Features
Your CSV files never leave your computer.
No installation required. Works in any modern browser.
Compare original and repaired files before exporting.
Detect duplicate rows, empty columns, header issues, and more.
Choose encoding, delimiter, line endings, and quoting style.
Generate a detailed report of detected issues and applied fixes.
Compatible with Windows, macOS, Linux, Chrome, Edge, Firefox, and Safari.
No uploads, no account, no subscriptions.
CSV Repair & Cleanup Tool
Working with CSV files shouldn't mean spending hours hunting for formatting issues, fixing broken rows, or wondering why your file suddenly won't import into Excel or another application.
I built CSV Repair & Cleanup Tool because I wanted a simple way to inspect, repair, and clean problematic CSV files without relying on online services or complicated software. Everything runs directly in your browser, works completely offline after download, and lets you review every change before exporting the repaired file.
Whether you're preparing data for Excel, importing records into a database, cleaning CRM exports, or fixing CSV files from other applications, you can repair common problems in just a few clicks while keeping your data completely private.
What you can do
- Automatically detect common CSV problems
- Repair broken or inconsistent row structures
- Remove duplicate rows
- Remove empty rows and columns
- Fix duplicate or blank column headers
- Trim unnecessary whitespace
- Normalize column counts across all rows
- Preview every suggested repair before applying changes
- Compare the original and repaired files side by side
- Export repaired CSV files with customizable delimiter, encoding, line endings, and quoting options
- Generate a detailed repair report summarizing detected issues and applied fixes
Perfect for
- 💻Developers and software engineers
- 📊Data analysts and spreadsheet users
- 📈Small business owners working with CSV exports
- 🗂️Cleaning CRM, ecommerce, accounting, and database exports
- 📥Preparing CSV files for Excel, Google Sheets, databases, and import tools
- 🔒Anyone who wants to repair sensitive data without uploading files online
Why I made it
CSV files are deceptively simple, but once something goes wrong, fixing them can quickly become frustrating. A single malformed row, duplicate header, inconsistent delimiter, or invisible formatting issue can prevent an entire file from importing correctly.
Most online repair tools require uploading your data to someone else's servers. I wanted something different—a lightweight tool that keeps everything on your own computer. You stay in complete control, can preview every proposed repair before applying it, and never have to worry about your files leaving your device.
What you'll receive
Your purchase includes a standalone HTML application that runs in any modern web browser on Windows, macOS, or Linux, along with a sample CSV file for testing and a step-by-step guide to help you get started.
No installation is required, and once you've downloaded it, you can use it completely offline whenever you need to repair CSV files.
Gallery
A closer look at CSV Repair & Cleanup Tool.