Who made this PDF, and how many pages does it really contain? The PDF File Information Viewer reads a file from your device and lists its basic properties. It is a viewer only, so it never changes your document.
Students, office staff, and researchers use it to check a download before sharing it. You get twelve facts in one small table.
Table of Contents
- What the Viewer Shows
- How to Use It, Step by Step
- How It Works
- Walkthrough: Checking a Lease
- How to Read the Results
- Encrypted and Damaged Files
- Limitations and Assumptions
- FAQs About the PDF File Information Viewer
What the Viewer Shows
The tool opens one PDF and fills a table with twelve rows. Nothing is edited, saved, or downloaded.
- File Name: the name of the file you picked.
- File Size: shown in KB with two decimals and comma grouping.
- PDF Version: read from the first line of the file, such as 1.7.
- Encryption: reads Yes (password protected) or No.
- Page Count: the number of pages in the document.
- Dimensions (Page 1): width and height of the first page, in points.
- Title, Author, Producer, and Creator Application: text stored inside the file. Each row shows N/A when the field is empty.
- Creation Date and Modification Date: shown in UTC, for example Mar 4, 2026, 09:15 UTC.
How to Use It, Step by Step
- Click the dashed box that reads "Drag & drop PDF to inspect file properties", or drop a PDF onto it.
- If you clicked, choose a PDF in the file picker that opens.
- Wait a moment while the results table appears below the box.
- Read each row from top to bottom.
- To check another file, click the box again or drop a new PDF.
The tool takes one PDF at a time. A file that is not a PDF gets the message "That file is not a PDF. Please choose a .pdf file."
How It Works
Your browser reads the file into memory. A library called pdf-lib then opens the document structure. It pulls out the page count, the first page size, four text fields, and two dates.
Click the Box or Drop a PDF→Browser Reads the File→pdf-lib Opens the Document→Table With Twelve Rows
The file size is the byte count divided by 1,024. Page size is measured in points, and 72 points equal one inch. The page 1 size is the visible area of the page, with any 90 or 270 degree rotation applied.
The code makes no upload request. The file stays on your device. The page does download the pdf-lib code from a public CDN, but your PDF is not sent anywhere.
Walkthrough: Checking a Lease
Priya Nair receives lease-draft.pdf from a property manager. She wants to confirm the page count and edit date before she signs. She drops the file on the box.
| Row | Example Value |
|---|
| File Name | lease-draft.pdf |
| File Size | 182.40 KB |
| PDF Version | 1.7 |
| Encryption | No |
| Page Count | 14 |
| Dimensions (Page 1) | 612.0 pt x 792.0 pt |
| Title | N/A |
| Producer | Microsoft Word |
| Creation Date | Mar 4, 2026, 09:15 UTC |
| Modification Date | Mar 6, 2026, 16:40 UTC |
Priya sees 14 pages on US Letter paper, which matches the cover email. The file changed two days after it was made, so she asks whether the terms moved. A blank Title row only means the author left that field empty.
How to Read the Results
The size 612.0 pt x 792.0 pt is US Letter, or 8.5 by 11 inches. A4 paper reads about 595.3 pt x 841.9 pt. Only page 1 is measured, so later pages may differ.
Producer names the software that wrote the PDF file. Creator Application names the program that made the original document, and the two often differ. Files without an info record show N/A for both.
These fields are plain text that anyone can edit. Treat them as hints, not proof of where a file came from. Dates appear in UTC, so they may differ from your local clock.
Encrypted and Damaged Files
A password-protected PDF still gets a partial table. It shows the name, size, version, "Yes (password protected)" for encryption, page count, and page size. Title, author, producer, creator, and both dates read "Unavailable (file is encrypted)".
A message explains that those fields cannot be read without the password. A damaged file shows "This PDF could not be read. It may be damaged or password protected. Nothing is shown." and the table is cleared.
To read the hidden fields, remove the password first with an unlock PDF tool.
Limitations and Assumptions
- Only the size of the first page is reported in the table.
- Fields stored only in XMP metadata are not read, so those rows may show N/A.
- Reports come from the file's own info fields, which may be blank or wrong.
- The tool cannot open an encrypted file or ask for a password.
- The tool keeps no copy, so you must pick the file again each visit.
Other tools fill gaps. The PDF metadata viewer and PDF version checker go deeper on those topics. To see paper sizes for every page, try the PDF page size detector.
If you need a quick page total only, the PDF page counter does that. To change the title or author, use the PDF metadata editor. More utilities live in the PDF tools hub.
FAQs About the PDF File Information Viewer
Does the PDF File Information Viewer upload my file?
No upload request appears in the code. The browser reads the file locally and then builds the table on the page.
Why do some rows say N/A?
The file has no value stored in that field. Many exported or scanned PDFs leave Title and Author blank.
Does it show the creation date and PDF version?
Yes. Both have their own rows, and the version comes from the file header. If the catalog names a different version, the row adds a note.
Why does it show only one page size?
The code measures page 1 only. A file with mixed paper sizes will not show that here.
Why does the table say Unavailable?
The file is encrypted, so its text fields stay locked without the password. Unlock a copy and load it again.
Can I edit the title or author here?
No. This viewer only reads the file and never saves a changed copy.
This tool runs in your web browser and may not handle every PDF file, font, or browser the same way. Keep a backup of your original file. Reviewed for general accuracy by Prof. Dr. Khalil Mudassar, PhD.