https://toolact.com/en Free online developer tools - JSON formatter, Base64 encoder, hash generator, and 112+ browser-based tools. en Fri, 29 May 2026 08:18:03 GMT https://toolact.com/en/json-formatter https://toolact.com/en/json-formatter Free online JSON formatter, validator, minifier, and tree viewer with syntax highlighting. Beautify JSON, detect errors, and clean up data in your browser. https://toolact.com/en/xml-formatter https://toolact.com/en/xml-formatter Free online XML formatter with auto-indentation, validation & minification. Customize indentation settings, quickly detect XML format errors. https://toolact.com/en/yaml-formatter https://toolact.com/en/yaml-formatter Free online YAML formatter with syntax checking, auto-indentation & format conversion. Handle config files easily, spot syntax issues instantly. https://toolact.com/en/html-formatter https://toolact.com/en/html-formatter Free online HTML formatter with code beautification, minification & syntax highlighting. Clean up messy HTML code instantly, improve readability. https://toolact.com/en/css-formatter https://toolact.com/en/css-formatter Free online CSS formatter with code beautification, minification & syntax highlighting. Organize CSS stylesheets instantly, optimize front-end code quality. https://toolact.com/en/js-formatter https://toolact.com/en/js-formatter Free online JavaScript formatter with code beautification, minification & syntax checking. Clean up JS code instantly, improve code readability. https://toolact.com/en/sql-formatter https://toolact.com/en/sql-formatter Free online SQL formatter with beautify, minify, keyword case conversion, and syntax highlighting. Clean up SQL queries and make them easier to read. https://toolact.com/en/java-formatter https://toolact.com/en/java-formatter Free online Java formatter with code beautification, minification & syntax checking. Clean up Java code instantly, improve code readability. https://toolact.com/en/python-formatter https://toolact.com/en/python-formatter Free online Python formatter with code beautification, minification & syntax checking. Clean up Python code instantly, improve code readability. https://toolact.com/en/base64 https://toolact.com/en/base64 Free online Base64 encoder and decoder for UTF-8 text, Unicode, and images. Convert Base64 instantly with local browser processing and no signup. https://toolact.com/en/json-escape https://toolact.com/en/json-escape Free online JSON escape tool for quick JSON string escaping and unescaping. Handle quotes, newlines, tabs and special characters, easy code embedding. https://toolact.com/en/url-encode https://toolact.com/en/url-encode Free online URL encoder and decoder for parameters, Unicode text, and special characters. Fix URL encoding issues instantly in your browser. https://toolact.com/en/html-encode https://toolact.com/en/html-encode Free online HTML entity encoder & decoder converting special characters to HTML entities. Prevent XSS attacks, ensure safe HTML display. https://toolact.com/en/unicode https://toolact.com/en/unicode Free online Unicode encoder & decoder supporting multiple formats: \uXXXX, &#xXXXX;, etc. Handle internationalized text easily, solve encoding issues. https://toolact.com/en/csv-to-json https://toolact.com/en/csv-to-json Free online CSV to JSON converter with custom delimiter support and first-row-as-header option. Quickly convert tabular data to JSON format for programming use. https://toolact.com/en/csv-to-sql https://toolact.com/en/csv-to-sql Online CSV to SQL tool, supports custom table names, delimiters, and quote styles. Quickly convert CSV data to SQL INSERT statements for easy database import. https://toolact.com/en/excel-to-json https://toolact.com/en/excel-to-json Online Excel to JSON converter. Supports .xlsx and .xls formats with multiple sheet selection. Convert spreadsheet data to JSON format locally. https://toolact.com/en/excel-to-sql https://toolact.com/en/excel-to-sql Online Excel to SQL converter. Supports .xlsx and .xls formats with multiple sheet selection. Convert spreadsheet data to SQL INSERT statements locally. https://toolact.com/en/qr-code-decoder https://toolact.com/en/qr-code-decoder Free online QR code decoder. Upload images, drag & drop, or paste from clipboard to scan and decode QR codes. All processing happens in your browser for privacy. https://toolact.com/en/barcode-decoder