Normalize List Separator - Convert Mixed Delimiters to a Single Separator

What Is a List Separator Normalizer?

The Normalize List Separator tool lets you clean up messy lists by converting all mixed delimiters into a single consistent separator. If you have a list where items are separated by various characters such as commas, semicolons, periods, or inconsistent whitespace, this tool will unify them into a clean, predictable format.

How to Normalize List Separators

Paste your list with mixed separators into the Input List text area.
Choose Match by Regex to detect multiple separator patterns, or Match by String for a single delimiter.
Enter the pattern or character to match in the Matching Separator field.
Set the Normalized Delimiter to your desired output separator.
Toggle Trim items and Remove empty items as needed.
The normalized list appears instantly in the output area.

Common Use Cases

Clean up data copied from different sources where separators are inconsistent.
Convert mixed-delimiter lists into clean comma-separated or line-separated formats.
Prepare data for import into spreadsheets or databases that require uniform formatting.
Standardize user-generated content where separators vary between entries.

Regex Examples for Matching Separators

/\s+/ – matches all whitespace sequences (spaces, tabs, newlines).
/[,;]/ – matches commas and semicolons.
/\s*[,.]\s*/ – matches commas or dots with optional surrounding whitespace.
/[;,.\s]+/ – matches any mix of semicolons, commas, dots, and whitespace.

Frequently Asked Questions

What is the difference between "Match by Regex" and "Match by String"?

Match by String looks for an exact character or sequence to split your list items. Match by Regex lets you define a pattern using regular expressions, which is useful when your list contains multiple different separator characters or complex patterns.

What should I enter in the Matching Separator field for regex mode?

Enter a valid regular expression pattern without the surrounding slashes. For example, use [;,.] to match semicolons, commas, or periods.

Will this tool modify my original data?

No, all processing happens entirely in your browser. Your original list is never sent to any server, and the tool never modifies your input directly.

What does "Trim items" do?

When enabled, leading and trailing whitespace is removed from each list item after splitting. This prevents accidental spaces from appearing around your normalized delimiter.

What does "Remove empty items" do?

When enabled, any empty items resulting from the split operation are discarded from the final output. This is useful when consecutive separators create blank entries.