Why Use Our Excel Lock Tool?
Password Protection
Lock Excel files with strong passwords — prevent unauthorized access to sensitive data
Read-Only & Edit Passwords
Set separate passwords for opening and modifying — users can view without edit access
AES Encryption
Industry-standard AES 128-bit and 256-bit encryption to protect your Excel files
Granular Protection
Lock specific actions — prevent inserting rows, deleting columns, sorting, filtering, and more
Workbook Protection
Protect workbook structure and windows to prevent sheet rearrangement
Batch Lock
Lock multiple Excel files at once — coming soon
100% Private
Lock Excel files completely in your browser. Your files and passwords never leave your device
Completely Free
No signup, no watermark, no limits — use our Excel lock tool as much as you need
How to Lock Excel File — 3 Simple Steps
1. Upload Your Excel File
2. Set Password & Options
3. Download Locked File
When You Need to Lock Excel Files
- Financial Data Protection
- Lock Excel files containing sensitive financial information, budgets, and forecasts
- Employee Records
- Protect HR files with employee personal information and salary data
- Client Data
- Secure client lists, contact information, and confidential business data
- Intellectual Property
- Protect proprietary formulas, algorithms, and business processes in Excel
- Legal Documents
- Lock legal agreements, contracts, and compliance documents stored in Excel
- Read-Only Distribution
- Share Excel files with clients or colleagues who should view but not edit
Why Use Our Excel Lock Tool?
Most online Excel lock tools upload your files to servers — security risk for sensitive data. Our tool works entirely in your browser: faster, safer, and completely private. Lock Excel files with AES encryption, dual passwords, and granular protection options.
100% Private
Your files and passwords never leave your device. Lock Excel files safely
AES Encryption
Industry-standard 128-bit and 256-bit encryption
Dual Passwords
Separate passwords for opening and modifying files
Granular Protection
Lock specific actions — insert, delete, sort, filter, and more
Workbook Protection
Protect workbook structure and windows
Password Strength Checker
Real-time feedback on password security
No Installation
Works in your browser — no software to download
Free Forever
No signup, no watermark, no limits — completely free to use