https://toolact.com/en/barcode-decoder Free online barcode decoder. Upload, drag and drop, or paste an image to scan CODE128, EAN13, EAN8, UPC, and CODE39 barcodes in your browser. https://toolact.com/en/zip-pack https://toolact.com/en/zip-pack Free online ZIP pack and compress tool. Add multiple files with drag and drop, then download a ZIP archive with local browser processing. https://toolact.com/en/zip-unpack https://toolact.com/en/zip-unpack Free online ZIP extractor. Upload a ZIP archive to preview files, download selected items, or extract everything with local browser processing. https://toolact.com/en/md5 https://toolact.com/en/md5 Free online MD5 encryption tool with 16-bit and 32-bit output options, uppercase and lowercase conversion. Generate text MD5 hash values for data verification. https://toolact.com/en/hash https://toolact.com/en/hash Free online hash generator supporting MD5, SHA-1, SHA-256, SHA-512 algorithms. Generate text hashes instantly for data verification and password storage. https://toolact.com/en/file-md5 https://toolact.com/en/file-md5 Free online file MD5 checksum tool to calculate file MD5 hash values. Verify file integrity, detect tampering, ensure downloaded files are safe. https://toolact.com/en/md5-modifier https://toolact.com/en/md5-modifier Free online MD5 modifier tool to change file MD5 by appending random data. Batch processing up to 5 files, local processing protects privacy. https://toolact.com/en/file-hash https://toolact.com/en/file-hash Free online file hash calculator supporting MD5, SHA-1, SHA-256, SHA-512 and more. Calculate file hashes in one click, verify file integrity. https://toolact.com/en/password https://toolact.com/en/password Free online password generator with customizable length and character sets. Create strong random passwords locally in your browser. https://toolact.com/en/jwt https://toolact.com/en/jwt Free online JWT parser to decode and verify JSON Web Tokens. View Header and Payload content, debug API authentication issues. https://toolact.com/en/jwt-generator https://toolact.com/en/jwt-generator Free online JWT generator to create tokens with custom Header and Payload. Supports multiple algorithms, generate test JWTs quickly. https://toolact.com/en/aes https://toolact.com/en/aes Free online AES encryption and decryption tool for AES-128/192/256 with CBC, GCM, and ECB modes. Local browser processing protects your data. https://toolact.com/en/des https://toolact.com/en/des Free online DES and 3DES encryption/decryption tool with ECB and CBC modes plus PKCS7 padding. All processing happens in your browser. https://toolact.com/en/rsa https://toolact.com/en/rsa Free online RSA encryption and decryption tool. Generate key pairs, encrypt with a public key, and decrypt with a private key in your browser. https://toolact.com/en/regex https://toolact.com/en/regex Free online regex tester with real-time matching and highlighted results. Supports common regex library, help debug and validate regular expressions. https://toolact.com/en/text-diff https://toolact.com/en/text-diff Free online text comparison tool highlighting differences between two texts. Line-by-line comparison, quickly find added, deleted, modified content. https://toolact.com/en/word-counter https://toolact.com/en/word-counter Free online word counter with real-time statistics for characters, words, reading time and more. Essential writing assistant tool. https://toolact.com/en/text-case https://toolact.com/en/text-case Free online case converter supporting camelCase, snake_case, kebab-case, CONSTANT and more naming formats. Developer essential, convert variable names instantly. https://toolact.com/en/chinese-converter https://toolact.com/en/chinese-converter Free online Chinese converter for Simplified and Traditional Chinese. Convert text with Mainland China, Taiwan, and Hong Kong vocabulary rules. https://toolact.com/en/string-reverse https://toolact.com/en/string-reverse Free online string reversal tool with full text, word-by-word, line-by-line modes. Fun text processing for various needs. https://toolact.com/en/markdown-editor https://toolact.com/en/markdown-editor Free online Markdown editor with real-time preview, syntax highlighting & HTML export. Supports tables, code blocks, diagrams, write more efficiently. https://toolact.com/en/teleprompter https://toolact.com/en/teleprompter