🎮 趣味工具Fun & Games
幸运大转盘Spin the Wheel (Random Picker)
自定义选项的在线幸运转盘：抽奖、吃什么、谁请客，一转决定。Custom spinning wheel to pick a random option — raffles, what to eat, who pays.
随机点名/抽奖器Random Name Picker
粘贴名单，随机抽取一个或多个名字，不重复，适合课堂点名、年会抽奖。Paste a list and randomly draw one or more names without repeats — for classes and raffles.
打字速度测试Typing Speed Test
在线测试打字速度（WPM/每分钟字数）和准确率，支持中英文。Test your typing speed (WPM / characters per minute) and accuracy, English or Chinese.
反应速度测试Reaction Time Test
测试你的反应速度：屏幕变绿时尽快点击，统计平均反应时间（毫秒）。Test your reaction time: click as soon as the box turns green; get your average in ms.
手速测试（CPS）Click Speed Test (CPS)
测试你每秒能点击多少次鼠标（CPS），可选 5/10/30 秒。How many clicks per second can you do? 5, 10 or 30-second CPS test.
随机分组器Random Team Generator
把名单随机分成若干组，可按组数或每组人数分组，适合活动、课堂和比赛。Randomly split a list of names into teams — by number of teams or team size.
彩票号码随机生成Lottery Number Generator
随机生成双色球、大乐透、Powerball、Mega Millions、欧洲百万号码，或自定义规则。仅供娱乐。Random numbers for lotteries (双色球, 大乐透, Powerball, Mega Millions, EuroMillions) or custom rules. For fun.
在线计数器Online Tally Counter
在线点击计数器，支持多个计数项、加减、键盘快捷键，自动保存。Online click/tally counter with multiple counters, +/−, keyboard shortcuts and auto-save.
在线钢琴Online Piano
在浏览器中弹钢琴：鼠标点击、触屏或电脑键盘（Z 行 + S 行为低八度，Q 行 + 数字行为高八度，共 24 键）演奏两个八度，支持多种音色。Play a two-octave piano in your browser with mouse, touch or computer keyboard (Z row + S row = lower octave, Q row + number row = upper octave, all 24 keys), several tones.
在线节拍器Online Metronome
可调速度（20–300 BPM）、拍号和重音的在线节拍器，带视觉节拍指示和点击测速（Tap Tempo）。Online metronome with adjustable tempo (20–300 BPM), time signature and accent, visual beat indicator and tap tempo.
在线音频发生器（频率声音）Online Tone Generator
生成指定频率（1–20000 Hz）的正弦波、方波、三角波、锯齿波声音，可用于调音、测试耳机和听力。Generate a tone at any frequency (1–20000 Hz) with sine, square, triangle or sawtooth waves — for tuning and audio tests.
白噪音生成器（助眠/专注）White Noise Generator
在线播放白噪音、粉红噪音、棕色噪音，帮助睡眠、专注和屏蔽环境噪声，可设定时关闭。Play white, pink or brown noise for sleep, focus and masking background sound, with a sleep timer.
井字棋（人机对战）Tic-Tac-Toe vs Computer
经典井字棋：与电脑（简单/不可战胜）或好友对战，记录胜负比分。Classic tic-tac-toe against the computer (easy or unbeatable) or a friend, with a scoreboard.
2048 小游戏2048 Game
经典 2048 数字合并游戏：用方向键或手机滑动合并相同数字，挑战 2048，自动保存最高分。The classic 2048 puzzle: slide with arrow keys or swipes to merge tiles and reach 2048; best score saved.
在线画板Online Drawing Board
简单好用的在线画板：画笔、橡皮擦、颜色、粗细、撤销、清空，支持触屏，可下载 PNG。A simple online drawing board with brush, eraser, colors, sizes, undo and clear; touch-friendly, save as PNG.
屏幕坏点检测Dead Pixel Test
全屏显示纯红、绿、蓝、白、黑等颜色，帮助检测显示器和手机屏幕的坏点、亮点和漏光。Show full-screen solid colors (red, green, blue, white, black…) to spot dead or stuck pixels and backlight bleed.