Free online CSV column prepender. Just upload your CSV file in the form below, paste the new column in the options, and it will automatically get added before the first column of your CSV. In the tool options, you can also specify more than one column that you want to prepend, as well as choose what to do in case of incomplete CSV data and configure the visibility of comment lines and empty lines. Created by programmers from team Browserling.
Free online CSV column prepender. Just upload your CSV file in the form below, paste the new column in the options, and it will automatically get added before the first column of your CSV. In the tool options, you can also specify more than one column that you want to prepend, as well as choose what to do in case of incomplete CSV data and configure the visibility of comment lines and empty lines. Created by programmers from team Browserling.
This tool prepends one or more columns at the beginning of a CSV file. It allows you to quickly complement an existing CSV file with additional information while preserving all its original values and comma-separated structure. To do it, upload the original CSV file into the input field of this tool and enter or paste the new column (or multiple columns) in the first option. If you want to add a single column, use one value per line. If you want to add two, three, or more columns, use the corresponding number of values separated by commas on each line. In cases where the input CSV file or the specified new columns in the options contain missing fields, you can choose the handling mode for such fields. The first option, named "Output CSV Unchanged" displays the CSV with missing values as is. The second option, named "Remove Incomplete Rows" excludes the rows with missing values from the output CSV. The third option, named "Fill With Empty Values" appends a comma (which is equal to the empty symbol) in place of each missing CSV value. The fourth option, named "Fill With Custom Values" allows you to use a custom symbol specified in the options to fill in the missing data. Additionally, a pair of checkboxes in the options lets you clean the CSV file by removing empty lines and comment lines that start with a specific symbol. The two most common comment symbols are "#" (hash) and "//" (double-slash). But wait, there's more – if you need to add a column to the end of the CSV, you can use our Append a CSV Column tool, and if you need to insert a column anywhere in the CSV file, you can use our Insert a CSV Column tool. Csv-abulous!
This tool prepends one or more columns at the beginning of a CSV file. It allows you to quickly complement an existing CSV file with additional information while preserving all its original values and comma-separated structure. To do it, upload the original CSV file into the input field of this tool and enter or paste the new column (or multiple columns) in the first option. If you want to add a single column, use one value per line. If you want to add two, three, or more columns, use the corresponding number of values separated by commas on each line. In cases where the input CSV file or the specified new columns in the options contain missing fields, you can choose the handling mode for such fields. The first option, named "Output CSV Unchanged" displays the CSV with missing values as is. The second option, named "Remove Incomplete Rows" excludes the rows with missing values from the output CSV. The third option, named "Fill With Empty Values" appends a comma (which is equal to the empty symbol) in place of each missing CSV value. The fourth option, named "Fill With Custom Values" allows you to use a custom symbol specified in the options to fill in the missing data. Additionally, a pair of checkboxes in the options lets you clean the CSV file by removing empty lines and comment lines that start with a specific symbol. The two most common comment symbols are "#" (hash) and "//" (double-slash). But wait, there's more – if you need to add a column to the end of the CSV, you can use our Append a CSV Column tool, and if you need to insert a column anywhere in the CSV file, you can use our Insert a CSV Column tool. Csv-abulous!
In this example, we expand a CSV file containing data about food and its caloric content by prepending an additional column at the beginning of it. In the options, we create a new column named "Cuisine", containing five values with the origins of each dish. The tool then prepends this column at the beginning of the data and displays the updated CSV with three columns in the output.
This example transforms a CSV file of city names and their elevations into a more comprehensive dataset by adding the "Country" and "Code" columns. It prepends these two new columns before all other columns, extending each record with country information. The output CSV now shows a broader geographic context with additional information for each city.
In this example, we use our tool to quickly add a new column with header value "Type" to a CSV file of ingredients and their quantities. We assign each item a category: avocado is now labeled as fruit, quinoa is now labeled as grain, spinach is now labeled as plant, etc. However, since both the input CSV and the new CSV column are each missing a value, we use a custom symbol of ellipsis "…" to fill in the blank values. Additionally, we remove the empty lines and comment lines (starting with "#") from the input data and create a much cleaner output CSV.
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!
Edit the contents of a CSV file in a neat editor.
Remove duplicate rows in a CSV file.
Display detailed information about a CSV file.
Convert a CSV file to an HTML table.
