Powerful Tools for Everyday Tasks

UndefinedTools provides a suite of elegant, easy-to-use web tools designed to simplify your daily workflow.

Our Tools

Discover our collection of elegant tools that help you accomplish more in less time.

Time between dates

Tool for calculating time between dates

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Fortune wheel

Enter options and spin

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Unit Converter

Convert between different units of measurement with precision and ease

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Words Counter

Analyze text with comprehensive statistics including word count, reading time, and keyword density

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Our Dev Tools

Discover our collection of elegant tools that help you accomplish more in less time.

JSON Formatter

Format and beautify JSON data with syntax highlighting and error detection

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XML Formatter

Format and beautify XML data with syntax highlighting and error detection

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URL Encoder/Decoder

Encode and decode URLs to handle special characters safely in web applications

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Our Design Tools

Discover our collection of elegant tools that help you accomplish more in less time.

Color Palette Generator

Generate beautiful color palettes with various color harmony methods

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Tints Generator

Generate color palettes with tints and shades from any base color

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Latest Blog Posts

Stay updated with our latest insights, tutorials, and tips.

Aug 07, 2025•2 min read

The Making of JSON: A Personal Story of Simplicity

The human story of how Douglas Crockford’s quest for simplicity in data structures transformed the way the web talks to itself.

Related Tools:

JSON Formatter

Aug 05, 2025•3 min read

From Ancient Cubits to Digital Calipers: The Changing Face of Length Measurement

Journey through time to discover how different cultures defined distance, and how unit converters now unite these systems with a click.

Related Tools:

Unit Converter

Aug 04, 2025•4 min read

The Color Codes: Tracing the Evolution of Web Color Formats

Explore the fascinating history behind RGB, HEX, HSL, and OKLCH color representations, and how modern palette generators have changed the way designers and developers use color on the web.

Related Tools:

Color Palette Generator Tints Generator

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