免費線上工具 - 計算機、轉換器、產生器
超過 100 種免費線上工具：計算機、單位轉換、QR Code 產生器、密碼產生器、JSON 格式化等，無需安裝即可使用。
106 個工具
本期重點工具
這些工具已補齊個別使用說明、操作範例、限制、常見問題與相關工具連結。
- 台灣郵遞區號查詢 台灣郵遞區號查詢工具，涵蓋全台縣市、鄉鎮市區，快速查詢郵遞區號。
- 台灣行事曆 2025/2026 台灣行事曆，含國定假日、連假、補班日查詢
- 台灣勞健保計算機 2025/2026 台灣勞保、健保、勞退計算機，含完整級距表
- 營業稅逾期利息計算機 計算營業稅滯納金、滯報金、怠報金與滯納利息，依最新稅捐稽徵法規定
- 線上計算機 Clean and beautiful calculator with basic operations, percentage calculations, and keyboard support
- 發票對獎 統一發票對獎工具，輸入發票號碼快速比對中獎號碼。
- 台灣電費計算機 Calculate electricity bill based on Taiwan Power Company tiered rates, supports summer rates
- 附近垃圾車 即時追蹤垃圾車位置！支援新北市，顯示車牌、地址和距離，不再錯過垃圾車
- 台灣所得稅計算機 2024年台灣個人綜合所得稅計算機，支援單身、夫妻合併、夫妻分開申報，自動計算免稅額、扣除額、特別扣除額與應納稅額。
- 澳門職業稅計算機 2024/25年度澳門職業稅計算機，支援累進稅率（0%-12%），自動套用25%一般扣減及30%稅款減免優惠。
- 出貨標籤產生器 免費線上出貨標籤產生器，100x150mm 標準尺寸，適用蝦皮、MOMO、PChome、Coupang 等電商平台。
- 包裹貼紙產生器 電商賣家必備！多種包裹貼紙樣版：物流提醒、退換貨政策、感謝貼紙，可自訂店名、顏色、尺寸。
台灣生活工具
18 種台灣生活實用工具：交通影像、空氣品質、發票對獎、垃圾車、加油站、財務試算等
MediaPipe Demo
Experience real-time AI vision tasks: Face Mesh, Hand Tracking, Pose Detection, and Object Detection.
工安偵測
AI 工業安全偵測系統，使用攝影機即時偵測人員是否在安全區域內，違規時發出警報。
Scoreboard
Two-team scoreboard with timer, fullscreen mode, and theme switching. Perfect for sports and game scoring.
台灣郵遞區號查詢
台灣郵遞區號查詢工具，涵蓋全台縣市、鄉鎮市區，快速查詢郵遞區號。
HTML Canvas 編輯器
線上 Canvas 程式碼預覽工具，方便將 AI 生成的 Canvas 程式碼貼上即時預覽，手機也能用
Swarm Shader Forge
AI 粒子群 shader 工作台：建立高約束 prompt、驗證 function body，並用 Three.js 即時預覽 20,000+ 粒子群。
存證信函產生器
台灣郵局存證信函產生器，支援寄件人、收件人、副本收件人與正式 PDF 輸出，可直接下載列印。
Batch Image Sizer
Batch resize images with watermark support, JPEG quality control, and file size limits. Download as ZIP. Local processing for privacy.