Convert an HTML table to a CSV file.
Convert a CSV file to a Markdown table.
Convert a Markdown table to a CSV file.
Draw an ASCII table from CSV data.
Draw an ANSI table from CSV data.
Draw a Unicode table from CSV data.
Convert CSV to a PDF document.
Extract data from a PDF and create a CSV file.
Create a screenshot of CSV data.
Draw a CSV file as a PNG, JPG or GIF picture.
Extract data from an image and create a CSV file.
Convert a CSV file to an Excel spreadsheet.
Convert an Excel spreadsheet to a CSV file.
Convert a CSV file to a vCard file.
Convert a vCard file to a CSV file.
Convert CSV to a LaTeX table.
Generate SQL insert queries from a CSV file.
Create a CSV file from SQL query results.
Convert a CSV file to a qCSV (quoted CSV) file.
Convert a qCSV (quoted CSV) file to a CSV file.
Convert a CSV file to an INI file.
Convert an INI file to a CSV file.
Convert a CSV file to a JSONL (JSON Lines) file.
Convert a JSONL (JSON Lines) file to a CSV file.
Convert a CSV file to a plain text file.
Convert a plain text file to a CSV file.
Convert a CSV file to a null-separated values file (0SV).
Convert a null-separated values file (0SV) to a CSV file.
Convert a CSV file to a semicolon-separated file (SSV).
Convert a semicolon-separated file (SSV) to a CSV file.
Convert a CSV file to a hash-separated file (HSV).
Convert a hash-separated file (HSV) to a CSV file.
Convert a CSV file to a pipe-separated file (PSV).
Convert a pipe-separated file (PSV) to a CSV file.
Create an SQLite database from the given CSV file.
Export tables from an SQLite database as CSV files.
Convert a CSV file to a GeoJSON file.
Convert a GeoJSON file to a CSV file.
Merge together two or more CSV files.
Visually show the differences between two CSV files.
Run the diff algorithm on two CSV files.
Find CSV cells that contain certain data.
Return data in a CSV file that matches a pattern.
Extract a slice from a CSV file.
Cut a fragment from a CSV file.
Move CSV columns to the left or right.
Move CSV data rows up or down.
Sort the data in one or more CSV rows.
Randomly change the positions of CSV columns.
Randomly change the order of CSV rows.
Randomly change the order of all CSV values.
Change the name of CSV columns.
Generate a random CSV of any size.
Generate a CSV file that contains nothing.
Generate a large CSV file for testing.
Generate a custom CSV file with m rows and n columns.
Remove CSV columns that are completely empty.
Remove CSV rows that are completely empty.
Remove all fields in a CSV file that are empty.
Remove all empty lines in a CSV file.
Delete the comma separator from CSV files.
Delete extra commas around CSV values.
Delete comments (lines starting with # or //) from CSV files.
Delete the column header from a CSV file.
Delete the first line from a CSV file.
Minify a CSV file and remove unnecessary whitespaces.
Reduce the file size of a CSV file.
Change the character encoding of a CSV file to UTF8 or ISO-8859-1.
Add extra spaces between CSV columns.
Convert a CSV file to an m-by-n matrix.
Convert a CSV file to an array of arrays of fields.
Convert an array of arrays of fields to a CSV file.
Create a list from one or more CSV columns.
Create a list from one or more CSV rows.
Create an array from one or more CSV columns.
Create an array from one or more CSV rows.
Find the number of rows and columns of a CSV file.
Find the number of columns in a CSV file.
Find the number of rows in a CSV file.
Find the sum of CSV columns.
Find the sum of CSV rows.
Find the average value of CSV columns.
Find the average value of CSV rows.
Use different colors for CSV data, quotes, and commas.
Animate CSV data by showing column after column.
Automatically fix a broken CSV.
Introduce random errors to a CSV file for fuzz testing.
Hide personal or sensitive information in a CSV file.
Mask data in a CSV file.
Hide a secret message in a CSV.
Encrypt a CSV file and hide information in it.
Decrypt a previously encrypted CSV file and make it readable.
Create a visual drawing that shows the CSV structure.
Create a new CSV file in the browser.
Distort a CSV file by infusing it with Zalgo characters.
Neutralize the chaotic Zalgo and restore CSV integrity.
Preview the contents of a CSV file in an interactive editor.
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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!
