Kwebby's Comma Separating Tool turns a list with one item per line into one comma separated line, and turns a delimited line back into a list. Paste "1234", "5678" and "9012" on three lines and the output reads "1234, 5678, 9012". Pick another delimiter, trim spaces, drop blank lines or wrap every item in quotes, and copy the result. This guide covers each option, the right quotes for SQL, and the cases where the reverse mode needs care.
Key Takeaways
- Two modes: List to CSV joins lines into one string, and CSV to List splits a string into lines.
- Delimiters are Comma, Comma + Space, Semicolon, Pipe, Tab and Custom.
- Trim whitespace and Remove empty lines are on by default. Wrap in quotes is off.
- Quote styles are double, single and backtick. For text values in SQL, choose single quotes.
- In CSV to List mode, both comma choices split "a,b,c" and "a, b, c" the same way.
- Values inside double or single quotes stay together, so "Smith, John" remains one item.
What Is the Kwebby Comma Separating Tool?
Kwebby's Comma Separating Tool is a free online comma separator that converts a list to comma separated values and back. In List to CSV mode, each line becomes an item and the items are joined by your chosen delimiter. In CSV to List mode, delimited text is split into one item per line. Output updates as you type, and a Copy button copies it.
It belongs to Kwebby's Text Tools collection. Developers, analysts and marketers use it to prepare SQL filters, spreadsheet imports, API values and tag lists.
Key Features and How It Works
The page has two panels: Input on the left and a read-only Output on the right. Above them sit the mode buttons, the delimiter buttons and three checkboxes. Under the output, a line shows how many items the result holds.
Two modes
List to CSV expects one item per line (the placeholder shows apple, banana and orange on separate lines). CSV to List expects delimited text such as "apple, banana, orange". Switching mode changes the placeholder and the way the text is processed.
Delimiters
Choose Comma, Comma + Space, Semicolon, Pipe, Tab or Custom. Comma + Space is the default and joins items as "a, b, c". Comma joins them as "a,b,c". Choose Custom to type your own delimiter of up to 10 characters, such as a slash with spaces or a dash.
| Delimiter | Three lines "a", "b", "c" become |
|---|---|
| Comma | a,b,c |
| Comma + Space | a, b, c |
| Semicolon | a;b;c |
| Pipe | a|b|c |
| Tab | a, b and c separated by tab characters |
| Custom " / " | a / b / c |
Cleanup options
Trim whitespace removes spaces around each line. Remove empty lines drops blank lines. Both are on by default, so a messy paste such as " Ann ", a blank line, "Bob" and "Cara " becomes clean items. Turn them off if you want spaces or blanks to survive.
Quote wrapping
Tick Wrap in quotes to put a quote character on both sides of each item. A selector offers double quotes, single quotes and backticks. With single quotes, "Ann", "Bob" and "Cara" become 'Ann', 'Bob', 'Cara'. A quote character inside an item is doubled, so O'Brien becomes 'O''Brien', which is how CSV and SQL escape it. These options apply in List to CSV mode.
Why Comma Separated Lists Matter
Many systems want values on one line. A SQL filter needs "IN (1234, 5678, 9012)", an import field may want a comma list of tags, and an API call often takes a list of IDs. Copying a column from a spreadsheet gives one value per line, so a conversion step saves retyping and typos.
CSV is also a common exchange format. RFC 4180 describes the format and says fields containing line breaks, double quotes and commas should be enclosed in double quotes, with inner double quotes doubled. The tool follows that rule in both directions: it doubles quotes when it wraps items, and it keeps quoted values together when it splits.
How to Use the Comma Separating Tool
- Choose a mode. Click List to CSV to join lines, or CSV to List to split a string.
- Set the delimiter and options. Pick a delimiter, then tick Trim whitespace, Remove empty lines or Wrap in quotes.
- Paste your input and copy the output. Paste into the Input box, check the Output box and click Copy.
Worked example: numeric IDs for SQL
Paste 1234, 5678 and 9012 on three lines. With the defaults, the output is "1234, 5678, 9012". Add the parentheses yourself and you have a filter such as "WHERE id IN (1234, 5678, 9012)". Numbers need no quotes.
