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.
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.
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.
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.
Calligraphy Web (font.onl.jp)
A web tool to display and output text in a Japanese calligraphy (mouhitsu) brush font style. Useful for creating templates for noshi envelopes, New Year's cards, and calligraphy practice.
Sound Level Meter (geq.onl.jp)
A web tool to measure ambient sound levels in real time using your microphone. Displays decibel readings for checking noise levels and verifying recording environments.
Location Share Web (gps.onl.jp)
A web app to share your current GPS location with others in real time. Send and receive location information simply by sharing a URL.
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.
jQuery Mobile Web (jqm.onl.jp)
A web reference tool for browsing the jQuery Mobile API documentation in the browser. Useful for verifying component specifications and checking sample code.
JavaScript Minifier (jsmin.onl.jp)
A web tool to minify and compress JavaScript code in the browser. Removes whitespace and comments to reduce file size and improve website loading speed.
