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CSV Trimmer

World's Simplest CSV Tool

Free online CSV column trimmer. Just upload your CSV file in the form below, adjust the trimming options, and this tool will automatically trim the values in CSV columns. In the tool options, you can choose between trimming all columns at once or trimming specific columns by their positions or names. Additionally, you can select the trimming side (left, right, or both) and activate header trimming. Created by programmers from team Browserling.

CSV Trimmer

World's Simplest CSV Tool

Free online CSV column trimmer. Just upload your CSV file in the form below, adjust the trimming options, and this tool will automatically trim the values in CSV columns. In the tool options, you can choose between trimming all columns at once or trimming specific columns by their positions or names. Additionally, you can select the trimming side (left, right, or both) and activate header trimming. Created by programmers from team Browserling.

᠎᠎᠎          Tool Options

Columns To Trim

Trim all values in all columns.
Column numbers to trim.
(E.g., "1", "2-5", or "3-5, 8".)
Column names to trim.
(One per line.)
Apply trimming to all columns
that have the same header.

Trim Side and Headers

Remove whitespaces from
the left side of columns.
Remove whitespaces from
the right side of columns.
Trim headers in the
first CSV row.

Column Cleanup

Specify which symbol is used
to denote comments in the file.
When the checkbox is activated,
comment lines are deleted.
When the checkbox is activated,
empty lines are deleted.

What Is a CSV Trimmer?

This tool trims spaces around CSV (Comma Separated Values) columns. Often, when creating or exporting a CSV file, trailing or leading spaces accidentally appear around the values. To ensure the cleanliness and correctness of the data, it's useful to remove these spaces. This tool does just that and it goes through all (or specific) columns in a CSV file and removes the leading and/or trailing spaces (and tabs) from the cells. In the options, you can choose which exact columns to trim. By default, all columns are simultaneously trimmed but you can choose to trim a certain column by specifying its position or name. If you specify columns by their position, you can use simple numbers to refer to the columns that need trimming, starting with "1" for the first column, "2" for the second column, etc. You can also combine columns and use ranges. For example, "1, 3, 6" selects columns one, three, and six; "1-4" is a range syntax that inclusively selects all columns from one to four (it's the same as writing "1, 2, 3, 4"); "1, 3-6" is a combined syntax, which selects the first column and columns three to six inclusive (it's the same as writing "1, 3, 4, 5, 6"). Additionally, you can use negative positions. For example, "-1" and "-2", which means numbering from the end. "-1" means the last column and "-2" means the one before the last column. If you specify columns by their name, you can enter as many header values (column titles) as you like in the options, one per line. Headers are often named "name", "id", "city", "age", and so on. If the same name is used as a header for multiple columns, you can activate the "Trim All Column Duplicates" option to trim all of these columns. Column trimming can be done on the left side, the right side, or both sides. You can control this using checkboxes in the second block of options. Also, you can choose whether to trim column headers or not. Additionally, the program can delete comment lines from the file. To do this, specify the symbol used to denote comments in a CSV file. For example, this can be the "#" symbol or "//" symbol, which must stand at the beginning of a line. To delete the empty lines from a CSV file, activate the "Remove All Empty Lines" option. Csv-abulous!

What Is a CSV Trimmer?

This tool trims spaces around CSV (Comma Separated Values) columns. Often, when creating or exporting a CSV file, trailing or leading spaces accidentally appear around the values. To ensure the cleanliness and correctness of the data, it's useful to remove these spaces. This tool does just that and it goes through all (or specific) columns in a CSV file and removes the leading and/or trailing spaces (and tabs) from the cells. In the options, you can choose which exact columns to trim. By default, all columns are simultaneously trimmed but you can choose to trim a certain column by specifying its position or name. If you specify columns by their position, you can use simple numbers to refer to the columns that need trimming, starting with "1" for the first column, "2" for the second column, etc. You can also combine columns and use ranges. For example, "1, 3, 6" selects columns one, three, and six; "1-4" is a range syntax that inclusively selects all columns from one to four (it's the same as writing "1, 2, 3, 4"); "1, 3-6" is a combined syntax, which selects the first column and columns three to six inclusive (it's the same as writing "1, 3, 4, 5, 6"). Additionally, you can use negative positions. For example, "-1" and "-2", which means numbering from the end. "-1" means the last column and "-2" means the one before the last column. If you specify columns by their name, you can enter as many header values (column titles) as you like in the options, one per line. Headers are often named "name", "id", "city", "age", and so on. If the same name is used as a header for multiple columns, you can activate the "Trim All Column Duplicates" option to trim all of these columns. Column trimming can be done on the left side, the right side, or both sides. You can control this using checkboxes in the second block of options. Also, you can choose whether to trim column headers or not. Additionally, the program can delete comment lines from the file. To do this, specify the symbol used to denote comments in a CSV file. For example, this can be the "#" symbol or "//" symbol, which must stand at the beginning of a line. To delete the empty lines from a CSV file, activate the "Remove All Empty Lines" option. Csv-abulous!


