List Utility

Need to Compare Three Lists Side-by-Side for visual analysis of multiple datasets? This tool displays your lists in parallel columns with color-coded matching, making it easy to spot similarities and…

Need to Compare Three Lists for Differences and analyze complex overlaps between multiple datasets? This advanced tool handles three-way comparisons with Venn diagram-style analysis, showing you exactly which items appear…

Need to Compare Two Lists for Differences and spot what’s changed between versions? This browser-based tool analyzes your text lists side-by-side and highlights exactly what’s different. Simply paste both lists,…

Looking for a simple way to Extract a Sublist by Range from your text lists? This browser-based tool lets you pull specific sections from longer lists without any downloads or…

Need to combine all your list items into one result? This Reduce a List to a Single Value tool implements the powerful reduce operation from functional programming. Perfect for calculating…

Want to transform your list items programmatically? This Apply Custom Function to List Items tool lets you write JavaScript functions that process each item individually. Perfect for data transformation, text…

Need to extract the tail of a list? This Get the CDR Value of a List tool implements the classic functional programming operation that returns everything except the first element(s).…

Join List Items is a versatile text combination tool that merges separate list entries into a single formatted string using customizable separators and joining styles. Whether you need to create…

Slice a List is a precise data extraction tool that selects specific portions from your lists using flexible indexing and range options. Whether you need the first few items, a…

Set List Length is a precise list management tool that adjusts the number of items in your lists to meet specific requirements. Whether you need to truncate long lists, extend…