Scoreboard Web (board.onl.jp)
A web app for managing and displaying scores in sports or games in the browser. Enter team names and scores to record match points in real time.
Browser Info Web (browser.onl.jp)
A web tool to display information about your current browser, version, OS, and screen resolution. Useful for verifying browser compatibility and gathering details for support inquiries.
Calculator Web (calc.onl.jp)
A simple calculator web app that runs in the browser. Supports basic arithmetic operations and is easily accessible from smartphones, tablets, and PCs.
Date Calculator Web (calcdate.onl.jp)
A web tool to calculate the difference between two dates (in days, weeks, months, or years) or find the date after a specified number of days. Handy for checking days until birthdays, anniversaries, and deadlines.
Calendar Web (calendar.onl.jp)
A simple calendar web app that runs in the browser. Supports monthly and weekly views, making it easy to check schedules and track dates.
Compass Web (compass.onl.jp)
A digital compass web tool that uses your smartphone or tablet's orientation sensor to display the current direction in the browser. Check your bearings without installing any app.
Counter Web (count.onl.jp)
A simple web counter that supports count-up and count-down with just a button press. Useful for inventory tracking, headcounts, vote tallying, and many other purposes.
Anniversary Web (date.onl.jp)
A web app to register anniversaries such as birthdays and wedding anniversaries, then manage countdowns and days elapsed. Always keep track of your important special days.
Digital Clock (digital.onl.jp)
A web app that displays a large, easy-to-read digital clock in the browser. Ideal for displaying the time on screen during presentations, classes, and events, with full-screen support.
Excel to HTML Converter (excel.onl.jp)
A web tool that converts Excel files to HTML tables simply by uploading them. Output Excel data in a format ready to embed directly in web pages.
Vision Check Web (eye.onl.jp)
A web tool for a quick vision self-check in the browser using Landolt C optotype symbols. Useful as a preliminary check before an eye exam.
FIRE Calculator (fire.onl.jp)
A web tool to calculate the assets and time needed to achieve FIRE (Financial Independence, Retire Early) by entering current assets, monthly cash flow, and target amount. Simulations based on the 4% rule.
