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TSV Column Prepender

World's Simplest TSV Tool

Simple and free online TSV column prepender. Just paste a Tab Separated Values file into the form below, enter the columns to prepend in the options, and the tool will add those fields before the first column of each row. You can prepend one column or several tab-separated columns at once, remove blank and commented rows, and choose how missing TSV fields should be handled. Created by programmers from team Browserling.

TSV Column Prepender

World's Simplest TSV Tool

Simple and free online TSV column prepender. Just paste a Tab Separated Values file into the form below, enter the columns to prepend in the options, and the tool will add those fields before the first column of each row. You can prepend one column or several tab-separated columns at once, remove blank and commented rows, and choose how missing TSV fields should be handled. Created by programmers from team Browserling.

Tool Options

Columns to Prepend

Enter one or more TSV columns to place before the current first column.
For one new column, enter one value per line. For multiple columns, separate values with tab characters on each line.
For example: Country ⇥ Currency France ⇥ EUR Japan ⇥ JPY

Missing TSV Fields

Set what happens when TSV rows do not have matching numbers of fields.
Use this value when filling missing TSV fields in custom fill mode.

TSV Cleanup

Rows beginning with this marker are skipped.
Skip blank TSV rows before prepending columns.

What Is a TSV Column Prepender?

This online tool prepends one or more columns to a Tab Separated Values (TSV) table. Prepending columns means adding new fields at the beginning of each row, before the current first column, while keeping the existing TSV data in the same row order. The original cells are not rewritten or reordered; they are shifted to the right to make room for the new leading columns. In the "Columns to Prepend" option, enter the values that should be added to the left side of the table. To prepend a single column, enter one value for each input row. To prepend multiple columns, enter one row of tab-separated values for each input row. If the original TSV and the columns being prepended do not have matching field counts, you can keep rows as they are, skip incomplete rows, use empty fields, or fill missing fields with a custom value. The cleanup options can remove blank TSV rows and skip comment rows that begin with a selected marker, such as "#" or "//". To add fields after the last column, use our Append TSV Columns tool, and to place fields at a specific position, use our Insert TSV Columns tool. Tsv-abulous!

What Is a TSV Column Prepender?

This online tool prepends one or more columns to a Tab Separated Values (TSV) table. Prepending columns means adding new fields at the beginning of each row, before the current first column, while keeping the existing TSV data in the same row order. The original cells are not rewritten or reordered; they are shifted to the right to make room for the new leading columns. In the "Columns to Prepend" option, enter the values that should be added to the left side of the table. To prepend a single column, enter one value for each input row. To prepend multiple columns, enter one row of tab-separated values for each input row. If the original TSV and the columns being prepended do not have matching field counts, you can keep rows as they are, skip incomplete rows, use empty fields, or fill missing fields with a custom value. The cleanup options can remove blank TSV rows and skip comment rows that begin with a selected marker, such as "#" or "//". To add fields after the last column, use our Append TSV Columns tool, and to place fields at a specific position, use our Insert TSV Columns tool. Tsv-abulous!


TSV Column Prepender Examples

Click to try!
click me

Prepend a Library Branch Column

In this example, we prepend one new column to a TSV library catalog. The original table has "genre", "shelf", and "books" columns. In the options, we enter one "branch" value for each row. The tool adds the "branch" column before the current first column and shifts the original TSV fields to the right.

genre shelf books fiction A1 120 history B4 85 science C2 64
branch genre shelf books Central fiction A1 120 West history B4 85 East science C2 64
Required options
These options will be used automatically if you select this example.
Enter one or more TSV columns to place before the current first column.
Set what happens when TSV rows do not have matching numbers of fields.
Use this value when filling missing TSV fields in custom fill mode.
Rows beginning with this marker are skipped.
Skip blank TSV rows before prepending columns.
click me

Prepend Garden Plant Columns

In this example, we extend a TSV plant list by placing two new columns at the far left of the table. In the options, we enter "zone" and "sun" values for each plant row. As a result, the original "plant", "color", and "height" fields move to the right, and the new "zone" and "sun" fields appear before them.

