Is my CSV data secure?

Yes. Your files are processed securely and automatically deleted after 1 hour. We do not store or share your data with third parties.

What is the maximum file size?

We support CSV files up to 10MB. For larger files, consider using desktop software or splitting the file into smaller chunks.

Can I select specific columns for duplicate checking?

Yes. Our tool allows you to choose specific columns when removing duplicates. You can also choose case-sensitive or case-insensitive comparison.

CSV Cleaner

Upload, clean, and optimize CSV files instantly. Remove duplicates, empty rows, and fix formatting issues.

Upload CSV File

Drag & Drop Your CSV File

or click to browse

Supports CSV files up to 10MB

Remove Duplicate Rows

Eliminate identical rows from your CSV file.

Remove Empty Rows

Delete rows where all cells are empty or contain only whitespace.

Trim Whitespace

Remove leading and trailing spaces from all cells.

Remove Empty Columns

Delete columns where all cells are empty.

Duplicate Removal Settings

Case-sensitive comparison Compare all columns

Select columns to compare:

Remove Specific Columns

Select columns to delete from the CSV.

Keep Only Specific Columns

Remove all columns except selected ones.

Available columns will appear here after file upload

No File Processed Yet

Upload a CSV file and select cleaning options to see results here.

What is a CSV Cleaner Tool?

A CSV Cleaner is an essential utility for anyone working with data. CSV (Comma-Separated Values) files are widely used for data exchange between different applications, but they often contain formatting issues, duplicates, and inconsistencies that can disrupt analysis and processing.

Our CSV Cleaner tool helps you quickly prepare your data by removing common issues, ensuring your CSV files are clean, consistent, and ready for analysis, import into databases, or use in applications.

Common CSV Issues & Solutions

Duplicate Rows

Duplicate data can skew analysis results and waste storage space. Our tool identifies and removes identical rows while giving you control over comparison settings.

Empty Rows & Columns

Blank rows and columns can cause errors in data processing. We automatically detect and remove empty entries while preserving your meaningful data.

Whitespace Issues

Leading/trailing spaces can cause matching problems. Our trim feature ensures clean, consistent data by removing unnecessary whitespace from all cells.

When to Use a CSV Cleaner

1. Data Migration

When moving data between systems, CSV files often accumulate formatting issues. Cleaning ensures smooth imports without errors.

2. Data Analysis Preparation

Before analyzing data in Excel, Python (Pandas), R, or other tools, cleaning ensures accurate results by removing inconsistencies.

3. Database Imports

Database systems like MySQL, PostgreSQL, and SQL Server require clean CSV files for successful bulk imports.

4. CRM & Marketing Data

Clean contact lists and customer data before importing into CRM systems like Salesforce, HubSpot, or marketing platforms.

How CSV Cleaning Works

Step 1: Upload Your CSV

Upload any CSV file up to 10MB. Our tool automatically detects the delimiter (comma, semicolon, tab, pipe) and parses your data correctly.

Step 2: Select Cleaning Options

Choose from various cleaning operations: remove duplicates (with case-sensitive option), delete empty rows/columns, trim whitespace, or manage specific columns.

Step 3: Process & Download

Our tool processes your file instantly and provides a detailed summary of changes made. Download the cleaned CSV with one click.

Advanced CSV Cleaning Features

Column Management

Remove specific columns or keep only selected columns. Perfect for extracting relevant data from large datasets.

Custom Duplicate Detection

Choose specific columns for duplicate comparison. For example, check only email columns while ignoring other data.

Detailed Analytics

Get comprehensive statistics about your data before and after cleaning, including row counts, size reduction, and changes made.

Best Practices for CSV Files

Use consistent delimiters: Stick to one delimiter (usually comma) throughout your file
Quote fields with commas: Enclose fields containing commas in double quotes
Include headers: Use descriptive column headers in the first row
Check encoding: Use UTF-8 encoding for international characters
Validate data types: Ensure consistent data types within each column
Backup originals: Always keep a copy of your original data before cleaning

Frequently Asked Questions

What CSV formats are supported?

We support standard CSV files with comma, semicolon, tab, or pipe delimiters. Files can have quoted fields, newlines within quotes, and various encodings (UTF-8 recommended).

Is my data secure?

Yes. All uploaded files are processed securely and automatically deleted from our servers after 1 hour. We do not store, share, or analyze your data beyond the cleaning process.

Can I clean Excel files?

Our tool specifically handles CSV format. For Excel files (.xlsx, .xls), you can save them as CSV from Excel first, then upload them here for cleaning.

What happens to special characters?

We preserve all special characters and support UTF-8 encoding. If your CSV uses a different encoding, you may need to convert it to UTF-8 before uploading.

Can I undo changes?

We always provide a download of the cleaned file while keeping your original untouched. You can re-upload the original file if you need to make different cleaning choices.

Technical Specifications

Maximum file size: 10MB
Supported delimiters: Comma (,), Semicolon (;), Tab (\t), Pipe (|)
Character encoding: UTF-8 (recommended), also handles other encodings
Processing time: Typically under 1 second for files up to 10,000 rows
Output format: Standard CSV with comma delimiter and quoted fields when necessary
Data retention: Files automatically deleted after 1 hour