Free Online Excel & CSV Cleaning Suite
Instantly remove duplicate rows, clean empty columns & rows, trim extra spaces, and format dates in your Excel and CSV files. 100% Free & In-Browser Privacy.
Key Capabilities of Home
Zero Server Uploads
Files are processed strictly in your local browser RAM. No servers or third-party clouds.
Instant Side-by-Side Live Preview
See every removed row, trimmed space, and standardized cell with real-time audit logs.
Multi-Tool Cleaning Suite
Duplicates, blank rows, empty columns, whitespace, date formatting, and title casing.
Offline PWA Support
Install and use without internet access anywhere on desktop and mobile devices.
How to Home in 3 Simple Steps
Select a Dedicated Tool
Pick Duplicates, Blank Rows, Blank Columns, Trim Spaces, or the All-in-One Suite.
Review Cleaned Data
Examine before-and-after audit logs and cell highlights directly on your screen.
Export Pristine File
Download cleaned Excel (.xlsx) or CSV (.csv) file ready for database or reporting.
Frequently Asked Questions
Does Spreadsheet Fixer upload my files to any cloud or external server?
No. Spreadsheet Fixer is 100% client-side. Your Excel and CSV files are parsed and cleaned directly inside your browser memory (RAM) using modern JavaScript and Web Workers.
How does client-side duplicate removal work?
The engine hashes and compares row cells using deterministic string algorithms within a background Web Worker. It identifies exact duplicates or whitespace-padded duplicates instantly.