Metadata Viewer - Free Online PDF Tool

Inspect and edit document properties embedded in any PDF without uploading files. Load a file locally, then modify title, author, subject, keywords, and creator fields using built-in form controls. Read-only fields like creation dates and page counts appear for reference. Write your changes back with pdf-lib, then download the updated document. The entire workflow runs in the browser, keeping sensitive document metadata completely private and offline.

How to Use

  1. Select a PDF file using the input button
  2. Edit title, author, subject, or keywords in the displayed fields
  3. Review read-only information such as page count and dates
  4. Click Save Changes to apply edits to the document
  5. Download the modified PDF using the export button

Key Features

Frequently Asked Questions

Does this tool upload my PDF file to a server for processing?

No. All reading, editing, and exporting happens entirely inside your browser using JavaScript. The file never leaves your device, making it safe for confidential or sensitive documents.

Which PDF metadata fields can I actually change?

You can edit the title, author, subject, keywords, and creator fields. System-generated properties like creation date, modification date, page count, and PDF version are displayed for reference but cannot be overwritten.

Will editing metadata affect the visible content of my PDF?

No. Metadata changes only alter the hidden document properties used for search and organization. The visible text, images, and layout of your pages remain completely untouched and unchanged.

Can I undo my changes before exporting the PDF?

Yes. Use the Reset button to discard all edits and return to the original metadata values. You must click Export again to download the document after any changes are made.

Launch Metadata Viewer

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Maintained by Huang Bin · Last updated October 3, 2026

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