Free online teleprompter with smooth auto-scroll, fullscreen mode, mirrored text, and adjustable reading pace for video recording, speeches, and livestreams. https://toolact.com/en/text-deduplicate https://toolact.com/en/text-deduplicate Free online text deduplication tool supporting line, word, sentence, and paragraph modes. Remove duplicate content with case sensitivity and order options. https://toolact.com/en/char-frequency https://toolact.com/en/char-frequency Free online character frequency analysis tool. Count occurrences and frequency of each character in your text with case sensitivity and space options. https://toolact.com/en/pinyin-converter https://toolact.com/en/pinyin-converter Free online Chinese to Pinyin converter with tone marks, tone numbers, no-tone mode, custom separators, and capitalization options. https://toolact.com/en/remove-newlines https://toolact.com/en/remove-newlines Free online tool to remove line breaks from text. Supports removing all newlines, converting newlines to spaces, removing empty lines, and merging empty lines. Runs locally in your browser. https://toolact.com/en/timestamp https://toolact.com/en/timestamp Free online timestamp converter for Unix timestamp to datetime format conversion. Supports millisecond and second timestamps, display multiple timezones. https://toolact.com/en/countdown https://toolact.com/en/countdown Free online countdown timer to create custom countdowns. Set target time, reminder features, accurate to seconds, suitable for various scenarios. https://toolact.com/en/gaokao-countdown https://toolact.com/en/gaokao-countdown Gaokao countdown timer showing days, hours, minutes, and seconds until China's National College Entrance Examination, with automatic exam-year detection. https://toolact.com/en/baby-days https://toolact.com/en/baby-days Free online baby days calculator to track days, weeks, and months since birth. Shows growth milestones, cherish every moment with your baby. https://toolact.com/en/due-date https://toolact.com/en/due-date Free online due date calculator based on LMP, IVF, or ultrasound data. Shows pregnancy week and progress. https://toolact.com/en/lifespan-calculator https://toolact.com/en/lifespan-calculator Free online lifespan calculator to visualize your life progress. Calculate percentage of life lived based on birthdate and life expectancy. https://toolact.com/en/sleep-calculator https://toolact.com/en/sleep-calculator Free online sleep calculator. Find optimal sleep and wake times based on 90-minute sleep cycles for better rest. https://toolact.com/en/date-difference https://toolact.com/en/date-difference Free online date difference calculator. Calculate days, weeks, months, years between two dates. Precise calculations with hours, minutes, seconds display. https://toolact.com/en/date-add-subtract https://toolact.com/en/date-add-subtract Free online date add/subtract calculator. Add or subtract days, weeks, months, years from a date. Quick options for instant calculations. https://toolact.com/en/age-calculator https://toolact.com/en/age-calculator Free online age calculator. Calculate exact age, Chinese zodiac, total days lived, and days until next birthday from birth date. https://toolact.com/en/workday-calculator https://toolact.com/en/workday-calculator Free online workday calculator. Count actual working days within a date range, excluding weekends and holidays. Perfect for project planning. https://toolact.com/en/lunar-calendar https://toolact.com/en/lunar-calendar Free online Gregorian to Lunar calendar converter. Query zodiac, solar terms, traditional festivals. Supports 1900-2100 range, learn lunar calendar info. https://toolact.com/en/pomodoro https://toolact.com/en/pomodoro Free online Pomodoro timer for scientific time management. 