Tools

Browse all tools registerd in this site.

Text processing

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.

Text processing

Whitespace Converter (www.piliapp.com)

An online tool to convert whitespace characters and line breaks in text. Transform tabs, spaces, and newlines for use in code, HTML, and text processing tasks.

Unit conversion

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.

Utilities

Website Color Blindness Simulator (toolpods.io)

Simulate how images or web content appear to users with various types of color blindness including protanopia, deuteranopia, and tritanopia.

File conversion

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.

Media

Voice Recorder Web (voice.onl.jp)

A voice recorder web app that lets you record, play back, and download audio using your browser's microphone. Perfect for capturing meeting notes and ideas without installing any app.

Measurement

Vision Check Web (eye.onl.jp)

A web tool for a quick vision self-check in the browser using Landolt C optotype symbols. Useful as a preliminary check before an eye exam.

Image editing

Video Player with Still Image (atl2.net)

A web tool for playing videos overlaid on a background image. Designed for exhibition and demo presentations, it supports drag-and-drop upload of background images and videos, with five positioning options for the video overlay.

Image editing

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.

Validation

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.

Code generation

UUID Generator (toolpods.io)

Generate UUIDs (Universally Unique Identifiers). Create multiple v4 UUIDs at once.

Developer tools

UUID / GUID Generator (web-toolbox.dev)

Free tool for randomly generating UUID (v4) or GUID values. Generate multiple UUIDs at once, useful for database design and test data creation.

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