Replace List Items - Find and Replace List Items Online

What Is a Replace List Items Tool?

A Replace List Items tool is a text processing utility that lets you find and replace specific items within a list. Unlike simple find-and-replace in a text editor, this tool operates on individual list items, allowing you to replace entire entries rather than just substrings. You can replace specific items with new values or use regular expressions for complex pattern-based replacements, making it ideal for data cleaning, text transformation, and batch updates.

The tool splits your input using a configurable separator, processes each item through your chosen replacement rules, and joins the results back together. Optional settings let you trim whitespace, remove empty items, and control the output separator independently from the input separator. All processing happens entirely in your browser for complete data privacy.

How to Use the List Item Replacer

Follow these steps to replace items in your list:

Enter Your List: Paste your list items into the input area separated by a consistent delimiter.
Choose Separator Mode: Select a character or regex separator that matches your input format.
Set Input and Output Separators: Define how items are split and how they should be joined in the output.
Choose Replacement Mode: Select between exact item replacement or regex-based replacement.
Configure Replacement: Enter the old and new values, or the regex pattern and replacement string.
Get Updated List: The output updates automatically. Copy or download the result.

Understanding the Replacement Modes

Specific Item Replacement

In this mode, you specify an exact item value to find and its replacement. Only items that match the old value exactly (after trimming if enabled) will be replaced. This is useful for correcting specific entries or standardizing values across a dataset.

Regex Replacement

Regex replacement applies a regular expression pattern to each item and replaces matches with your replacement string. You can use capture groups ($1, $2, etc.) to reference parts of the match. This mode handles complex transformations like changing formats, extracting portions of items, or applying conditional replacements.

Frequently Asked Questions

What is the difference between input and output separators?

The input separator defines how your original list is split into items. The output separator defines how the processed items are joined back together. You can use different separators, for example, splitting by newline and joining by comma.

Does the replacement modify the original item or the whole item?

Replacement operates on each individual item. In specific mode, the entire item must match the old value. In regex mode, the pattern is applied within each item, allowing partial replacements.

Can I use regex capture groups in replacements?

Yes. In regex mode, you can use $1, $2, etc. to reference captured groups in your replacement string, allowing advanced text transformations.

Is my data secure?

Yes. All processing happens entirely in your browser using JavaScript. No data is sent to any server.

What separator options are available?

You can use any character as a separator, including commas, newlines (\n), tabs, or custom symbols. A regex separator option is also available for advanced splitting needs.

Can I remove empty items during processing?

Yes. The "Remove Empty Items" option filters out blank entries before processing, and the "Trim Items" option strips leading/trailing whitespace from each item for cleaner results.