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.
Distance Measurement Web (measure.onl.jp)
A web tool to measure the distance between two points in real time using GPS in the browser. Useful for tracking travel distance during walks and exercise.
Division Challenge (divided.onl.jp)
A math practice web app where you solve division problems within a time limit. Great for improving children's arithmetic skills or as a brain workout for adults, with score tracking.
Event Memo (evtmemo.onl.jp)
A web app to register and manage event information such as concerts and matches with date, location, and notes. Keep track of your favorite events without forgetting.
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.
Exchange Rate Chart (kawase.onl.jp)
A web tool to check real-time exchange rate charts for major currencies including JPY, USD, and EUR. Useful as a reference for currency exchange, overseas travel, and investing.
File Web (file.onl.jp)
A web app for uploading and sharing files directly in the browser. Share files effortlessly by simply sending a URL — no account registration required.
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.
Font Trial Web (pen.onl.jp)
A web tool to try out and preview text in various fonts. Useful as a reference when choosing fonts or checking character designs.
Four Pillars of Destiny (destiny.onl.jp)
A web app for fortune-telling based on the Four Pillars of Destiny (Shichusuimei / Ba-Zi) using birth date and time. Easily check personality and fortune through this traditional East Asian divination method.
HTML Entities (entity.onl.jp)
A web tool to look up and search HTML entities (such as &, <, etc.). Useful for converting characters to HTML entities and investigating special characters.
Image Analyzer Web (image.onl.jp)
A web tool that uses AI to analyze uploaded images and describe their contents as text. Also useful for OCR and recognizing text within images.
