Online Tools

This online tool provides a fun and practical way to make random choices, ideal for decisions in meetings, interactive games, and beyond.

Create random groups from a participant list with flexible size or count options.

Simulate a Japanese shrine omikuji and draw fortunes from great blessing to great curse online.

Generate random strings with various customization options using this free online tool.

Generate multiple UUIDs in versions 1, 3, 4, and 5 with custom namespace options.

Generate multiple ULIDs that stay sortable by time and easy to read.

This free online tool can help you easily generate globally unique IDs calculated by Twitter's Snowflake algorithm.

Create random meaningless essays based on a topic using this free online tool.

Convert colors between RGB, HEX, HSL, CMYK and HWB formats with this free online tool.

Turn Unix Timestamps into human-readable dates using this free online converter.

This free online tool can help you check and display the current time.

Start, stop, and reset a basic stopwatch with this free online tool.

Set a time and count down to zero with this free online tool.

Select your resignation date to follow the countdown and capture the words you want to share as you move forward.

Set your workday start and end times to see real-time progress, remaining time, and motivating updates.

Enter enlistment and discharge dates to follow your service progress in real time with day or hour precision plus encouraging status messages.

Enter two time values to get their sum and difference.

Add days or hours to a starting moment, calculate date differences, and filter out weekends or custom days.

Paste almost any date or time string to instantly view ISO, RFC, local, UTC, Unix timestamps, and relative differences with handy copy and share controls.

Enter a cron expression to see its human-readable description and upcoming run times.

A puzzle game combining Japanese learning with match-and-connect mechanics. Tap cards to hear pronunciations, match identical kana, and connect them to clear the board. Learn the Japanese syllabary naturally while solving puzzles and aiming for higher scores!

Fill the numbers 1-9 in the grid to solve the Sudoku puzzle.

Calculate returns, return rates, and annualized return rates for single or multiple assets with precision.

Upload futures trade records to visualize equity curves and evaluate performance and risk metrics. All data is processed locally in your browser and never uploaded to any server.

Search and filter Taiwan Stock Exchange listed companies by keyword or industry, and review key corporate details.

Track Taiwan-listed companies using P/E ratio, dividend yield, price-to-book ratio, and monthly average price to quickly gauge valuation opportunities.

Experiment with Conway's Game of Life.

Play Gomoku against the computer or a friend.

Play Tic-Tac-Toe against the computer or a friend.

Play Reversi against the computer or a friend.

Play the classic snake game.

Customize a pre-show checklist, track what you've packed, and share the link with friends heading to the same concert.

Customize a travel packing list, check off items as you prepare, and share the link with your travel companions.

Track baseball games with configurable inning formats, fullscreen display, automatic local saving, and quick reset controls.

Track basketball scores, periods, and a customizable game clock with fullscreen mode and local autosave.

Manage cricket matches with selectable formats, fullscreen view, local autosave, and quick reset controls.

Track football scores with configurable match formats, fullscreen display, and automatic local saving.

Track volleyball matches with configurable formats, fullscreen display, local autosave, and quick reset controls.

Keep track of table tennis games with configurable formats, fullscreen display, local autosave, and quick reset controls.

Track tennis points, games, and sets with customizable formats, fullscreen mode, and automatic local saving.

Convert Traditional Chinese text to Simplified Chinese using advanced settings with this free online tool.

Convert Simplified Chinese text to Traditional Chinese with advanced options using this free online tool.

Replace tabs with a specified number of spaces using this free online tool.

Convert text between uppercase, lowercase, title case and random case with this free online tool.

This free online tool helps you easily compare differences in your JSON data

This free online tool helps you easily compare differences in your YAML data

This free online tool helps you easily compare differences in your TOML data

This free online tool helps you easily compare differences in your text data

Minify your json data with this free online JSON minifier.

Minify your html code with this free online HTML minifier.

Minify your js code with this free online JavaScript minifier.

Minify your css code with this free online CSS minifier.

Combine and merge multiple JSON objects into one seamlessly. Essential free online JSON merger for API integration, data consolidation, and configuration management tasks.

Merge two different YAML into one using this free online YAML merger with various advanced options.

Merge two different TOML into one using this free online TOML merger with various advanced options.

Convert images into ICO files by selecting your preferred icon size with this free online tool.

Easily convert images to PNG format with multiple advanced options using this free online service.

Effortlessly convert images to JPG format with various customization options using this free online service.

Convert images to BMP format with advanced customization options using this free online tool.

Seamlessly convert images to TIFF format with multiple settings using this free online service.

Create QR Codes with various advanced settings using this free online tool.

Edit mermaid charts and diagrams effortlessly with this free online editor.

Convert your JSON data to TOML format with various advanced options using this free online converter.

Convert your JSON data to TOML format using this free online converter with various advanced options.

Convert your JSON to JavaScript object format with various advanced options using this free online converter.

Convert your JSON to Python dict format using this free online converter with various advanced options.

Convert your JSON data into Go struct definitions with automatic type inference using this free online converter.

Paste your CREATE TABLE statements to instantly generate idiomatic Go struct definitions with customizable naming rules.

Convert your YAML data to JSON format using this free online converter with various advanced options.

Convert your YAML data to TOML format using this free online converter with various advanced options.

Convert your YAML to JavaScript object format using this free online converter with various advanced options.

Convert your TOML data to JSON format using this free online converter with various advanced options.