25 minutes of focused work, 5 minutes of short breaks, boost productivity and build focus habits. https://toolact.com/en/flip-clock https://toolact.com/en/flip-clock Free online flip clock with live time, 12/24-hour mode, optional seconds, and fullscreen display for desks, presentations, and focus sessions. https://toolact.com/en/dynasty-table https://toolact.com/en/dynasty-table Complete chronological table of Chinese dynasties from Xia to Qing dynasty, with dates, founding emperors, and capital cities. https://toolact.com/en/world-clock https://toolact.com/en/world-clock Free online world clock tool. View current time, date, and weekday for cities worldwide. Search city timezones and see offset from local time. https://toolact.com/en/time-converter https://toolact.com/en/time-converter Online time unit converter - convert between years, months, weeks, days, quarters, hours, minutes, seconds, and milliseconds. Accurate calculations, instant results. https://toolact.com/en/expiry-calculator https://toolact.com/en/expiry-calculator Free online expiry date calculator. Calculate expiration dates from production dates and shelf life, or estimate production dates from expiry dates. https://toolact.com/en/uuid https://toolact.com/en/uuid Free online UUID generator creating RFC 4122 compliant unique identifiers. Supports UUID v1, v4 versions, batch generation. https://toolact.com/en/token-counter https://toolact.com/en/token-counter Free online token counter tool to estimate token count in AI models like GPT and Claude. Helps control prompt costs for API calls. https://toolact.com/en/http-status-code https://toolact.com/en/http-status-code Free online HTTP status code reference with all standard codes. Search and filter by category, quickly find 1xx to 5xx status code meanings. https://toolact.com/en/mime-types https://toolact.com/en/mime-types Free online MIME type lookup tool. Quickly find MIME types for file extensions. Search and filter by category, covering documents, images, audio, video and more. https://toolact.com/en/git-cheat-sheet https://toolact.com/en/git-cheat-sheet Free online Git commands cheat sheet with most commonly used Git commands. Organized by category with search and filter for quick Git command lookup. https://toolact.com/en/ascii-table https://toolact.com/en/ascii-table Free online ASCII table with control characters, printable characters, and extended codes. Search and filter ASCII values for quick lookup. https://toolact.com/en/cron https://toolact.com/en/cron Free online Cron expression tool to parse and generate Cron schedule expressions. Visual configuration, support second-level, Quartz extended syntax. https://toolact.com/en/json-to-typescript https://toolact.com/en/json-to-typescript Free online JSON to TypeScript converter auto-generating interface definitions. Supports nested objects, arrays, union types, accelerate TypeScript development. https://toolact.com/en/json-schema-generator https://toolact.com/en/json-schema-generator Free online JSON Schema generator that creates standards-compliant schemas from JSON data. Infer nested objects, arrays, required fields, and validation rules. https://toolact.com/en/ua-parser https://toolact.com/en/ua-parser Free online User-Agent parser tool. Instantly identify browser, operating system, and device info from any UA string. Essential tool for web developers. https://toolact.com/en/mermaid https://toolact.com/en/mermaid Free online Mermaid diagram editor for flowcharts, sequence diagrams, class diagrams, ER diagrams, Gantt charts, mind maps, and live PNG/SVG export. https://toolact.com/en/demo https://toolact.com/en/demo Server-side rendered demo page, demonstrating SSR fetching data from back-end API. Ideal for SEO-optimized pages. https://toolact.com/en/my-ip https://toolact.com/en/my-ip Free online IP address lookup tool. Instantly find your public IP address and geolocation info including country, city, and ISP. https://toolact.com/en/lan-transfer https://toolact.com/en/lan-transfer Free online LAN file transfer using WebRTC peer-to-peer sharing. Send files and text between devices on the same network without uploading to a server. https://toolact.com/en/port-checker https://toolact.com/en/port-checker Free online port checker. Test open ports on any IP address or domain, run batch checks, and view response times in your browser. https://toolact.com/en/whois https://toolact.com/en/whois Free online Whois domain lookup. Check registrar details, registration dates, expiration dates, DNS servers, and domain status for global TLDs. https://toolact.com/en/ssl-cert-checker https://toolact.com/en/ssl-cert-checker Free online SSL certificate checker. Verify SSL/TLS validity, expiration date, certificate chain, domain match, and HTTPS configuration issues. https://toolact.com/en/ping https://toolact.com/en/ping Free online ping test tool. Check server or domain connectivity, latency, packet loss, average response time, and