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csv to yaml converter

world's simplest csv tool

Free online CSV to YAML converter. Just upload your CSV file in the form below and it will automatically get converted to a YAML file. In the tool options, you can specify the field delimiter character, field quote character, and comment character to adapt the tool to custom CSV formats. Additionally, you can select the output YAML format: one that preserves CSV headers or one that excludes CSV headers. Created by programmers from team Browserling.

᠎᠎᠎          Tool Options

Adjust Input CSV

Set the symbol that separates
fields in the input CSV.
Set the symbol that's used to
quote CSV fields.
Set the symbol that starts
comment lines in a CSV file.

Adjust Conversion

Use the fields in the first row
of the CSV as keys to set
the key names of YAML
dictionaries.
If a CSV row contains no
characters, skip it.

Adjust YAML Indentation

Set the number of spaces to
use for YAML indentation.

What is a csv to yaml converter?

This tool transforms CSV (Comma Separated Values) data into the YAML (Yet Another Markup Language) data. CSV is a simple, tabular format that's used to represent matrix-like data types consisting of rows and columns. YAML, on the other hand, is a more advanced format (actually a superset of JSON), which creates more human-readable data for serialization, and it supports lists, dictionaries, and nested objects. This program supports various input CSV formats – the input data can be comma-separated (default), semicolon-separated, pipe-separated, or use another completely different delimiter. You can specify the exact delimiter your data uses in the options. Similarly, in the options, you can specify the quote character that's used to wrap CSV fields (by default a double-quote symbol). You can also skip lines that start with comments by specifying the comment symbols in the options. This allows you to keep your data clean by skipping unnecessary lines. There are two ways to convert CSV to YAML. The first method converts each CSV row into a YAML list. The second method extracts headers from the first CSV row and creates YAML objects with keys based on these headers. You can also customize the output YAML format by specifying the number of spaces for indenting YAML structures. If you need to perform the reverse conversion, that is, transform YAML into CSV, you can use our Convert YAML to CSV tool. Csv-abulous!


Csv to yaml converter examples

Click to try

Convert Music Playlist CSV to YAML

In this example, we transform a short CSV file containing a music playlist into structured YAML data. The input CSV contains five records with three columns each and the output YAML contains five lists of lists (one list for each CSV record). In YAML, lists start with the "-" symbol and the nested lists are indented with two spaces.

The Beatles,"Yesterday",Pop Rock Queen,"Bohemian Rhapsody",Rock Nirvana,"Smells Like Teen Spirit",Grunge Michael Jackson,"Billie Jean",Pop Stevie Wonder,"Superstition",Funk
- - The Beatles - Yesterday - Pop Rock - - Queen - Bohemian Rhapsody - Rock - - Nirvana - Smells Like Teen Spirit - Grunge - - Michael Jackson - Billie Jean - Pop - - Stevie Wonder - Superstition - Funk
Required options
These options will be used automatically if you select this example.
Set the symbol that separates
fields in the input CSV.
Set the symbol that's used to
quote CSV fields.
Set the symbol that starts
comment lines in a CSV file.
Use the fields in the first row
of the CSV as keys to set
the key names of YAML
dictionaries.
If a CSV row contains no
characters, skip it.
Set the number of spaces to
use for YAML indentation.

Planetary CSV Data

In this example, we're working with CSV data that summarizes key properties of three planets in our solar system. The data consists of three columns with headers "planet", "relative mass" (with "1" being Earth's mass), and "satellites". To preserve the header names in the output YAML data, we enable the "Transform Headers" option, creating a YAML file that contains a list of YAML objects, where each object has three keys: "planet", "relative mass", and "satellites".

planet,relative mass,satellites Venus,0.815,0 Earth,1.000,1 Mars,0.107,2
- planet: Venus relative mass: '0.815' satellites: '0' - planet: Earth relative mass: '1.000' satellites: '1' - planet: Mars relative mass: '0.107' satellites: '2'
Required options
These options will be used automatically if you select this example.
Set the symbol that separates
fields in the input CSV.
Set the symbol that's used to
quote CSV fields.
Set the symbol that starts
comment lines in a CSV file.
Use the fields in the first row
of the CSV as keys to set
the key names of YAML
dictionaries.
If a CSV row contains no
characters, skip it.
Set the number of spaces to
use for YAML indentation.

Convert Non-standard CSV to YAML

In this example, we convert a CSV file with non-standard formatting into a regular YAML file. The input data uses a semicolon as a separator for the "product", "quantity", and "price" fields. It also contains empty lines and lines that are commented out. To make the program work with this custom CSV file, we input the semicolon symbol in the CSV delimiter options. To skip comments, we specify "#" as the symbol that starts comments. And to remove empty lines, we activate the option for skipping blank lines (that don't contain any symbols). In the output, we obtain a YAML file that contains a list of three objects, which use CSV headers as keys. Additionally, the objects in the YAML file are indented with four spaces.

item;quantity;price milk;2;3.50 #eggs;12;2.99 bread;1;4.25 #apples;4;1.99 cheese;1;8.99
- item: milk quantity: '2' price: '3.50' - item: bread quantity: '1' price: '4.25' - item: cheese quantity: '1' price: '8.99'
Required options
These options will be used automatically if you select this example.
Set the symbol that separates
fields in the input CSV.
Set the symbol that's used to
quote CSV fields.
Set the symbol that starts
comment lines in a CSV file.
Use the fields in the first row
of the CSV as keys to set
the key names of YAML
dictionaries.
If a CSV row contains no
characters, skip it.
Set the number of spaces to
use for YAML indentation.

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/convert-csv-to-yaml?input=The%20Beatles%2C%22Yesterday%22%2CPop%20Rock%0AQueen%2C%22Bohemian%20Rhapsody%22%2CRock%0ANirvana%2C%22Smells%20Like%20Teen%20Spirit%22%2CGrunge%0AMichael%20Jackson%2C%22Billie%20Jean%22%2CPop%0AStevie%20Wonder%2C%22Superstition%22%2CFunk&char-delimiter=%252C&char-comments=%2523&char-quote=%2522&convert-headers=false&convert-skip-empty=false&formatting-number-of-spaces=2

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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.

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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

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Sort CSV Rows

Sort the data in one or more CSV rows.

Shuffle CSV Columns

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Shuffle CSV Rows

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Shuffle CSV Values

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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

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Delete CSV Comments

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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

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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.

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

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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.

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Find the average value of CSV columns.

Average CSV Rows

Find the average value of CSV rows.

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

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CSV Viewer

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