drawDB
Free and open-source online database diagram editor and SQL generator. Design tables and relationships with drag-and-drop, then export DDL for MySQL, PostgreSQL, SQLite, MariaDB, or SQL Server. No sign-up required.
Account Balance Manager (bank.onl.jp)
A web app to centrally manage balances across multiple bank accounts in the browser. Enter account names and balances to get a simple overview of your total assets.
Bitcoin (bitcoin.onl.jp)
A web tool to check real-time Bitcoin (BTC) price charts. Displays prices in Japanese Yen and US Dollars, letting you monitor cryptocurrency price movements.
BMI Calculator (bmi.onl.jp)
A web tool to calculate BMI (Body Mass Index) from height and weight and determine obesity level. Also displays a guide to ideal weight for health management.
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.
Camera Share Web (camera.onl.jp)
A web app to share real-time camera footage from a smartphone or PC through the browser. Start a video feed instantly just by sharing a URL.
Trading Card Creator (card.onl.jp)
A web app to design and create original trading cards in the browser. Upload images and add text to produce unique cards for personal or hobby use.
Trading Card Battle Web (cardgame.onl.jp)
A web game to battle using original cards created with the Trading Card Creator tool. Play against friends or challenge an AI opponent in your browser.