Convert your TOML data to YAML format using this free online converter with various advanced options.

Convert your TOML to JavaScript object format using this free online converter with various advanced options.

Convert your JavaScript object to JSON format with various advanced options using this free online converter.

Convert your JavaScript object to YAML format using this free online converter with various advanced options.

Convert your JavaScript object to TOML format using this free online converter with various advanced options.

Convert your JavaScript object to Python dict format using this free online converter with various advanced options.

Convert your Python dict to JSON format using this free online converter with various advanced options.

Convert your Python dict to YAML format using this free online converter with various advanced options.

Convert your Python dict to TOML format with various advanced options using this free online converter.

Convert your Go struct definitions into JSON examples with this free online converter, including nested structs, slices, and maps.

This free online tool helps you easily convert between US customary units (feet + inches, pounds) and metric units (centimeters, kilograms).

Generate MD5 hash values from text, passwords, and files instantly. Free online MD5 generator for data integrity verification, checksums, and development tasks.

Generate SHA-1 hash values from text, passwords, and files instantly. Free online SHA-1 generator for cryptographic hashing, digital signatures, and security applications.

Generate SHA-224 hash values from text, passwords, and files instantly. Free online SHA-224 generator for enhanced security, data integrity, and cryptographic applications.

Generate SHA-256 hash from any string with this free online SHA-256 generator.

Generate SHA-384 hash from any string with this free online SHA-384 generator.

Generate SHA-512 hash from any string with this free online SHA-512 generator.

Convert text, files, and data to Base64 encoding instantly with our free online Base64 encoder. Perfect for developers, web designers, and data processing tasks.

Decode Base64 encoded strings back to original text, files, and data instantly. Free online Base64 decoder for developers, programmers, and data analysis tasks.

Encode your data into Base32 format with this free online Base32 encoder.

Decode your Base32 encoded string with this free online Base32 decoder.

Convert text to URL-safe format with percent encoding. Essential free online tool for web developers, API integration, and HTTP parameter handling.

Decode URL-encoded strings back to readable text instantly. Essential free online tool for web developers, debugging URLs, and processing HTTP parameters.

Format, beautify, and validate JSON data instantly. Essential free online JSON formatter for web developers, API testing, debugging, and data visualization tasks.

Format, beautify, and validate YAML configuration files instantly. Essential free online YAML formatter for DevOps engineers, system administrators, and configuration management.

Format, beautify, and validate XML documents instantly. Essential free online XML formatter for web developers, SOAP services, RSS feeds, and enterprise application integration.

Format your HTML code with this free online HTML formatter with various advanced options.

Format your JavaScript code with this free online JavaScript formatter with various advanced options.

Format your CSS code with this free online CSS formatter with various advanced options.

Format your SQL code with this free online SQL formatter with various advanced options.

View your JSON data in a user-friendly format using this free online tool.

View Chinese zodiac signs with corresponding Gregorian and ROC years and ages.

Display zodiac signs with their corresponding birth date ranges.

Quickly compare MBTI roles, strengths and cognitive stacks with handy filters.

Explore common NBA lingo with clear explanations, abbreviations, and modern analytics.

Browse the complete Unicode emoji set with localized names, keywords, code points, and version info. Multilingual search supported.

Compare bra band sizes and cup measurements across Taiwan, US/UK, Europe, and Japan with optional filters.

Explore international size comparisons for tops and bottoms across men, women, and kids. Filter the chart and quickly match regions side by side.

Browse a practical chart of adult shoe sizes across regions and compare any two countries side by side.

Compare popular 16:9 TV sizes with their width, height, screen area, and suggested viewing distances for 1080p and 4K. Use filters to quickly find the sizes that fit your room.

Validate People's Republic of China resident identity numbers with format checks, birthdate parsing, checksum explanations, and a compliant random generator.

Verify Macau resident identity card (BIR) numbers with format guidance, weighted check digit calculation, and an optional random generator.

Verify Italian codice fiscale numbers instantly with format validation, birthdate decoding, check character calculation, and a compliant random generator.

Verify Brazilian CPF numbers instantly with format validation, repeated-digit detection, checksum explanation, and a compliant random generator.

Verify Taiwan citizen ID numbers instantly with format rules, checksum calculation, and an optional random generator.

Verify Hong Kong identity card numbers instantly with format rules, weighted check digit calculation, and a random HKID generator.

Verify Spanish DNI and NIE identification numbers instantly with format validation, modulus-23 check letter calculation, and a compliant random generator.

Validate India Aadhaar numbers with 12-digit format rules, starting digit requirements, and Verhoeff checksum analysis. Includes a compliant random number generator for testing.

Validate international phone numbers, view E.164 and national formats, and generate random compliant samples for testing.

Generate RSA public and private keys entirely in your browser with adjustable key sizes.

Increase or decrease numbers with a customizable step in this free online counter.

Check your IP address along with your geographical location using this free online tool.

Evaluate your screen for various issues like dead pixels and light bleeding using this free online tool.

Verify that your keyboard keys work correctly with this interactive tester.

Upload a portrait, write your bio, and share a polished personal profile directly through the URL.

Discover countdown timers, resignation helpers, and empathetic content designed to cheer you on until freedom.

Explore the story behind Paji toolset: A software engineer's journey in creating essential online tools for everyday use.

This section outlines our privacy policy, explaining how we handle and protect your personal data.