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The Hidden Metadata in Word, Excel and PowerPoint Files

By · · updated August 26, 2026 · 3 min read

Word, Excel and PowerPoint files store hidden metadata in two XML parts inside the file — docProps/core.xml and docProps/app.xml — including the author, the company, the name of everyone who last saved it, the revision count, total editing time, and the application version. Documents can also hide comments, tracked changes, speaker notes and hidden slides in the body. None of it shows when you open the file normally, yet it travels with every copy you send. Here’s what’s there and how to check it.

This guide lists what Office files hide and shows how to read it with the Office metadata extractor.

Where the metadata lives

Modern Office files (.docx, .xlsx, .pptx) are ZIP archives of XML. Rename one to .zip, open it, and two files hold the document properties:

  • docProps/core.xml — the core fields: title, subject, creator (author), last modified by, keywords, category, and created / modified timestamps.
  • docProps/app.xml — application data: the program and version, company, manager, total editing time, revision number, and counts of pages, words, slides or hidden slides.

What this can reveal

  • Every author, not just the current one. The “last modified by” field names whoever last saved the file — often revealing that a document sent from one person was actually written by another.
  • Your organisation. The company and manager fields are filled automatically from the Office installation.
  • How long you spent and how many drafts. Total editing time and revision count can contradict a claimed timeline.
  • Content you thought was removed. Comments, tracked changes, hidden columns, hidden slides and speaker notes stay in the file unless explicitly deleted — a frequent source of embarrassing leaks.

The speaker-notes and hidden-slide trap

PowerPoint is a special risk: speaker notes and hidden slides are part of the file, not stripped when you present or share it. A deck sent to a client can carry internal pricing notes or backup slides the sender forgot were there. If you only need the visible text of a deck, the PowerPoint text extractor pulls it out — including notes — so you can see exactly what a .pptx is carrying.

How to check before you share

  1. Read the metadata. Open the file in the Office metadata extractor to see the core and app fields, in your browser, without uploading.
  2. Use Office’s own inspector. In Word/Excel/PowerPoint, File → Info → Check for Issues → Inspect Document finds comments, tracked changes, hidden content and personal data, and can remove them.
  3. Re-check after cleaning to confirm the author and company fields are actually cleared.

Frequently asked questions

What hidden metadata do Office files contain?
Author, company, the name of whoever last saved the file, revision count, total editing time, and the app version — plus comments, tracked changes, hidden slides and speaker notes in the body.

Where is metadata stored in a Word or Excel file?
In two XML parts inside the file (which is a ZIP): docProps/core.xml and docProps/app.xml.

Does PowerPoint keep speaker notes and hidden slides when I share a deck?
Yes. They remain in the .pptx file unless you remove them, so a shared deck can carry internal notes and backup slides.

How do I see who really wrote a document?
Check the creator and “last modified by” fields in the file’s metadata — an Office metadata extractor shows both.

How do I remove hidden metadata from an Office file?
Use the built-in Document Inspector (File → Info → Check for Issues → Inspect Document), then re-check the fields are cleared.

Last updated: 16 August 2026.

About Abrar

Abrar builds EasyExtract's free, browser-based extraction tools and writes these guides on getting data out of files — PDFs, spreadsheets, images, archives and Office documents. Every tool runs entirely in your browser, so nothing you open is ever uploaded.

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