min/max statistics. https://toolact.com/en/websocket-test https://toolact.com/en/websocket-test Free online WebSocket connection test tool. Send and receive WebSocket messages, JSON formatting, real-time debugging. Runs locally in your browser for privacy. https://toolact.com/en/length-converter https://toolact.com/en/length-converter Online length unit converter for kilometers, meters, centimeters, millimeters, miles, yards, feet, inches, nautical miles, and Chinese units. https://toolact.com/en/temperature-converter https://toolact.com/en/temperature-converter Online temperature converter for Celsius, Fahrenheit, and Kelvin. Get accurate instant conversions for weather, science, cooking, and baking. https://toolact.com/en/area-converter https://toolact.com/en/area-converter Online area unit converter for square kilometers, hectares, ares, square meters, square centimeters, mu, acres, square feet, and more. https://toolact.com/en/weight-converter https://toolact.com/en/weight-converter Online weight unit converter for metric tons, kilograms, grams, milligrams, pounds, ounces, jin, liang, and more with instant results. https://toolact.com/en/volume-converter https://toolact.com/en/volume-converter Online volume unit converter for cubic meters, liters, milliliters, gallons, cubic feet, cubic inches, and more with instant results. https://toolact.com/en/energy-converter https://toolact.com/en/energy-converter Online energy unit converter for joules, kilojoules, kilowatt-hours, calories, kilocalories, BTU, electron-volts, and more. https://toolact.com/en/data-storage-converter https://toolact.com/en/data-storage-converter Online data storage converter for bits, bytes, KB, MB, GB, TB, PB, EB, KiB, MiB, GiB, TiB, PiB, and EiB. https://toolact.com/en/base-converter https://toolact.com/en/base-converter Free online number base converter for binary, octal, decimal, hexadecimal, and custom bases. Convert numbers instantly and copy results. https://toolact.com/en/json-to-xml https://toolact.com/en/json-to-xml Free online JSON to XML converter with customizable root element and indentation. Convert JSON data to well-formatted XML instantly in your browser. https://toolact.com/en/xml-to-json https://toolact.com/en/xml-to-json Free online XML to JSON converter with customizable indentation. Convert XML data to well-formatted JSON instantly in your browser. https://toolact.com/en/keyboard-test https://toolact.com/en/keyboard-test Free online keyboard test with live key detection, key codes, a virtual keyboard, and key history. Check every key directly in your browser. https://toolact.com/en/mouse-test https://toolact.com/en/mouse-test Free online mouse test for buttons, scroll wheel, double-click behavior, pointer position, and click history. Check your mouse in the browser. https://toolact.com/en/refresh-rate https://toolact.com/en/refresh-rate Free online screen refresh rate test tool. Detect actual monitor refresh rate through animation frame rate, supports 60Hz, 120Hz, 144Hz and higher. https://toolact.com/en/system-check https://toolact.com/en/system-check Free online system check tool. Detect your OS, browser, screen resolution, hardware config, and network status. Privacy-first local browser processing. https://toolact.com/en/decibel-meter https://toolact.com/en/decibel-meter Free online decibel meter, measure ambient noise levels in real time with gauge display, noise level classification, and statistics https://toolact.com/en/microphone-test https://toolact.com/en/microphone-test Free online microphone test with live volume, waveform, and spectrum analysis. Check recording playback, device info, and browser mic permissions. https://toolact.com/en/camera-test https://toolact.com/en/camera-test Free online camera test with live preview and photo capture. Check resolution and device info with privacy-friendly browser processing. https://toolact.com/en/image-base64 https://toolact.com/en/image-base64 Free online image to Base64 converter with drag-and-drop upload, real-time preview & multiple image formats. Embed images in code, reduce HTTP requests. https://toolact.com/en/image-compress https://toolact.com/en/image-compress Free online image compressor for JPEG, PNG, and WebP. Adjust quality and dimensions while local browser processing protects your privacy. https://toolact.com/en/image-to-webp https://toolact.com/en/image-to-webp