台灣行事曆
2025/2026 台灣行事曆，含國定假日、連假、補班日查詢
台灣勞健保計算機
2025/2026 台灣勞保、健保、勞退計算機，含完整級距表
營業稅逾期利息計算機
計算營業稅滯納金、滯報金、怠報金與滯納利息，依最新稅捐稽徵法規定
香港薪俸稅計算機
免費線上香港薪俸稅計算器，支援累進稅率與標準稅率比較，自動計算各項免稅額，2023/24 年度適用。
Image Color Grading
Batch process image color tones, extract tones from reference images or choose preset filters, supports single/ZIP download
Emoji Picker
Complete emoji collection with one-click copy, perfect for IG, FB, Twitter and other social media
Fancy Text Generator
Convert regular text into cursive, bold, italic and other special artistic fonts for social media
Random Wheel Spinner
Online wheel spinner tool with customizable options, perfect for lucky draws, lunch decisions, and random choices
Dice & Coin Flip 3D
3D dice roller and coin flipper with realistic physics, supports multiple dice and custom sides
Dice & Coin Flip 2D
Classic 2D dice roller and coin flipper, simple and fast, supports multiple dice and custom sides, perfect for board games
Percentage Calculator
Calculate discount amounts, percentage changes, and ratios with multiple calculation modes
Speed Test
Test internet download speed, upload speed, and latency - simple and fast, no installation needed
Team Generator
Enter names for automatic random grouping, perfect for classroom groups, event teams, and gaming squads
Calculator
Clean and beautiful calculator with basic operations, percentage calculations, and keyboard support
Notes
Simple note-taking app to create, edit, and delete notes with automatic local storage
Todo List
Manage daily tasks with filtering, completion tracking, and local storage
Timer
Stopwatch and countdown timer with lap recording, preset times, and end alerts
Base Converter
Convert between decimal, binary, octal, and hexadecimal, displays 32-bit and ASCII
QR Code 產生器
快速產生 QR Code，支援文字、網址、電話、WiFi，可自訂顏色與尺寸。
Password Generator
Generate secure random passwords with customizable length and character types, shows password strength
Drawing Board
Simple drawing tool with multiple colors, brush sizes, eraser and fill functions
Lucky Draw
Animated lottery tool with name import, multi-person draws, slot machine effects for parties and events
Random Pairing
Randomly pair names in twos, supports multiple rounds, optional odd-one-out for event grouping
Gift Exchange
Secret Santa gift exchange tool, ensures no self-draws, supports private viewing and public modes
Serial Generator
Batch generate UUIDs, random codes, serial numbers with custom formats, export to TXT
IP Lookup
Check your public IP, location, ISP provider, query any IP and show on map
Data Masking
Auto-detect and mask sensitive data including names, IDs, phones, emails, credit cards
Email Validator
Check email format validity, supports single or batch validation, detects common errors
Name Romanization
Romanize Chinese names, supports Wade-Giles, Pinyin, Tongyong Pinyin, passport format compliant
English Name Generator
Find the perfect English name based on your Chinese name. Matches by pronunciation and meaning, with popular name suggestions.
World Clock
Display times in major cities worldwide, timezone conversion, custom cities for international meetings
Pomodoro Timer
Focus work technique timer with 25min work + 5min break, task list, custom times, daily stats
3D 番茄鐘
沈浸式 3D 番茄鐘，點擊即可專注。簡單、直覺的生產力工具
Word Counter
Real-time word, character, line, paragraph count with reading time, supports mixed Chinese/English
Text Compare
Compare two texts and highlight additions, deletions, and changes with line-by-line comparison
JSON Formatter
JSON beautify, minify, and validate tool with syntax highlighting and error detection
Base64 Encoder
Base64 encode and decode tool supporting text and images with instant conversion
URL Encoder
URL encode and decode tool for special characters, supports encodeURI and encodeURIComponent
HTML Escape
HTML entity escape tool to convert special characters to HTML entities or reverse decode
Lorem Ipsum Generator
Generate Lorem Ipsum or Chinese placeholder text for design layout testing, specify paragraphs or words
Unit Converter
Multi-functional unit converter for length, weight, area, volume, temperature and more
BMI Calculator
Calculate Body Mass Index with height and weight input, shows health status and recommendations
Markdown Editor
Live preview Markdown editor with common syntax support, toolbar shortcuts, HTML export
Age Calculator
Enter birthday for precise age calculation showing years, months, days, total days, zodiac signs
Date Calculator
Calculate days between two dates, or add/subtract days from a date, supports business days
Tip Calculator
Calculate tip amounts with support for multi-person bill splitting
Loan Calculator
Mortgage, car, and personal loan calculator for monthly payments, total interest, and principal ratio
Color Picker
