Sheet Security Lab

Excel Encrypt

Password-protect Excel files online: upload, encrypt, and download.

Supports XLSX, XLS, XLSM, XLSB, XLAM, CSV. Max 30MB.

Upload Excel file

Click or drag to upload

Supports XLSX, XLS, XLSM, XLSB, XLAM, CSV. Max 30MB.

Password

For demo only: encryption is simulated client-side. Re-encrypt with desktop Office for strict security.

Supports XLSX/XLS/CSVMax 30MB

Status

Upload a file and set password to start encryption.

About this tool

Add a password to Excel files online. This is a front-end simulated encryption for quick demos; for strict security, re-encrypt with desktop Office or professional tools.

How to use

Upload the Excel file you need to protect.
Enter a password and click Encrypt.
Download the encrypted file; use a trusted local tool for stronger protection if needed.

Tip: Avoid using sensitive data in this demo. For production, handle files locally or with audited back-end services.