CSV Trimmer Examples

Click to try!
click me

Trim All CSV Columns

In this example, we trim all columns in CSV data, removing excess spacing on the left and right sides of each column. This cleanup ensures data consistency across all columns in the dataset, making it easier to work with and analyze.

" x "," y"," z" " 4"," 7 ","9 " " a "," b"," c"
x,y,z 4,7,9 a,b,c
Required options
These options will be used automatically if you select this example.
Trim all values in all columns.
Remove whitespaces from
the left side of columns.
Remove whitespaces from
the right side of columns.
Trim headers in the
first CSV row.
Specify which symbol is used
to denote comments in the file.
When the checkbox is activated,
comment lines are deleted.
When the checkbox is activated,
empty lines are deleted.
click me

Trim Selected Columns by Their Positions

In this example, we trim only specific columns in a CSV file based on their numerical position in the file. We select columns 2 and 3, which stand for contain prices and LiveTV availability. We perform only left trimming, removing all spaces before all values in the specified columns.

Service ,Price , LiveTV Netflix , $15.99 , No Disney+ , $7.99 , No HBO Max , $14.99 ,Yes Hulu ,$12.99 ,Yes Apple TV+ , $4.99 , No
" Service ","Price ","LiveTV " " Netflix ","$15.99 ","No " " Disney+ ","$7.99 ","No " " HBO Max ","$14.99 ","Yes " " Hulu ","$12.99 ","Yes " " Apple TV+ ","$4.99 ","No "
Required options
These options will be used automatically if you select this example.
Column numbers to trim.
(E.g., "1", "2-5", or "3-5, 8".)
Remove whitespaces from
the left side of columns.
Remove whitespaces from
the right side of columns.
Trim headers in the
first CSV row.
Specify which symbol is used
to denote comments in the file.
When the checkbox is activated,
comment lines are deleted.
When the checkbox is activated,
empty lines are deleted.
click me

Trim Selected Columns by Name

In this example, we trim columns based on their names. Specifically, we trim just the "Item" column, which includes item descriptions such as t-shirts, sweaters, jeans, and dresses. In addition to trimming, we also clear the CSV file of empty lines and comments that begin with the "#" character. You may notice that after trimming, cells in other columns get wrapped in quotes. That's ok because quotes are part of CSV and they make the extra whitespace in other columns more visible so that you don't make mistakes when handling these values.

Id, Item , Material, Season 01, T-shirt, Cotton, Summer 02, Sweater , Wool, Fall 03, Jeans , Denim, All Seasons 04, Dress , Silk, Spring #05, Jacket , Leather, Winter
Id,Item," Material"," Season" 01,T-shirt," Cotton"," Summer" 02,Sweater," Wool"," Fall" 03,Jeans," Denim"," All Seasons" 04,Dress," Silk"," Spring"
Required options
These options will be used automatically if you select this example.
Column names to trim.
(One per line.)
Apply trimming to all columns
that have the same header.
Remove whitespaces from
the left side of columns.
Remove whitespaces from
the right side of columns.
Trim headers in the
first CSV row.
Specify which symbol is used
to denote comments in the file.
When the checkbox is activated,
comment lines are deleted.
When the checkbox is activated,
empty lines are deleted.

Pro tips Master online csv tools

You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!

https://onlinetools.com/csv/trim-csv-columns?input=%22%20%20x%20%20%22%2C%22%20%20y%22%2C%22%20%20%20z%22%0A%22%20%20%20%20%204%22%2C%22%20%20%20%20%207%20%20%22%2C%229%20%20%20%22%0A%22%20%20a%20%20%22%2C%22%20%20%20b%22%2C%22%20%20%20c%22&select-all-columns=true&left-trim=true&right-trim=true&trim-headers=true&remove-comments=true&comment-character=%2523&remove-empty-lines=true