Visual color picker with HEX, RGB, HSL format conversion and one-click color code copy
Timestamp Converter
Convert between Unix Timestamp and datetime, supports seconds and milliseconds, shows current timestamp
Aspect Ratio Calculator
Calculate image, screen, video dimension ratios with locked ratio scaling and common presets
Gradient Generator
Visual CSS gradient editor supporting linear and radial gradients with one-click code copy
Box Shadow Generator
Visual CSS shadow editor with live preview and one-click code copy
Breathing Exercise
Guided breathing exercises with multiple breathing patterns for relaxation, stress relief, better sleep
Image Compressor
Quickly compress image file size with adjustable quality while maintaining image clarity
Image Resize
Adjust image dimensions with custom width/height or locked aspect ratio scaling, common preset sizes
Color Palette
Auto-generate harmonious color schemes, press Space for random colors, lock favorite colors
Sleep Calculator
Calculate optimal wake or sleep time based on sleep cycles for feeling well-rested
Whiteboard
Draw and take notes with pen, line, rectangle, circle and other tools
Countdown
Set important dates to track countdown days, perfect for exams, birthdays, anniversaries
Morse Code
Morse code encoder and decoder tool with text conversion and sound playback
Flashcards
Create your own flashcards, flip to learn, manage multiple card sets
Habit Tracker
Track daily habit completion, build good habits, visual progress statistics
Text to Speech
Convert text to spoken voice with multiple language and speed options
Regex Tester
Online regular expression tester with live match highlighting and common examples
Stopwatch
Precise stopwatch with lap recording, fastest/slowest marking, essential for sports timing
Screen Ruler
Screen pixel measurement tool supporting horizontal and vertical measurement, essential for designers
Text to Binary
Convert text to binary code and vice versa with character reference table
Font Preview
Preview system font effects, adjust size, color, style, choose the best font
Social Character Counter
Check character limits for Twitter, Instagram, Facebook and other social platforms
Noise Generator
White, pink, and brown noise generator for focus, relaxation, and sleep
Periodic Table
Interactive periodic table, click to view element details, essential for chemistry learning
發票對獎
統一發票對獎工具，輸入發票號碼快速比對中獎號碼。
Moon Phase
View today's moon phase and lunar age, plus monthly moon phase calendar for astronomy fans
條碼產生器
產生 Code 128、EAN-13 等多種條碼格式，可下載 PNG 或 SVG。
Salary Calculator
Calculate Taiwan labor/health insurance costs, net salary, bonus and overtime pay
Rent Split Calculator
Fair rent splitting by room size, enter room dimensions for automatic calculation
Stock Average Calculator
Calculate stock average cost after adding shares, plan buying strategy and break-even price
Calorie Calculator
Calculate TDEE daily energy expenditure and BMR basal metabolic rate for weight loss or muscle gain
Electricity Calculator
Calculate electricity bill based on Taiwan Power Company tiered rates, supports summer rates
Meme Generator
Upload image and add text to quickly create funny memes with customizable font colors
Credit Card Compare
Enter spending habits to find the best credit card, calculate rewards for each card
Cron Generator
Visual Crontab schedule expression builder with common templates and next run time preview
Flexbox Playground
Interactive CSS Flexbox learning with live property preview and CSS code generation
Mock API Generator
Quickly generate mock JSON data with multiple data types, essential for frontend development testing
Emoji Search
Quick search and copy emoji with Chinese/English search support, browse by category
附近垃圾車
即時追蹤垃圾車位置！支援新北市，顯示車牌、地址和距離，不再錯過垃圾車
COCO-SSD Tracker
COCO-SSD 即時物件偵測，辨識 80 種常見物體如人、車、動物等
球體軌跡追蹤器
上傳影片或明確開啟 Webcam，以 MediaPipe EfficientDet 在瀏覽器本機標記球體並畫出移動軌跡
眼動追蹤實驗室
用 Webcam 完成九點視線校正，在瀏覽器本機控制視線游標並挑戰停留操作
Remote Sensor
Stream mobile sensor data (accelerometer, gyroscope, orientation) to desktop via P2P WebRTC connection. Real-time 3D phone visualization.
雙向推論 GPT
雙 AI 角色協作：ChatGPT 生成解決方案，Consultant 自我檢查與改進，幫助你深度思考問題
自動辯論 GPT
選擇一個題目，AI 自動進行正反方辯論，幫助你看見問題的多面向觀點
台灣所得稅計算機
2024年台灣個人綜合所得稅計算機，支援單身、夫妻合併、夫妻分開申報，自動計算免稅額、扣除額、特別扣除額與應納稅額。
澳門職業稅計算機
2024/25年度澳門職業稅計算機，支援累進稅率（0%-12%），自動套用25%一般扣減及30%稅款減免優惠。
出貨標籤產生器
免費線上出貨標籤產生器，100x150mm 標準尺寸，適用蝦皮、MOMO、PChome、Coupang 等電商平台。
包裹貼紙產生器
電商賣家必備！多種包裹貼紙樣版：物流提醒、退換貨政策、感謝貼紙，可自訂店名、顏色、尺寸。
電商小工具
電商賣家必備工具集：出貨標籤、包裹貼紙、條碼生成、發票對獎、郵遞區號查詢，支援蝦皮、MOMO、PChome。
關於實用工具
計算類工具：從基本計算機到複雜的財務計算、BMI 計算、年齡計算、日期計算等，滿足各種數學運算需求。
轉換類工具：單位轉換器支援長度、重量、溫度、貨幣等多種單位；進制轉換器可在二進制、十進制、十六進制間轉換；色彩轉換器支援 HEX、RGB、HSL 等格式。
產生器工具：QR Code 產生器、密碼產生器、UUID 產生器、Lorem Ipsum 假文產生器等，一鍵生成所需內容。
開發者工具：JSON 格式化、Base64 編碼解碼、URL 編碼解碼、正規表達式測試器等，加速開發流程。
所有工具皆可在瀏覽器中直接使用，無需下載安裝，完全免費且支援行動裝置。資料在本地處理，確保隱私安全。