Worked example: text values for SQL
Paste Ann, Bob and Cara on three lines, tick Wrap in quotes and choose Single. The output is "'Ann', 'Bob', 'Cara'". Single quotes are the right choice for text values in SQL. The PostgreSQL documentation defines a string constant as characters bounded by single quotes and uses double quotes for identifiers such as table and column names. Double quotes may work on some databases, but they can fail on others.
Worked example: a plain comma list
Choose Comma. Paste red, green and blue on separate lines. The output is "red,green,blue", handy for URL parameters and tag fields.
Worked example: splitting a list back
Switch to CSV to List and paste "apple, banana, orange". The output is three lines. Paste "apple,banana,orange" with no spaces and you get the same three lines, because both comma choices split on the comma and trim the spaces around each item.
Best Practices for Comma Separated Lists
Clean the list first
Duplicates and stray values follow you into the result. Run the list through Remove Duplicate Lines before you join it, and use Change Text Case if the values must be lowercase. Check how many items you have with the Line Counter, and compare it with the item count shown under the output.
Match quotes to the destination
Use no quotes for numbers, single quotes for SQL text values, double quotes for JSON-style arrays and backticks for languages or markdown that use them. If you build an application, use parameterized queries instead of pasting values into SQL.
How CSV to List reads your text
This mode splits on the delimiter you choose, and line breaks also start a new item. Text inside double or single quotes stays together, the enclosing quotes are removed, and doubled quotes inside become one. The input "Smith, John", 42, "NY" gives three items: Smith, John, then 42, then NY. Trim whitespace and Remove empty lines apply here too. For full CSV files with headers and many columns, use the CSV to JSON Converter.
Watch values that contain the delimiter
If an item already has a comma, such as "Smith, John", joining with Comma + Space produces a list that is hard to split again. Choose a delimiter that never appears in your data, such as a pipe or a tab.
Common Use Cases
- SQL filters: turn a column of IDs or names into an IN list.
- Spreadsheet work: join a column into one cell, or split one cell into rows.
- API and config values: build lists of IDs, tags or domains.
- Email and tag lists: prepare addresses or tags for bulk import tools.
- Keyword lists: turn a block of phrases into a single line for any tool with a comma separated field.
- Combining words: split a comma list into lines before using the Word Combiner.
Related Kwebby Tools
- Remove Duplicate Lines cleans repeated lines before you join them.
- Line Counter counts the items in a list.
- Word Combiner joins word lists into every combination.
- Change Text Case converts values to lowercase, uppercase and more.
- CSV to JSON Converter converts real CSV data to JSON.
Frequently Asked Questions (FAQs)
What does a comma separating tool do?
It converts a list with one item per line into one comma separated string, or splits delimited text back into lines. Kwebby's tool also lets you pick a delimiter, trim spaces, drop blank lines and wrap items in quotes.
How do I convert a column to a comma separated list?
Copy the column from your spreadsheet, paste it into the Input box in List to CSV mode and copy the Output. The default Comma + Space delimiter returns a line such as "a, b, c". Choose Comma for no space.
Which quotes should I use for SQL?
Use single quotes for text values and no quotes for numbers. Standard SQL and PostgreSQL treat double quotes as identifiers, such as column names. Pick Single in the quote selector.
Can I use another delimiter instead of a comma?
Yes. Choose Semicolon, Pipe or Tab, or choose Custom and type your own delimiter. The same delimiter is used to split text in CSV to List mode. If you leave Custom empty, CSV to List returns the text as one item.
Why does CSV to List not split my text?
Check that the selected delimiter matches your text. Both comma choices split on any comma. For text separated by semicolons, pipes or tabs, pick that delimiter, or choose Custom and type the separator your text uses.
Is the Comma Separating Tool free?
Yes. It is free, needs no account and runs in your browser.
Final Thoughts
The Comma Separating Tool formats lists for SQL, spreadsheets, APIs and tag fields in a few clicks, with six delimiters, quote options and a reverse mode. Pick single quotes for SQL text and Comma for a list with no spaces, and use the CSV to JSON Converter for full CSV files. Paste a list now and copy the result, then clean it with Remove Duplicate Lines if needed.