Sada Files
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Upload file

Add file from your device to get started

Drop your file here

Drag & drop, paste, or click to select file for Protect Office File.

Or drag and drop a file here

DOCXXLSXPPTX

Protect Office File online, free

Restrict editing of a Word document with a password (read-only protection; the file is not encrypted).

  • Runs in your browser — no upload
  • Free, no sign-up, no watermark
  • DOCX
  • XLSX
  • PPTX

How to use Protect Office File

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    Add your DOCX, XLSX and PPTX file

    Drop a file on the page, paste it, or click Select Files. Nothing is uploaded — it opens straight in your browser.

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    Fine-tune the settings

    The defaults already suit most files; change them only if you need to.

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    Run Protect Office File

    Press the start button. Processing happens on your device, usually in seconds.

  4. 4

    Download the result

    Save the finished file, or continue with another tool without downloading in between.

What Protect Office File can do

  • Private by design — files are processed in your browser and never uploaded
  • Free with no sign-up, no watermark and no daily limit

Protect Office File — frequently asked questions

Is Protect Office File really free?

Yes. Protect Office File is free forever on Sada Files — no ads, no premium tier, no watermark, no daily cap that pushes you to pay. Every option on this page is available to everyone.

Do I need to sign up or create an account?

No. There is no account system at Sada Files. Open the page, drop your file, pick your options and save the result. History and saved workflows stay on your device.

Is my file uploaded anywhere?

No. Protect Office File runs on your device — in your browser using WebAssembly, or inside the free native app. Your file never leaves your computer or phone, which is why there is no upload wait.

Which formats does Protect Office File accept?

Protect Office File accepts DOCX, XLSX and PPTX. Files are identified by their content, not their extension, so a mislabelled file still works.

Is there a file size or file count limit?

Only what your device can handle. Because processing happens locally there is no server cap, no queue and no "upgrade for larger files" message.

Can I chain Protect Office File with other tools?

Yes. After every result a Continue with… menu lists every tool that accepts this output, and the file is handed over in memory. Save the chain as a workflow and re-run it on hundreds of files, or call it in one API request.

Does Protect Office File work on my phone?

Yes. The web app works on Android and iOS browsers, and the free Sada Files app for Android, iOS, Windows, Linux and macOS runs Protect Office File fully offline.

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