Beyond "Remove Duplicates." Clean Data with Logic.
Add fuzzy matching (19.95 = 20.00), cross-file merging, regex extraction, and 10 smart retention rules. Process million-row files instantly in your browser.
Drop your messy files here
Multiple Excel/CSV files supported
Drop Your Files
Drag multiple Excel/CSV files
Set Smart Rules
Fuzzy match, merge, keep newest/max/min
Download Clean Data
Get merged, deduplicated results
Excel vs SheetCleaner
Excel Built-in | SheetCleaner | |
|---|---|---|
| Matching | Exact match only | Fuzzy + Regex + Normalization |
| Scope | Single file / sheet | Cross-file merge & dedupe |
| Duplicate Handling | Delete only | Keep / Merge / Aggregate rules |
Matching
Scope
Duplicate Handling
What Excel Can't Do, We Can
Advanced data cleaning features that go beyond Excel's built-in tools
100% Browser-Based
Your data never leaves your device. No uploads, no servers, no risk.
Fuzzy Value Matching
Match 19.95 with 20.00, or 'John Smith' with 'john smith'. Excel can't.
Cross-File Merge & Dedupe
Combine 5 Excel files and remove duplicates across all of them in one click.
10 Smart Strategies
Keep first, last, newest, oldest, max, min, merge, sum, average, or count.
Regex Pattern Matching
Extract 'Product-123' → '123' or match custom patterns per column.
Million-Row Performance
Process massive files without crashes. Free forever, no limits.
Data Security & Privacy
Complete local processing, zero uploads, 100% protection for your data privacy and security
Zero Server Dependency Security
Pure frontend architecture, no server storage, no data collection, fundamentally eliminating any possibility of data breaches
Local Browser Processing
All data processing happens locally in your browser, data never leaves your device, ensuring absolute privacy and security
No Network Transmission
File parsing and deduplication processing happen entirely locally, no uploads to any servers, eliminating data leak risks
Offline Available
Tool can be used offline after loading, process sensitive data with network disconnected, ensuring data stays in local environment
Instant Processing
Files are processed immediately after upload, no waiting required, data is cleared from memory instantly after processing, leaving no traces
Frequently Asked Questions
Everything you need to know about cleaning messy data
Excel's built-in tool only does exact matching. It can't handle fuzzy values (19.95 vs 20.00), cross-sheet deduplication, or smart retention rules like 'keep newest' or 'keep max value'. We provide 10 strategies that handle real-world messy data Excel simply can't.
100% safe. All processing happens in your browser using JavaScript. Your files never leave your device - no uploads, no servers, no cloud storage. You can even disconnect your internet and it still works. Verify it yourself in browser DevTools!
Fuzzy matching treats similar values as the same. For example: '19.95' matches '20.00' with tolerance, 'John Smith' matches 'john smith' (case + extra space), 'Product-123' matches just '123' via regex. This catches duplicates Excel misses.
Yes! Upload multiple files, we'll combine all sheets, align columns automatically, and deduplicate across the entire merged dataset. Perfect for combining customer lists from different sources.
No catch. Free forever, no limits on rows or files, no registration required. We don't even have servers to charge you for - everything runs in your browser. If you find it useful, you can buy us a coffee!
Stop Fighting with Messy Data
Merge multiple files, match fuzzy values, deduplicate across sheets. All in your browser, your data never leaves.
Rows Processed
Average Processing Time
Client-Side Processing