Area Converter (www.oh-benri-tools.com)
An online tool for converting area units. Supports numerous units including square meters, square kilometers, and tatami mats, with customizable significant figures and rounding methods. Also supports area comparisons with familiar landmarks.
Base64 Encode / Decode (www.oh-benri-tools.com)
An online tool for encoding and decoding text or files in Base64 format. Supports drag-and-drop file input, with a toggle to switch conversion direction. All processing is done in the browser.
Binary (Hex) Editor (www.oh-benri-tools.com)
An online tool for viewing and editing binary files in a browser. Load files by drag-and-drop, with support for byte addition, deletion, and hexadecimal editing. All processing is done in the browser.
Bingo Card (www.oh-benri-tools.com)
An online tool for generating and using bingo cards in a browser. Click card numbers to mark them, and pair with the Bingo Game tool to play bingo.
Bingo Game (www.oh-benri-tools.com)
An online tool for conducting bingo game draws in a browser. Numbers are shuffled when you start, and drawn numbers are displayed. Pairs with the Bingo Card tool to enjoy the full game.
BMI Calculator (www.oh-benri-tools.com)
An online tool that calculates BMI by dragging sliders for height and weight. Displays body type classification in real time, with an option to download the result as an image.
Bubble Wrap Popper
A simulator game where you pop virtual bubble wrap by clicking or dragging. Displays a count of popped bubbles, with fullscreen display and volume adjustment support.
Calculator (www.oh-benri-tools.com)
An online calculator for performing arithmetic calculations in a browser. Supports mouse or keyboard input, and multiple calculators can be used simultaneously. Also supports automatic sum and average calculation across multiple instances.
Calendar (www.oh-benri-tools.com)
An online calendar for viewing monthly or yearly views. Supports Japanese public holidays, customizable week start day, and fullscreen display. Choose from 1-month, 2-month, or yearly views.
Character Counter (www.oh-benri-tools.com)
An online tool for counting characters in text. Supports drag-and-drop file input and multiple counting methods, including handling of newlines and double-byte characters. Includes conversion to manuscript page equivalent.
Clock (www.oh-benri-tools.com)
An online clock that displays the current time. Shows accurate time and supports display format switching and fullscreen view.
Color Code Converter (www.oh-benri-tools.com)
An online tool for converting between RGB (decimal), hexadecimal, RGBA, and CSS color formats. Instantly displays results in multiple formats in real time after input.
