Merge Excel & CSV Files Online

Combine multiple spreadsheets into one file. Works with Excel (.xlsx, .xls) and CSV. 100% private — runs directly in your browser.

Download merged.xlsx

Why Use SafeMerge?

No Uploads
Your files never leave your device. Everything happens inside your browser.
Supports Excel & CSV
Merge .xlsx, .xls and .csv files in seconds.
Unlimited Free
No limits, no registration, no watermarks.
Fast
Instant merging using modern browser technology.

Safe & Secure

SafeMerge processes your spreadsheets entirely on your computer using JavaScript. Your data is never uploaded to any server, ensuring maximum privacy and compliance with GDPR and corporate security standards.

Frequently Asked Questions

Can I merge CSV files?
Yes. SafeMerge supports both CSV and Excel files.
Is this really free?
Yes. There are no limits or paid plans.
Are my files uploaded?
No. Everything runs locally in your browser.
Do I need to install anything?
No. Just open this page and merge.