FREE XLSX SHARING CHECK

Check Excel Hidden Sheets

Find hidden and very hidden worksheets before sharing an Excel file. CheckBefore processes standard scans locally in your browser.

PRIVATE SCAN WORKSPACE

Check a file before it leaves your hands.

Start with 2 free checks — no account needed.Original stays unchanged.

Processed locally

Choose a file or drop it hereBrowse from this device.xlsx · Maximum file size: 20MB · Processed locally

⌁ Your original stays on this device◌ No account needed for a free check

Choose a file or drop it here

What this tool checks

Hidden worksheets
Very hidden worksheets
Hidden rows and columns

How it works

Choose your file, review detected sharing risks, remove only items marked safe to remove, then verify the resulting copy before download.

Why check before sending?

Office and PDF files can retain information beyond what appears on screen. CheckBefore helps identify common risks without making absolute security guarantees.

FAQ

Is the file uploaded?

Standard scanning is performed locally in your browser whenever possible.

Does CheckBefore guarantee a file is safe?

No. A verification result means no removable risks were detected by the checks performed.