UlvixorPDF Metadata Viewer
Select a PDF file and instantly see its title, author, subject, keywords, producer, creator, creation and modification dates, and page count. The file is processed locally with pdf-lib and never uploaded to any server.
How it works
- Select a PDF file from your device using the file picker.
- Your browser reads the file as binary data, and pdf-lib extracts the document information (the document info dictionary).
- The title, author, subject, keywords, producer, creator, dates, and total page count are displayed.
- If the PDF is corrupted or not a valid file, a clear error message is shown instead of incorrect data.
Use cases
- Verify who authored a PDF or which tool generated it before reusing it.
- Check the actual creation date or last-modified date of a document.
- Quickly audit the metadata of PDFs received from third parties before sharing them.
- Check whether a PDF retains sensitive metadata (author, software used) before publishing it.
Use cases
- Verify who authored a PDF or which tool generated it before reusing it.
- Check the actual creation date or last-modified date of a document.
- Quickly audit the metadata of PDFs received from third parties before sharing them.
- Check whether a PDF retains sensitive metadata (author, software used) before publishing it.
Common mistakes
- Expecting to be able to change the PDF's author, title, or keywords from this tool.This tool only reads and displays existing metadata; it doesn't modify it. To edit it, you need another tool such as Adobe Acrobat or your own script with pdf-lib.
- Assuming the 'title' shown in the metadata is the same text that appears visually on the document's cover page.The metadata title is a separate internal field that the author or export tool can leave different (or empty) from the visible text on the page. Check both if you need to confirm the real title.
- Uploading a password-protected PDF expecting to see all its metadata without issue.The tool attempts to read metadata even from encrypted PDFs, but some fields may not be available if the file requires a password to fully open.
Frequently asked questions
No. The file is read and processed entirely in your browser using the pdf-lib library. It is never sent to an external server or stored anywhere.
The tool attempts to read metadata even from encrypted or protected PDFs, bypassing the protection only for that purpose. However, it doesn't support extracting content from encrypted PDFs: if the file requires a password to fully open, some fields may not be available.
An error message is shown indicating the file couldn't be read, instead of displaying incorrect or incomplete information.
Not every PDF includes all possible metadata. Many PDF-generation tools leave fields like subject or keywords empty, which is normal and doesn't indicate an error.
No, this tool is read-only. It's designed for quickly inspecting a PDF's metadata, not modifying it.
Alternatives
You can also see basic PDF metadata by right-clicking → Properties in Windows Explorer, or opening File → Document Properties in Adobe Acrobat Reader, which also lets you edit them. This tool's advantage is not needing to install any PDF reader: you select the file and see the metadata instantly, without it leaving your device.