plant color height rose red 80cm iris purple 45cm mint green 30cm
zone sun plant color height front full rose red 80cm side partial iris purple 45cm back shade mint green 30cm
Required options
These options will be used automatically if you select this example.
Enter one or more TSV columns to place before the current first column.
Set what happens when TSV rows do not have matching numbers of fields.
Use this value when filling missing TSV fields in custom fill mode.
Rows beginning with this marker are skipped.
Skip blank TSV rows before prepending columns.
click me

Prepend Days to a Workout TSV

In this example, we prepend one "day" column to a TSV workout list. Before adding the new column, the tool removes the empty row and skips the "// old plan" comment row. There are four workout rows left, but only three "day" values are provided in the options, so the missing day is filled with the custom value "no-day".

move sets level squats 3 medium plank 2 easy lunges 4 hard // old plan pushups 3 medium
day move sets level Monday squats 3 medium Tuesday plank 2 easy Friday lunges 4 hard no-day pushups 3 medium
Required options
These options will be used automatically if you select this example.
Enter one or more TSV columns to place before the current first column.
Set what happens when TSV rows do not have matching numbers of fields.
Use this value when filling missing TSV fields in custom fill mode.
Rows beginning with this marker are skipped.
Skip blank TSV rows before prepending columns.

Pro tips Master online tsv 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/tsv/prepend-tsv-columns?input=genre%09shelf%09books%0Afiction%09A1%09120%0Ahistory%09B4%0985%0Ascience%09C2%0964&insert-column=branch%250ACentral%250AWest%250AEast&incomplete-format=leave-incomplete&custom-value=N%252FA&remove-comments=false&comment-character=%2523&remove-empty-lines=false

All TSV Tools

Didn't find the tool you were looking for? Let us know what tool we are missing and we'll build it!
Quickly change the TSV delimiter to a different symbol.
Quickly generate random TSV data.
Quickly extract selected columns from a TSV file.
Quickly delete selected columns in a TSV file.
Quickly remove tabs that go between TSV columns and merge all data.
Quickly add quotes around TSV columns.
Quickly remove quotes that surround TSV columns.
Quickly swap columns in a TSV file.
Quickly sort TSV data by selected column values.
Quickly convert a TSV file to a JSON data structure.
Quickly convert a JSON data structure to TSV format.
Quickly convert a TSV file to XML markup.
Quickly convert XML markup to a TSV file.
Quickly convert a TSV file to YAML markup.
Quickly convert YAML data to a TSV file.
Quickly convert TSV data to CSV data.
Quickly convert CSV data to TSV data.
Quickly convert TSV data to nicely aligned text columns.
Quickly convert text columns to TSV columns.
Quickly convert TSV data to base64 encoding.
Quickly convert base64-encoded TSV data to TSV data.
Quickly convert a TSV file to URL-encoding.
Quickly convert a URL-encoded TSV file back to TSV.
Quickly add one or more columns before the first TSV column.
Quickly append new columns at the end of a TSV file.
Quickly insert new columns anywhere in a TSV file.
Quickly replace selected columns in a TSV file.
Quickly remove extra spaces around TSV columns.
Quickly truncate the contents of TSV cells to any length.
Quickly exchange TSV columns with rows.
Quickly exchange TSV rows with columns.
Quickly transpose a TSV file.
Quickly inspect the structure and contents of a TSV file.
Quickly check a TSV file for errors and report them.
Quickly test tab-separated data for row and field problems.
Quickly locate missing and blank cells in TSV data.
Quickly fill missing and blank cells in TSV data.

Coming Soon

These TSV tools are on the way!
Calculate TSV Entropy

Find the complexity of a TSV file.

Show TSV Structure

Create an abstract drawing that shows the structure of a TSV.

View and Edit TSV

Show a TSV file in a neat editor and allow easy editing.

Convert TSV to Double-TSV

Convert a TSV file to a double-TSV file.

Convert Double-TSV to TSV

Convert a double-TSV file to a regular TSV file.

Convert TSV to HTML Table

Convert a Tab Separated Values file to an HTML table.

Convert HTML Table to TSV

Convert an HTML table to a Tab Separated Values file.

