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CSV Analyzer Premium Tool

World's Simplest CSV Tool

Free online CSV analyzer. Just upload your CSV file in the form below, and this tool will automatically print detailed information about its structure, values, and selected columns. In the options, you can choose which statistics to include in the output, such as general CSV dimensions, value type detection, shortest and longest values, and detailed statistics for specific columns. Created by programmers from team Browserling.

CSV Analyzer

World's Simplest CSV Tool

Free online CSV analyzer. Just upload your CSV file in the form below, and this tool will automatically print detailed information about its structure, values, and selected columns. In the options, you can choose which statistics to include in the output, such as general CSV dimensions, value type detection, shortest and longest values, and detailed statistics for specific columns. Created by programmers from team Browserling.

Tool Options

Input CSV Format

Character that separates CSV values.
Character that wraps quoted CSV fields.
CSV lines starting with this character are comments and are not analyzed.
Empty CSV lines are ignored and are not analyzed.

CSV Header Row

Treat the first CSV row as headers.
If enabled, header values won't count in value totals or type analysis. Header names still work for column selection.

Information Blocks

Print row, column, empty, and missing CSV value counts.
Print string, number, boolean, date, time, email, and URL counts.
Print shortest and longest non-empty CSV values.

Column Analysis

Print statistics for selected CSV columns.
Specify column numbers or ranges. Examples: "2, -1" or "1-3".
Specify CSV header names to analyze, one per line.
If a CSV header repeats, analyze all matching columns.

What Is a CSV Analyzer?

This tool analyzes CSV (Comma Separated Values) files and prints a detailed plain-text report about the file structure and values. It helps you inspect the CSV structure and contents before using the data. Paste your CSV into the input box, and the tool will count rows, columns, expected values, total values, empty values, whitespace-only values, and missing values. It also detects common value types, such as strings, integers, decimals, booleans, dates, times, date-and-time values, email addresses, and URLs. In the input options, you can choose the delimiter character, quote character, and comment-line prefix. For example, use a comma for regular CSV, a semicolon for semicolon-separated files, or \t for tab-separated data. If your file contains comment lines that start with a character such as #, the tool can skip them. You can also skip empty lines and choose whether the first analyzable row should be treated as headers. When headers are skipped, they are excluded from statistics, but they can still be used for selecting columns by name. The analysis can include three main sections. General information provides an overview of the CSV. It prints the number of analyzed rows and columns, the expected number of values, the actual total number of values, and the locations of empty, whitespace-only, and missing values. The value types section shows the types of data that appear in the CSV. It counts string values, numeric values, integers, decimals, booleans, dates, times, date-and-time values, email addresses, and URLs. The value lengths section lists the shortest and longest non-empty values. Each listed value includes its character length and its original row and column position, so you can quickly find unusually short or long fields in the source CSV. You can also enable column analysis to inspect specific columns in more detail. Select columns by position, such as 1, 2, 5, or by ranges, such as 1-3. Negative positions count from the end, so -1 means the last column and -2 means the second-to-last column. You can also select a column by its header name, and if the same header appears more than once, you can analyze all matching columns. Each column report shows the actual column number, the first value in that column, the total number of existing values, the number of empty values, the number of whitespace-only values, the number of missing values, the detected value type, the numeric minimum, maximum, average, and the shortest or longest values. Csv-abulous!

What Is a CSV Analyzer?

This tool analyzes CSV (Comma Separated Values) files and prints a detailed plain-text report about the file structure and values. It helps you inspect the CSV structure and contents before using the data. Paste your CSV into the input box, and the tool will count rows, columns, expected values, total values, empty values, whitespace-only values, and missing values. It also detects common value types, such as strings, integers, decimals, booleans, dates, times, date-and-time values, email addresses, and URLs. In the input options, you can choose the delimiter character, quote character, and comment-line prefix. For example, use a comma for regular CSV, a semicolon for semicolon-separated files, or \t for tab-separated data. If your file contains comment lines that start with a character such as #, the tool can skip them. You can also skip empty lines and choose whether the first analyzable row should be treated as headers. When headers are skipped, they are excluded from statistics, but they can still be used for selecting columns by name. The analysis can include three main sections. General information provides an overview of the CSV. It prints the number of analyzed rows and columns, the expected number of values, the actual total number of values, and the locations of empty, whitespace-only, and missing values. The value types section shows the types of data that appear in the CSV. It counts string values, numeric values, integers, decimals, booleans, dates, times, date-and-time values, email addresses, and URLs. The value lengths section lists the shortest and longest non-empty values. Each listed value includes its character length and its original row and column position, so you can quickly find unusually short or long fields in the source CSV. You can also enable column analysis to inspect specific columns in more detail. Select columns by position, such as 1, 2, 5, or by ranges, such as 1-3. Negative positions count from the end, so -1 means the last column and -2 means the second-to-last column. You can also select a column by its header name, and if the same header appears more than once, you can analyze all matching columns. Each column report shows the actual column number, the first value in that column, the total number of existing values, the number of empty values, the number of whitespace-only values, the number of missing values, the detected value type, the numeric minimum, maximum, average, and the shortest or longest values. Csv-abulous!


