Free Online Tool
Split CSV & Excel Files Online - Free File Splitter
Upload large CSV or Excel spreadsheets and split them into smaller, manageable files instantly. All processing happens locally in your browser—your files never leave your computer. Automatic header preservation, configurable row limits, and 100% free.
Upload & Split
Upload one CSV/XLS(X) file, pick the max rows per slice, and instantly download perfectly chunked copies with maintained headers. All processing happens in your browser—your files never leave your computer.
Drag & drop your CSV or Excel file here
Supports CSV, XLS, and XLSX formats • Max 100MB • Processed locally
🔒 Privacy First: All file processing happens locally in your browser. Your files never leave your computer. Maximum file size: 100MB.
File summary
NO FILENo file selected yet.
Maximum 100,000 rows per file; we count the header row toward this limit, so a 25,000 cap means the header plus 24,999 data rows per split.
Auto-numbered chunks: filename-01, filename-02, etc.
Split Results
Download each chunk individually with the exact headers copied from your original file.
No splits to show yet. Run the splitter to see results here.
Build cleaner automations with Switch Labs
Replace ad-hoc macros and risky copy/paste workflows with an internal-grade splitter that gives every team a repeatable, audit-friendly process for distributing data sets.
Header-perfect slices
We clone the exact header row into every chunk, so downstream imports never lose column order or naming conventions.
CSV & Excel ready
Upload CSV, XLS, or XLSX workbooks and download the split output in the same format—no manual conversions required.
Row guardrails
Pick a max row count per file, we enforce it, surface totals, and show you exactly how many chunks were created.
100% Private & Secure
All processing happens locally in your browser. Your files never leave your computer—no uploads, no servers, no privacy concerns.