Convert TSV to Markdown

Convert a TSV file to a Markdown table.

Convert Markdown to TSV

Convert a Markdown table to a TSV file.

Convert TSV to PDF

Convert a Tab Separated Values file to a PDF document.

Convert PDF to TSV

Convert a PDF document to a Tab Separated Values file.

Convert TSV to Image

Draw Tab Separated Values as a table and output it as an image.

Convert Image to TSV

Extract data in an image and format it as a TSV file.

Convert TSV to Excel

Convert a Tab Separated Values file to an Excel spreadsheet.

Convert Excel to TSV

Convert an Excel file to a Tab Separated Values file.

Convert TSV to LaTeX

Convert a TSV file to LaTeX code that generates a table.

Convert TSV to ASCII Table

Convert a Tab Separated Values file to a neat ASCII table.

Convert ASCII Table to TSV

Convert an ASCII table to a Tab Separated Values file.

Convert TSV to SQL

Convert a Tab Separated Values file to an SQL query.

Convert TSV to SQLite

Convert a Tab Separated Values file to an SQLite database.

Convert SQLite to TSV

Export tables from an SQLite database as TSV files.

Convert TSV to PSV

Convert a TSV file to a PSV (Pipe Separated Values) file.

Convert PSV to TSV

Convert a PSV (Pipe Separated Values) file to a TSV file.

Convert TSV to HSV

Convert a TSV file to a HSV (Hash Separated Values) file.

Convert HSV to TSV

Convert a HSV (Hash Separated Values) file to a TSV file.

Convert TSV to SSV

Convert a TSV file to a SSV (Semicolon Separated Values) file.

Convert SSV to TSV

Convert a SSV (Semicolon Separated Values) file to a TSV file.

Convert TSV to 0SV

Convert a TSV file to a 0SV (Null Separated Values) file.

Convert 0SV to TSV

Convert a 0SV (Null Separated Values) file to a TSV file.

Split a TSV File

Create multiple TSV files from the given TSV file.

Merge TSV Files

Merge together two Tab Separated Values files.

Delete Empty TSV Columns

Remove columns that have no values in a TSV file.

Delete Empty TSV Rows

Remove rows that have no values in a TSV file.

Delete Empty TSV Lines

Remove lines in a TSV file that are blank.

Delete TSV Comments

Delete TSV lines that are comments.

Filter TSV Data

Filter rows and columns that match a pattern.

Find Values in TSV

Find certain values in TSV cells.

Find Duplicate TSV Rows

Extract repeated rows in a TSV file.

Merge Duplicate TSV Rows

Combine duplicate rows in a TSV file.

Deduplicate TSV Rows

Remove repeated rows from a TSV file.

Delete Duplicate TSV Rows

Delete duplicate rows from a TSV file.

Compress TSV

Minify a TSV file and remove extra spaces and indentation.

Compare Two TSV Files

Diff two TSV files and visually display the differences.

Rotate TSV Columns

Rotate TSV columns to the left or right.

Rotate TSV Rows

Rotate TSV rows up or down.

Cut a TSV File

Cut a fragment from a TSV file.

Slice a TSV File

Extract a slice (rows/columns/cells) of a TSV file.

Randomize TSV Values

Shuffle all data values in a TSV file.

Randomize TSV Columns

Shuffle the order of TSV columns.

Randomize TSV Rows

Shuffle the order of TSV rows.

Sort TSV Rows

Sort values in a TSV rows.

Count TSV Columns

Find how many columns there are in the given TSV data.

Count TSV Rows

Find how many rows there are in the given TSV data.

Count TSV Entries

Find how many total entries there are in a TSV file.

Color a TSV File

Add colors to TSV data for easy visual overview of the file.

Add Errors to TSV

Create random errors in a TSV file for fuzz testing.

Create a Custom TSV

Generate a custom TSV with n rows and m columns.

Open a TSV File

Open a TSV file directly in your browser.


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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, we love to make developers' lives easier, so we created this collection of online TSV 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. Behind the scenes, all our TSV tools are actually powered by our programming tools that we created over the last couple of years. Check them out!

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