File Metadata Viewer
Inspect name, size, type, dates and embedded properties.
About File Metadata Viewer
Read everything the browser and the file itself can tell you: name, MIME type, exact byte size, last-modified date, plus format-specific properties such as image dimensions, PDF page count and author, or OpenXML document properties.
Files carry more than their contents. Names, timestamps, formats and embedded properties all travel with a document, and most of it is invisible until someone looks.
Read everything the browser and the file itself can tell you.
- Processed on your deviceEverything you open or type here is handled by this page and never uploaded anywhere.
- No queue, no limitsNothing waits on a server, so the only limit is your own hardware.
- No account neededNo sign-up and no email address required.
How File Metadata Viewer works in your browser
Two layers are reported separately, because they come from different places and have different reliability. The browser supplies the file name, its MIME type as the operating system reports it, the exact byte length and the last-modified timestamp.
The second layer comes from the bytes. The real format is identified from the file’s signature rather than its extension, and for known document types the embedded properties are read out of the container — author, application, creation and modification dates.
Where those two layers disagree is the interesting part. A file whose extension says one thing and whose signature says another is mislabelled, deliberately or otherwise, and that mismatch is exactly what an extension alone cannot show you.
When to use it
Checking what a document discloses before you send it on. Establishing when a file was really created or last altered. Confirming a file’s true type when the extension looks wrong. Finding out why a file was rejected by a system with a size or type limit.
Read more about this
Frequently asked questions
What can it tell me about a file?
Name, MIME type, exact byte size and last-modified date, plus format-specific properties such as image dimensions and PDF page count.
Does it work on any file type?
Basic properties are read for anything. Format-specific details appear for the types it recognises, such as images and PDFs.
Is the file uploaded to be inspected?
No. Everything is read from the file in your browser, which is why it works with no network connection at all.