PDF Info
Instantly inspect page count, file size, version, dimensions, forms, and encryption. Processed in your browser, files never upload anywhere.
How to Inspect a PDF File
Choose any PDF and the tool reports everything it can read within a second: the PDF version from the file header, the exact file size, the number of pages, the dimensions of the first ten pages in points, inches, and millimeters, how many interactive form fields exist, and whether the file is password protected. Everything is read locally in your browser, so even confidential documents are safe to inspect.
Click Choose a PDF file and select the document you want to inspect.
Wait a moment while the tool reads the file header and parses the document structure.
Review the report: version, size, page count, per-page dimensions, form field count, and encryption status.
Understanding the Report
The PDF version comes straight from the file's header bytes, for example %PDF-1.7, and tells you how modern the file format is. Page count and file size together give a per-page average that reveals bloat: text heavy pages cost kilobytes, while scanned or image heavy pages cost megabytes. Dimensions are reported per page because mixed sizes are common; a 612 by 792 point page is US Letter, 595 by 842 is A4, and anything wider than tall is landscape. The form field count answers "is this a real fillable form" at a glance, and the encryption line tells you immediately whether you will need a password before editing, signing, or filling the document with the other tools on this site.
Practical Uses
Use this before any other PDF task. Check encryption first so you do not waste time on a password protected file you cannot open. Check the form field count before filling, so you know whether the Fill PDF Forms tool will find anything to work with. