Which characters does this treat as separators?

Comma, semicolon, newline, and tab, along with any whitespace immediately surrounding them, are all treated as separator occurrences and collapsed during the split.

How is this different from List Separator Changer?

List Separator Changer assumes the input uses one consistent separator kind and lets you pick which one to parse with. This tool assumes the input is inconsistent, mixing several separator kinds and stray whitespace, and cleans all of that up in a single pass.

Are blank or whitespace-only items kept?

No, every resulting item is trimmed and any that become empty after trimming are dropped, so accidental double separators or trailing commas don't leave empty entries in the output.

Can I add more separator characters it should recognize?

Not currently, the recognized set (comma, semicolon, newline, tab) is fixed and covers the vast majority of real-world messy lists. If your source uses a different single consistent delimiter, List Separator Changer is more flexible.

List Separator Normalizer - Clean Up Mixed-Delimiter Lists

Overview

Introduction

Lists copied from emails, spreadsheets, or chat messages often mix separator styles inconsistently, a few items comma-separated on one line, the rest each on their own line, with random extra spaces thrown in.

This tool cleans all of that up in a single pass: it recognizes several separator characters at once, trims stray whitespace, drops empty entries, and rejoins everything with one consistent separator you choose.

What Is List Separator Normalizer?

A list-cleanup tool that treats commas, semicolons, newlines, and tabs (plus any whitespace around them) as equivalent separator occurrences, rather than requiring you to know or pick a single consistent delimiter in advance.

It's the tool to reach for when a list's formatting is inconsistent or unknown, as opposed to List Separator Changer, which expects one known, consistent input delimiter.

How List Separator Normalizer Works

The input is split using a regular expression that matches any of `,` `;` `\n` `\t`, along with any surrounding whitespace, as a single separator occurrence.

Each resulting item is trimmed of leading/trailing whitespace, empty items are dropped, then the clean items are rejoined using your chosen output separator.

When To Use List Separator Normalizer

Use it on a list pasted from an email or document where some items were on their own line and others were comma-separated on the same line.

It's a good first step before feeding a messy list into a stricter tool that expects one consistent separator.

Often used alongside List Separator Changer, List Separator Remover and List Item Joiner.

Features

Advantages

Handles multiple separator kinds in the same input without you needing to know which ones are present.
Trims whitespace and drops blank entries automatically, producing a genuinely clean result.
Outputs with your choice of a single consistent separator, ready for further processing.

Limitations

Only recognizes comma, semicolon, newline, and tab as separators; a list delimited by something else (like a pipe) needs List Separator Changer instead.
Because it drops blank items, it can't be used to preserve intentional empty entries in a list's structure.

Examples

Mixed commas and newlines

Input

apples, bananas
cherries,  dates

grapes

Output

apples
bananas
cherries
dates
grapes

Commas, newlines, and the extra whitespace around "dates" are all treated as separators; the blank line is dropped, and the output separator chosen here is newline.

Semicolons and tabs together

Input

a;	b;c

Output

a, b, c

The semicolon-tab combination and the lone semicolon are both recognized as separators; the output separator chosen here is comma, which joins with ", ".

Best Practices & Notes

Best Practices

Run this first whenever you're not sure how consistently a pasted list is delimited, then use a more specific tool on the cleaned result.
Pick newline as the output separator if you plan to feed the result into a newline-only tool like Line Prefix Adder afterward.

Developer Notes

Splits with the regular expression `/\s*[,;\n\t]\s*/`, which consumes a separator character along with any surrounding whitespace in one match, then maps each result through `.trim()` and filters out empty strings before rejoining with the shared `joinListItems` helper.

List Separator Normalizer Use Cases

Cleaning up a list pasted from an email that mixes commas and line breaks
Normalizing a spreadsheet column export that has inconsistent trailing whitespace
Preparing a messy list for import into a tool that requires one strict delimiter

Common Mistakes

Assuming this preserves blank/empty items, it deliberately drops them as part of cleanup.
Using this on a list delimited by a character outside the fixed set (comma, semicolon, newline, tab), which won't be recognized as a separator.

Tips

If your list uses a single unusual delimiter consistently, List Separator Changer will be more predictable than this tool's fixed recognized set.
Follow up with List Item Prefix Adder or List to Markdown List Converter once the list is cleaned.

List Separator Normalizer