All CSV Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly convert a CSV file to a JSON data structure.
Quickly convert a JSON data structure to a CSV file.
Quickly convert a CSV file to an XML file.
Quickly convert an XML file to a CSV file.
Quickly convert a CSV file to a YAML file.
Quickly convert a YAML file to a CSV file.
Quickly convert a CSV file to a TSV file.
Quickly convert a TSV file to a CSV file.
Quickly convert a CSV file to evenly aligned text columns.
Quickly convert text columns to a CSV file.
Quickly encode CSV to base64.
Quickly decode base64 to CSV.
Quickly convert CSV to URL-encoding.
Quickly decode CSV from URL-encoding.
Quickly change the CSV column delimiter to a new symbol.
Quickly prepend columns at the beginning of a CSV file.
Quickly append one or more new columns at the end of a CSV file.
Quickly insert one or more new columns anywhere in a CSV file.
Quickly export one or more columns from a CSV file.
Quickly replace any column in a CSV file with a new one.
Quickly delete one or more columns from a CSV file.
Quickly swap two columns in a CSV file.
Quickly exchange columns with rows in a CSV file.
Quickly exchange rows with columns in a CSV file.
Quickly transpose a CSV file.
Quickly truncate columns in a CSV file.
Quickly left-trim and right-trim column values in a CSV file.
Quickly sort data in one or more CSV columns.
Quickly remove double quotes from all CSV fields.
Quickly wrap all CSV fields in double quotes.
Quickly change the character that CSV fields are wrapped in.
Quickly make sure the given CSV file doesn't have errors.
Quickly find rows and columns in CSV that are missing values.
Quickly fill missing CSV values with placeholder values.

Coming Soon

These CSV tools are on the way!
Edit CSV in the Browser

Edit the contents of a CSV file in a neat editor.

Deduplicate CSV Data

Remove duplicate rows in a CSV file.

Analyze CSV

Display detailed information about a CSV file.

Convert CSV to HTML

Convert a CSV file to an HTML table.

Convert HTML to CSV

Convert an HTML table to a CSV file.

Convert CSV to Markdown

Convert a CSV file to a Markdown table.

Convert Markdown to CSV

Convert a Markdown table to a CSV file.

Convert CSV to ASCII Table

Draw an ASCII table from CSV data.

Convert CSV to ANSI Table

Draw an ANSI table from CSV data.

Convert CSV to Unicode Table

Draw a Unicode table from CSV data.

Convert CSV to PDF

Convert CSV to a PDF document.

Convert PDF to CSV

Extract data from a PDF and create a CSV file.

Convert CSV to a Screenshot

Create a screenshot of CSV data.

Convert CSV to an Image

Draw a CSV file as a PNG, JPG or GIF picture.

Convert Image to CSV

Extract data from an image and create a CSV file.

Convert CSV to Excel

Convert a CSV file to an Excel spreadsheet.

Convert Excel to CSV

Convert an Excel spreadsheet to a CSV file.

Convert CSV to vCard

Convert a CSV file to a vCard file.

Convert vCard to CSV

Convert a vCard file to a CSV file.

Convert CSV to LaTeX

Convert CSV to a LaTeX table.

Convert CSV to SQL

Generate SQL insert queries from a CSV file.

Convert SQL to CSV

Create a CSV file from SQL query results.

Convert CSV to qCSV

Convert a CSV file to a qCSV (quoted CSV) file.

Convert qCSV to CSV

Convert a qCSV (quoted CSV) file to a CSV file.

Convert CSV to INI

Convert a CSV file to an INI file.

Convert INI to CSV

Convert an INI file to a CSV file.

Convert CSV to JSONL

Convert a CSV file to a JSONL (JSON Lines) file.

Convert JSONL to CSV

Convert a JSONL (JSON Lines) file to a CSV file.

Convert CSV to TXT

Convert a CSV file to a plain text file.

Convert TXT to CSV

Convert a plain text file to a CSV file.

Convert CSV to 0SV

Convert a CSV file to a null-separated values file (0SV).

Convert 0SV to CSV

Convert a null-separated values file (0SV) to a CSV file.

Convert CSV to SSV

Convert a CSV file to a semicolon-separated file (SSV).

Convert SSV to CSV

Convert a semicolon-separated file (SSV) to a CSV file.

Convert CSV to HSV

Convert a CSV file to a hash-separated file (HSV).

Convert HSV to CSV

Convert a hash-separated file (HSV) to a CSV file.

Convert CSV to PSV

Convert a CSV file to a pipe-separated file (PSV).

Convert PSV to CSV

Convert a pipe-separated file (PSV) to a CSV file.

Convert CSV to SQLite

Create an SQLite database from the given CSV file.

Convert SQLite to CSV

Export tables from an SQLite database as CSV files.

