UUID Validator (web-toolbox.dev)
Free tool for validating whether a UUID is in the correct format. Also identifies the UUID version, useful for API debugging and data validation.
Video Frame Extractor (web-toolbox.dev)
Free tool for extracting specific frames from a video file as images. All processing is done in the browser, so video data is never sent to external servers.
WebP Converter (web-toolbox.dev)
Free tool for converting image files to WebP format in the browser. Supports conversion from PNG, JPG, and other formats with quality adjustment to generate lightweight images.
Word Counter (web-toolbox.dev)
Free tool for real-time counting of words, characters, sentences, and more in English text. Useful for checking character limits in English writing and SEO content.
XML Formatter (web-toolbox.dev)
Free tool for formatting and minifying XML text. Format with unified indentation for readability or strip newlines and spaces to minify. Also detects syntax errors.
YAML to JSON (web-toolbox.dev)
Free tool for converting YAML data to JSON format. Useful for config file format conversion and data transformation when integrating with APIs.
YouTube Thumbnail Downloader (web-toolbox.dev)
Free tool for downloading YouTube video thumbnails by entering the video URL. Download thumbnails in multiple sizes including maximum resolution and high quality.
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.
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.
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.
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.
Weight Converter (www.oh-benri-tools.com)
An online tool for converting weight units. Results in multiple units are displayed instantly after input, with customizable significant figures and rounding methods.