Free online image to WebP converter. Convert JPG, PNG, and GIF files to WebP for smaller images with local browser processing. https://toolact.com/en/image-convert https://toolact.com/en/image-convert Free online image format converter for JPG, PNG, WebP, BMP, and GIF files. Adjust output quality and process images in your browser. https://toolact.com/en/image-watermark https://toolact.com/en/image-watermark Free online image watermark tool. Add text or image watermarks with adjustable position, opacity, and size using local browser processing. https://toolact.com/en/image-grayscale https://toolact.com/en/image-grayscale Free online image grayscale converter. Turn color images into black-and-white images with batch processing in your browser. https://toolact.com/en/image-to-pdf https://toolact.com/en/image-to-pdf Free online image to PDF converter. Convert JPG, PNG, WebP images to PDF with adjustable page size, orientation, and fit mode. All processing done locally in browser. https://toolact.com/en/id-photo https://toolact.com/en/id-photo Free online passport and ID photo maker with AI background removal. Create standard photos for US Passport, EU ID, UK Passport, and more. https://toolact.com/en/screen-record https://toolact.com/en/screen-record Free online screen recorder. Capture your screen, a window, or a browser tab with optional audio and instant video download. https://toolact.com/en/image-grid https://toolact.com/en/image-grid Free online image grid splitter. Divide an image into a 3×3 grid for Instagram, WeChat Moments, and other social media platforms. All processing is done locally in your browser. https://toolact.com/en/office-to-pdf https://toolact.com/en/office-to-pdf Free online Word to PDF converter for .docx and .doc files. Convert documents with layout preservation, optimized PDF output, and automatic file deletion. https://toolact.com/en/pdf-to-word https://toolact.com/en/pdf-to-word Free online PDF to Word converter. Export .docx or .doc files with layout and image preservation, one-click conversion, and automatic file deletion. https://toolact.com/en/excel-to-pdf https://toolact.com/en/excel-to-pdf Free online Excel to PDF converter for .xlsx, .xls, and .ods files. Preserve table layout, optimize PDF size, and delete files automatically. https://toolact.com/en/ppt-to-pdf https://toolact.com/en/ppt-to-pdf Free online PPT to PDF converter for .pptx, .ppt, and .odp files. Preserve slide layout, optimize PDF size, and delete files automatically. https://toolact.com/en/pdf-to-image https://toolact.com/en/pdf-to-image Free online PDF to image converter, convert each PDF page to high-quality PNG or JPEG. Select specific pages, adjust resolution, download individually or as ZIP. Browser-based processing protects your privacy. https://toolact.com/en/color-picker https://toolact.com/en/color-picker Free online color picker tool with HEX, RGB, HSL format conversion. Generate color palettes, get web colors, boost design efficiency. https://toolact.com/en/gradient https://toolact.com/en/gradient Free online CSS gradient generator to create linear and radial gradient backgrounds. Visual color adjustment, one-click CSS code copy. https://toolact.com/en/qr-code https://toolact.com/en/qr-code Free online QR code generator supporting text, URL, vCard types. Customize style, color, size, download high-quality images instantly. https://toolact.com/en/barcode-generator https://toolact.com/en/barcode-generator Free online barcode generator for CODE128, EAN13, EAN8, UPC, CODE39, and ITF14. Customize size and colors, then download PNG or SVG barcodes. https://toolact.com/en/screen-test https://toolact.com/en/screen-test Free online screen testing tool to detect dead pixels, bright spots, and backlight bleeding. Multiple solid color tests, contrast tests, evaluate display quality. https://toolact.com/en/solid-color https://toolact.com/en/solid-color Generate solid color background images online. Customize color and size with presets (1080p, 2K, 4K), download as PNG/JPG. Browser-based, privacy protected. https://toolact.com/en/svg-viewer https://toolact.com/en/svg-viewer Online SVG viewer and editor with live preview. Edit SVG code, inspect changes in real time, and download SVG files for front-end design work. https://toolact.com/en/bmi-calculator https://toolact.com/en/bmi-calculator Free online BMI calculator