免费在线实用工具：二维码生成器、计时器和设备测试
生成和扫描二维码与条形码，随机数、掷骰子、转盘抽奖，计时器，以及键盘、麦克风和摄像头测试。
12 款工具
二维码生成器为链接、Wi-Fi、联系人、邮件、短信、位置和活动生成二维码。可自定义颜色、Logo 和样式，下载 PNG、JPG 或 SVG。随机数生成器在任意范围内生成随机数：单个或多个，可重复或不重复，支持小数、彩票号码、掷骰子、抛硬币和加权抽取。Barcode GeneratorCreate Code 128, EAN-13, UPC-A, Code 39, ITF-14 and more barcodes. Download PNG or print-ready SVG, one at a tCountdown TimerSet a countdown in hours, minutes and seconds with an alarm sound. Works in the background and full screen.在线掷骰子在线掷虚拟骰子（任意数量的d4、d6、d8、d10、d12、d20或d100）支持加值、优势劣势和掷骰记录。键盘测试在线测试键盘上的每一个按键。按下按键即会点亮，显示最后按下的键及其代码，并可查看已测试的按键数量。Microphone TestSee your microphone level live, check the sound with a frequency view and record a 10-second clip to hear your在线秒表免费在线秒表，支持计圈、键盘控制和全屏模式，还内置倒计时器和番茄钟。Pomodoro TimerWork in focused 25-minute sessions with 5-minute breaks and a long break every four sessions. Custom lengths aQR Code ScannerScan QR codes from a photo, screenshot or your camera. Reads links, Wi-Fi passwords, contacts and text instantSpin the WheelAdd names or options, spin the wheel and let it pick a fair random winner. Share your wheel with a link.Webcam TestCheck that your webcam works before a call: live preview, resolution, frame rate, camera switch and a test pho