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.
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.
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.
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.
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.
Naming Convention Converter (www.oh-benri-tools.com)
An online tool for converting between programming naming conventions such as camelCase, PascalCase, snake_case, and kebab-case. Input text is instantly converted to all formats.
Metronome (www.oh-benri-tools.com)
An online metronome for use in a browser. Adjust tempo with a pendulum or slider, with support for beat and volume settings and spacebar operation. Fullscreen display is also available.
Length Converter (www.oh-benri-tools.com)
An online tool for converting length units. Supports numerous units including km, cm, mm, inches, feet, miles, and light years, with customizable significant figures and rounding methods.
Kanji Magnifier (www.oh-benri-tools.com)
An online tool for displaying complex kanji characters in a large font. Text is displayed enlarged in real time as you type, with slider-adjustable size. Useful for checking the strokes of difficult kanji.
Kaki-no-Tane Ratio Simulator
An online tool for simulating the ratio of Kaki-no-Tane (rice crackers) to peanuts. Press buttons to adjust input amounts and check ratios in real time. Includes a feature to download the results as an image.
JSON Formatter (www.oh-benri-tools.com)
An online tool for formatting JSON data. Supports drag-and-drop file input and displays results in real time with line numbers and syntax highlighting. All processing is done in the browser.
Image Mosaic / Blur (www.oh-benri-tools.com)
An online tool for applying mosaic or blur effects to any area of an image by dragging. Customize the mosaic coarseness and fill color, with all processing done in the browser.