for body mass index, healthy weight ranges, and weight category estimates using height, weight, age, and gender inputs. https://toolact.com/en/bmr-calculator https://toolact.com/en/bmr-calculator Free online BMR and TDEE calculator. Estimate basal metabolic rate, daily calorie needs, and activity-based energy expenditure. https://toolact.com/en/body-fat-calculator https://toolact.com/en/body-fat-calculator Free online body fat calculator using common measurement methods. Estimate body fat percentage, lean body mass, and body composition. https://toolact.com/en/blood-type-calculator https://toolact.com/en/blood-type-calculator Free online blood type inheritance calculator. Predict possible child blood types from parents or possible parent combinations from a child blood type. https://toolact.com/en/mortgage-calculator https://toolact.com/en/mortgage-calculator Free online mortgage calculator. Calculate monthly payments, total interest for commercial loans, provident fund loans, and combined loans. https://toolact.com/en/income-tax-calculator https://toolact.com/en/income-tax-calculator 2026 China personal income tax calculator. 7-level progressive tax rates, social insurance and special deductions auto-calculation. https://toolact.com/en/social-insurance-calculator https://toolact.com/en/social-insurance-calculator China social insurance and housing fund calculator for pension, medical, unemployment, injury, maternity, and provident fund contributions. https://toolact.com/en/decision-wheel https://toolact.com/en/decision-wheel Free online decision wheel and choice spinner. Enter options, spin the wheel, and pick a random result for food, games, raffles, or quick decisions. https://toolact.com/en/scoreboard https://toolact.com/en/scoreboard Free online scoreboard tool, add multiple players, custom scoring, real-time ranking. Perfect for board games, parties, sports and competitions. https://toolact.com/en/scientific-calculator https://toolact.com/en/scientific-calculator Free online scientific calculator with trigonometric functions, logarithms, exponentials, factorials, powers, and degree/radian mode https://toolact.com/en/random-picker https://toolact.com/en/random-picker Free online random picker tool for raffles and draws. Uses cryptographic random algorithm for fairness, with draw animation and duplicate options. https://toolact.com/en/kinship-calculator https://toolact.com/en/kinship-calculator Free online Chinese kinship title calculator. Enter a relationship chain to find the correct family title by lineage, gender, and birth order. https://toolact.com/en/id-age-calculator https://toolact.com/en/id-age-calculator Free online ID card age calculator. Batch parse Chinese ID numbers, calculate ages, view statistics including age distribution, gender ratio. Supports CSV export. https://toolact.com/en/crash-simulator https://toolact.com/en/crash-simulator Free online computer crash simulator for fake Windows BSOD, macOS kernel panic, Linux crash, and Android ANR screens. Full-screen display with click-to-exit. https://toolact.com/en/upgrade-simulator https://toolact.com/en/upgrade-simulator Free online system upgrade simulator for fake Windows Update, macOS update, Linux apt upgrade, and Android update screens. Full-screen and click-to-exit. https://toolact.com/en/mental-math https://toolact.com/en/mental-math Free online mental math speed test. Test your arithmetic speed and accuracy with addition, subtraction, multiplication and division. https://toolact.com/en/reaction-test https://toolact.com/en/reaction-test Free online reaction speed test tool. Test your reaction time from signal to click, track your best score and average, challenge your limits. https://toolact.com/en/typing-speed-test https://toolact.com/en/typing-speed-test Online click speed test tool. Measure your clicks per second (CPS) with 5s, 10s, 30s modes. Track your best score and challenge your clicking speed limit. https://toolact.com/en/coin-flip https://toolact.com/en/coin-flip Free online coin flip simulator. Flip a coin to get random heads or tails results. Track statistics, perfect for making decisions or having fun. https://toolact.com/en/rmb-converter https://toolact.com/en/rmb-converter Free online RMB amount converter between numeric and Chinese uppercase format. Precise to fen, perfect for checks, invoices, and financial documents.