Convert CSV to GeoJSON

Convert a CSV file to a GeoJSON file.

Convert GeoJSON to CSV

Convert a GeoJSON file to a CSV file.

Merge CSV Files

Merge together two or more CSV files.

Compare Two CSV Files

Visually show the differences between two CSV files.

Diff Two CSV Files

Run the diff algorithm on two CSV files.

Find Data in CSV

Find CSV cells that contain certain data.

Filter CSV Cells

Return data in a CSV file that matches a pattern.

Slice CSV

Extract a slice from a CSV file.

Cut CSV

Cut a fragment from a CSV file.

Rotate CSV Columns

Move CSV columns to the left or right.

Rotate CSV Rows

Move CSV data rows up or down.

Sort CSV Rows

Sort the data in one or more CSV rows.

Shuffle CSV Columns

Randomly change the positions of CSV columns.

Shuffle CSV Rows

Randomly change the order of CSV rows.

Shuffle CSV Values

Randomly change the order of all CSV values.

Rename CSV Columns

Change the name of CSV columns.

Create a Random CSV

Generate a random CSV of any size.

Create an Empty CSV File

Generate a CSV file that contains nothing.

Create a Large CSV File

Generate a large CSV file for testing.

Create a Custom CSV File

Generate a custom CSV file with m rows and n columns.

Delete Empty CSV Columns

Remove CSV columns that are completely empty.

Delete Empty CSV Rows

Remove CSV rows that are completely empty.

Delete Empty CSV Values

Remove all fields in a CSV file that are empty.

Delete Empty CSV Lines

Remove all empty lines in a CSV file.

Remove CSV Separator

Delete the comma separator from CSV files.

Remove Extra CSV Commas

Delete extra commas around CSV values.

Delete CSV Comments

Delete comments (lines starting with # or //) from CSV files.

Delete CSV Header

Delete the column header from a CSV file.

Delete First CSV Line

Delete the first line from a CSV file.

Compress a CSV File

Minify a CSV file and remove unnecessary whitespaces.

Optimize CSV File Size

Reduce the file size of a CSV file.

Change CSV Encoding

Change the character encoding of a CSV file to UTF8 or ISO-8859-1.

Add Extra Spaces in CSV

Add extra spaces between CSV columns.

Convert CSV to a Matrix

Convert a CSV file to an m-by-n matrix.

Convert CSV to an Array of Arrays

Convert a CSV file to an array of arrays of fields.

Convert an Array of Arrays to CSV

Convert an array of arrays of fields to a CSV file.

Convert CSV Columns to a List

Create a list from one or more CSV columns.

Convert CSV Rows to a List

Create a list from one or more CSV rows.

Convert CSV Columns to an Array

Create an array from one or more CSV columns.

Convert CSV Rows to an Array

Create an array from one or more CSV rows.

Find CSV Dimensions

Find the number of rows and columns of a CSV file.

Count CSV Columns

Find the number of columns in a CSV file.

Count CSV Rows

Find the number of rows in a CSV file.

Sum CSV Columns

Find the sum of CSV columns.

Sum CSV Rows

Find the sum of CSV rows.

Average CSV Columns

Find the average value of CSV columns.

Average CSV Rows

Find the average value of CSV rows.

Add Color to CSV

Use different colors for CSV data, quotes, and commas.

Animate a CSV File

Animate CSV data by showing column after column.

Fix a Broken CSV

Automatically fix a broken CSV.

Add Errors to CSV

Introduce random errors to a CSV file for fuzz testing.

Anonymize CSV Data

Hide personal or sensitive information in a CSV file.

Censor CSV Data

Mask data in a CSV file.

Hide a Message in a CSV

Hide a secret message in a CSV.

Encrypt CSV

Encrypt a CSV file and hide information in it.

Decrypt CSV

Decrypt a previously encrypted CSV file and make it readable.

Visualize CSV

Create a visual drawing that shows the CSV structure.

Create a CSV File

Create a new CSV file in the browser.

Unleash Zalgo on CSV

Distort a CSV file by infusing it with Zalgo characters.

Purge Zalgo from CSV

Neutralize the chaotic Zalgo and restore CSV integrity.

CSV Viewer

Preview the contents of a CSV file in an interactive editor.


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Created with love by

We're Browserling — a friendly and fun cross-browser testing company powered by alien technology. At Browserling our mission is to make people's lives easier, so we created this collection of CSV tools. Our tools have the simplest user interface that doesn't require advanced computer skills and they are used by millions of people every month. Our CSV tools are actually powered by our web developer tools that we created over the last couple of years. Check them out!

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