Finance

Process financial statements and convert formats.

OFX to Excel QFX to Excel Excel to CSV CSV to Excel CSV Cleaner CSV Formatter Transaction Deduplicator Column Mapper PDF Statement to Excel Bank Statement Parser

Image Tools

Convert, edit, and optimize your images with ease.

JPG to PNG PNG to JPG JPG/PNG to WebP WebP to JPG/PNG HEIC to JPG Compress Image Crop Image Rotate & Flip Add Watermark Remove Background

PDF Tools

Convert, merge, split, and manage PDF documents.

JPG to PDF PDF to Image Merge PDF Split PDF Rotate PDF

Dev Tools

Developer utilities for everyday coding tasks.

Base64 Encode/Decode URL Encode/Decode JSON Formatter

Utility

Handy tools for quick everyday tasks.

Character Counter Web to Image / PDF

CSV Cleaner

Clean CSV files online free. Remove duplicates, fix headers, trim whitespace. No upload, browser-based CSV cleaner for finance data.

No upload required100% freeBrowser-based

Drag & drop CSV file here, or browse

Supports .csv files

✓ Runs in browser — no upload🔒 100% secure & private⚡ Instant processing

How to Use CSV Cleaner

Upload or drag & drop your CSV file onto the cleaner area.
Select the cleaning options: trim whitespace, remove empty rows, fix headers, and remove duplicates.
Review the preview and download your cleaned CSV file.

Features

Trim Whitespace - removes leading and trailing spaces from all cells automatically.
Remove Duplicates - eliminates exact duplicate rows or duplicates by a specific column.
Fix Headers - capitalizes header names and replaces underscores with spaces.
100% Private - all processing is done locally in your browser. Your data never leaves your device.

Why Use Our CSV Cleaner

Messy CSV data can wreak havoc on your spreadsheets and database imports. Whether you are cleaning financial transaction exports, CRM data dumps, or survey results, our CSV cleaner handles the tedious cleaning work in seconds. No more manually trimming cells, hunting for duplicates, or reformatting headers. With full control over which cleaning operations to apply and an instant preview, you can transform raw CSV files into clean, analysis-ready data without uploading anything to a server.

FAQs

How does the CSV cleaner work?

The CSV cleaner reads your file in the browser, parses it into rows and columns, then applies the selected cleaning operations - trimming whitespace, removing empty rows, fixing header formatting, and deduplicating rows. You can preview the changes before downloading.

Can I remove duplicates from specific columns?

Yes, when you enable the remove duplicates option, you can choose to match on all columns (exact row match) or select a specific column to deduplicate by. This is useful when you want to keep only the first occurrence of each unique value in a particular field.

Is my data secure?

Absolutely. All processing is done locally in your browser. Your CSV data never leaves your device, ensuring complete privacy and security for your sensitive information.