats side by side, with a full breakdown by time unit. How to Use Select your input mode (Seconds, Milliseconds, or Clock hh:mm:ss), enter your duration value, ...
Try the Tool »JWT Expiry & Lifetime Checker Paste a JSON Web Token to instantly check its expiry status, see a live countdown to expiration, and visualize the token’s lifetime on an interactive timeline. Decode all standard claims (iss, sub, aud, exp, iat, nbf) plus custom claims — all without needing the signing secret. Everything runs in your ...
Try the Tool »URL Canonicalizer & Normalizer Normalize URLs to their canonical form following RFC 3986 standards. This tool applies configurable normalization steps — lowercase scheme and host, remove default ports, sort query parameters, resolve dot segments, and more — with side-by-side comparison and diff highlighting to show exactly what changed. How to Use Enter one or more ...
Try the Tool »Bencode Encoder / Decoder Encode JSON to Bencode format or decode Bencode back to JSON instantly. Bencode is the serialisation format used by BitTorrent for .torrent files and the DHT protocol. Paste Bencode input to decode it into readable JSON, or paste JSON to encode it into compact Bencode — all client-side with no data ...
Try the Tool »ROI Calculator Calculate return on investment instantly. Enter your initial investment and final value to see ROI percentage, annualized returns (CAGR), break-even timeline, and compare up to three investment scenarios side by side. All calculations update in real-time as you type. How to Use Enter your initial investment amount and either the final value or ...
Try the Tool »Salary to Hourly Rate Calculator Convert between annual salary, monthly, bi-weekly, weekly, daily, and hourly pay rates instantly. Configure work hours per day, days per week, and paid leave to get accurate conversions. Includes a simplified gross-to-net estimate and side-by-side salary comparison. How to Use Enter your salary amount and select the pay period (annual, ...
Try the Tool »VIN Generator Generate valid Vehicle Identification Numbers (VINs) for testing, development, and educational purposes. Each generated VIN follows the ISO 3779 standard with a correctly calculated check digit, realistic manufacturer codes, and proper formatting — making them suitable for software testing, database seeding, and learning how VINs work. How to Use Set the number of ...
Try the Tool »Random Email Generator Generate random email addresses for testing, development, and placeholder data. Create realistic-looking emails with common name patterns or random string usernames, paired with popular provider domains, fictional test domains, or your own custom domain. Perfect for populating test databases, QA workflows, and demo environments. How to Use Set the number of emails ...
Try the Tool »Random Address Generator Generate realistic fake street addresses for testing, development, and placeholder data. Create properly formatted addresses for the United States, United Kingdom, Canada, Australia, or Germany — complete with street numbers, street names, cities, states or provinces, and postal codes. Ideal for populating test databases, QA workflows, form testing, and demo environments. How ...
Try the Tool »Phone Number Generator Generate fake but properly formatted phone numbers for testing and development. Create numbers for the United States, United Kingdom, Canada, Australia, Germany, France, Japan, India, or Brazil — each following the correct country-specific format with valid area code patterns and proper digit lengths. Perfect for form testing, database seeding, and demo environments. ...
Try the Tool »Data Matrix Barcode Generator Generate Data Matrix 2D barcodes for serial numbers, product IDs, URLs, and other compact data. Data Matrix is the preferred barcode for electronics manufacturing, medical device labelling, and aerospace parts marking due to its extremely small printable size and high damage tolerance. Configure shape (square or rectangular) and module size, then ...
Try the Tool »GPA Calculator Calculate your semester and cumulative GPA instantly. Add courses with grades and credit hours, choose your grading scale, and see your weighted GPA update in real-time. Supports US 4.0, simplified 4.0, 5.0, and percentage scales. Includes cumulative GPA tracking and a what-if analysis to plan your target GPA. How to Use Select your ...
Try the Tool »Scientific Notation Converter & Calculator Convert numbers between standard, scientific, E-notation, and engineering notation instantly. Perform arithmetic (add, subtract, multiply, divide, power) on numbers in scientific notation with step-by-step solutions. Configure significant figures and reference common scientific constants. How to Use Enter any number in the converter — standard form (123456789), scientific notation (1.23 × ...
Try the Tool »PDF417 Barcode Generator Generate PDF417 stacked linear barcodes from text, IDs, shipping labels, or any structured data. PDF417 is the standard barcode format for US driver’s licences, boarding passes, and government IDs. Configure error correction level, column count, row height, and module scale, then download the result as a PNG. How to Use Enter your ...
Try the Tool »Fuel Economy Calculator Convert between fuel economy formats (MPG US, MPG UK, L/100km, km/L), calculate trip fuel costs, compare two vehicles side by side, estimate annual fuel expenses, and see CO2 emissions — all in one tool. Enter your values and results update instantly. How to Use Start with the fuel economy converter — enter ...
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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 3, 2026
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