CSV Analyzer Examples

Click to try!
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Analyze a Simple Book CSV

In this example, we analyze a short reading list CSV containing book titles, page counts, and read flags (true/false). We enable only the General Information and Value Types blocks. The report shows that the CSV has 3 rows, 3 columns, and 9 values that should exist; all 9 values are present, so there are no empty, whitespace-only, or missing fields. The value type analysis shows that the CSV contains text values, integer page counts, and boolean read flags.

book,pages,read Dune,412,true Emma,352,false
General Information: -------------------- Rows: 3 (including header row) Columns: 3 Expected values: 9 (3 rows × 3 columns) Total values: 9 (including empty and whitespace-only values) Empty values: 0 (zero-length values and whitespace-only values) Whitespace-only values: 0 Missing values: 0 Value Types: ------------ String values: 5 Numeric values: 2 • Integer values: 2 • Decimal values: 0 Boolean values: 2 (values: true, false) Date values: 0 Time values: 0 Date and time values: 0 Email values: 0 URL values: 0
Required options
These options will be used automatically if you select this example.
Character that separates CSV values.
Character that wraps quoted CSV fields.
CSV lines starting with this character are comments and are not analyzed.
Empty CSV lines are ignored and are not analyzed.
Treat the first CSV row as headers.
Print row, column, empty, and missing CSV value counts.
Print string, number, boolean, date, time, email, and URL counts.
Print shortest and longest non-empty CSV values.
Print statistics for selected CSV columns.
Specify column numbers or ranges. Examples: "2, -1" or "1-3".
Specify CSV header names to analyze, one per line.
If a CSV header repeats, analyze all matching columns.
click me

Analyze a Course Catalog CSV

In this example, we analyze a CSV file containing a small course catalog. The data has three columns: course name, number of lessons, and course level. The general analysis shows 7 rows and 3 columns, so the CSV should contain 21 values. It actually contains 20 values because the last row is missing the level field. The analysis also finds one empty value in the SQL lessons column. The value-length analysis then lists the shortest existing values, including the one-digit lesson counts, and the longest values, including the course level names.

course,lessons,level HTML,12,beginner SQL,,intermediate CSS,9,beginner Python,18,advanced Git,6,beginner Docker,10
General Information: -------------------- Rows: 7 (including header row) Columns: 3 Expected values: 21 (7 rows × 3 columns) Total values: 20 (including empty and whitespace-only values) Empty values: 1 (zero-length values and whitespace-only values) • row 3, column 2 Whitespace-only values: 0 Missing values: 1 • row 7, column 3 Value Lengths: -------------- Shortest non-empty values: • "9" — 1 character, row 4, column 2 • "6" — 1 character, row 6, column 2 • "12" — 2 characters, row 2, column 2 • "18" — 2 characters, row 5, column 2 • "10" — 2 characters, row 7, column 2 Longest non-empty values: • "intermediate" — 12 characters, row 3, column 3 • "beginner" — 8 characters, row 2, column 3 • "beginner" — 8 characters, row 4, column 3 • "advanced" — 8 characters, row 5, column 3 • "beginner" — 8 characters, row 6, column 3
Required options
These options will be used automatically if you select this example.
Character that separates CSV values.
Character that wraps quoted CSV fields.
CSV lines starting with this character are comments and are not analyzed.
Empty CSV lines are ignored and are not analyzed.
Treat the first CSV row as headers.
Print row, column, empty, and missing CSV value counts.
Print string, number, boolean, date, time, email, and URL counts.
Print shortest and longest non-empty CSV values.
Print statistics for selected CSV columns.
Specify column numbers or ranges. Examples: "2, -1" or "1-3".
Specify CSV header names to analyze, one per line.
If a CSV header repeats, analyze all matching columns.
click me

Analyze Greenhouse Sensor Columns

In this example, we inspect two columns from CSV-style greenhouse sensor data that uses semicolons as delimiters. We set the input delimiter to a semicolon, ignore the comment line and the empty line, skip the headers from the statistics, and analyze the "value" and "measured_at" columns by name. The analysis shows that the "value" column is a clean decimal column and gives its minimum, maximum, and average. In the "measured_at column", the analyzer checks that every time entry is present and written in the correct HH:MM format.

# greenhouse humidity sensor export sensor;value;measured_at;status H-01;48.5;08:30;normal H-02;72.1;08:45;high H-03;9.9;09:00;low H-04;55.0;09:15;normal
Column #2: ---------- First value: "value" Total values: 4 Empty values: 0 Whitespace-only values: 0 Missing values: 0 Values type: decimal Decimal values: 4 Minimum number: 9.9 Maximum number: 72.1 Average number: 46.375 Shortest value: "9.9" — 3 characters Longest value: "48.5" — 4 characters Column #3: ---------- First value: "measured_at" Total values: 4 Empty values: 0 Whitespace-only values: 0 Missing values: 0 Values type: time Time values: 4 (format: HH:MM) Shortest value: "08:30" — 5 characters Longest value: "08:30" — 5 characters
Required options
These options will be used automatically if you select this example.
Character that separates CSV values.
Character that wraps quoted CSV fields.
CSV lines starting with this character are comments and are not analyzed.
Empty CSV lines are ignored and are not analyzed.
Treat the first CSV row as headers.
Print row, column, empty, and missing CSV value counts.
Print string, number, boolean, date, time, email, and URL counts.
Print shortest and longest non-empty CSV values.
Print statistics for selected CSV columns.
Specify column numbers or ranges. Examples: "2, -1" or "1-3".
Specify CSV header names to analyze, one per line.
If a CSV header repeats, analyze all matching columns.

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/analyze-csv?input=book%2Cpages%2Cread%0ADune%2C412%2Ctrue%0AEmma%2C352%2Cfalse&input-delimiter=%252C&input-quote-char=%2522&comment-char=%2523&skip-empty-lines=true&skip-headers=false&print-general-info=true&print-value-types=true&print-value-lengths=false&print-column-analysis=false&use-column-number=true&column-number=1%252C2%252C3&use-column-name=false&column-name=name&insert-select-all=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 display detailed information about a CSV file.
Quickly make sure the given CSV file doesn't have errors.
Quickly run quick CSV-format tests and get a pass/fail report.
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.

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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