Edit CSV files online for free.
Open any CSV file in your browser, edit cells, sort columns, filter rows, find and replace values, and export the result — no uploads, no sign-ups.
How it works
Three simple steps
Open your CSV
Drag and drop a CSV file or paste data to load it into the editor instantly.
Edit and clean
Click cells to edit, sort columns, filter rows, find and replace, and trim whitespace.
Export
Download your edited file as CSV, Excel, or JSON when you're done.
Key features
Everything you need
Inline cell editing
Click any cell to edit its value directly in the spreadsheet grid.
Find and replace
Search across all columns and replace values in bulk with one click.
Sort and filter
Sort any column ascending or descending and filter rows by value.
Column transforms
Apply formulas and transformations to entire columns at once.
Data cleaning
Trim whitespace, remove empty rows, and deduplicate records automatically.
Multi-format export
Export your edited data as CSV, XLSX, or JSON.
Your data stays on your device
SheetTool processes everything locally in your browser. Your files are never uploaded to a server. No account required.
FAQ
Frequently asked questions
Is this CSV editor really free?
Yes. SheetTool is completely free to use. There are no premium tiers, no usage limits, and no sign-up required.
Can I edit large CSV files?
Yes. Since everything runs in your browser, performance depends on your device. Most files with tens of thousands of rows work smoothly.
Is my data safe when I edit CSV files online?
Your files never leave your device. SheetTool processes everything locally in the browser — no server uploads.
Can I export my edited CSV as Excel?
Yes. After editing, you can export your data as CSV, XLSX, or JSON using the export menu.
Ready to get started?
Open SheetTool and start working with your files right away. No sign-up needed.