Office Document Structure Check
Know whether a Word, Excel, or PowerPoint file is genuinely intact before you trust it.
Office Document Structure Check
A .docx/.xlsx/.pptx is a ZIP of XML parts. This verifies the package opens and contains the parts an office app needs.
Report
The structure report appears here.
When to use this
Modern Office files are ZIP archives of XML. They break in two ways: the ZIP wrapper is damaged (file won’t open at all), or specific internal parts are missing (app opens it then reports corruption). This check catches both — useful after a failed save, a sync error, or a file that “opens on one computer but not another.”
Worked example
A colleague’s report.docx shows “Word found unreadable content.” You drop it in: the ZIP signature is present butword/document.xml is missing, so the tool tells you the core part is gone — the file is genuinely corrupt, not just a stale preview. You ask for a fresh copy instead of fighting it.
What it can and can’t do
It confirms the package is a valid ZIP and contains the parts an Office app expects. It does not validate the XML inside those parts or repair anything — a file can pass this check and still have malformed content. For true recovery, a desktop Office install’s “Open and Repair” is the next step. The check is a fast, private triage.
FAQ
Why does it search for “word/document.xml”? That file holds the actual text of a .docx. If it is absent the document is empty or broken even if the wrapper opens.
It passed but Office still complains. Then the ZIP and parts exist but the XML is malformed. Use Office’s built-in Open and Repair, or re-save from the original author.
Is the file uploaded? No. Everything runs locally in your browser.