Password Generator (www.oh-benri-tools.com)
An online tool for generating large numbers of random passwords. Individually configure uppercase letters, lowercase letters, numbers, and symbols, and adjust length and count with sliders. Bulk download as a text file is also available.
Playing Cards Chain Game
A browser game where you select from 4 cards on the table cards that share the same number or suit as the previous one, aiming to select all 52 cards. Includes a high score display and card checklist.
Pomodoro Timer (www.oh-benri-tools.com)
A productivity timer for practicing the Pomodoro Technique. Freely configure work and break durations, with alarm sound notifications at each transition. Can also be used as an interval timer.
QR Code Generator (www.oh-benri-tools.com)
An online tool for generating QR codes from text in real time. Adjust size and error correction level (L/M/Q/H) with a slider, and save the generated QR code as an image.
Regex Checker (www.oh-benri-tools.com)
An online tool for testing JavaScript regular expression patterns in real time. Highlights matched portions and supports i/g/m flag toggling, with all processing done in the browser.
Repeat Timer (www.oh-benri-tools.com)
An online timer that automatically restarts when it reaches zero. Ideal for interval training or recurring task breaks, with alarm sound and fullscreen display support.
RGBA to RGB Converter (www.oh-benri-tools.com)
An online tool that calculates the final RGB value by combining an RGBA (transparent color) and a background RGB color. Useful for previewing how a transparent color will actually appear.
Simple Slide Creator (www.oh-benri-tools.com)
An online tool for creating simple slides in a browser. Supports adding, moving, and formatting text, as well as fullscreen display and downloading as an image. Input data is not sent to the server.
Stopwatch (www.oh-benri-tools.com)
An online stopwatch for use in a browser. Supports start/stop with the spacebar, lap timing, and fullscreen display.
Text / File Diff (www.oh-benri-tools.com)
An online tool for comparing two texts or files and displaying the differences clearly. Supports drag-and-drop file input, split view, and syntax highlighting.
Time Formats for Copy (www.oh-benri-tools.com)
An online tool that displays the current date and time in over 8 formats — including YYYY/MM/DD, UNIX timestamp, and ISO 8601 — and lets you copy them with a single click. You can also specify any custom date and time.
Toilet Sound Generator
An online tool that plays a toilet flushing sound when a button is pressed. Adjust the volume with a slider and includes a timer function.
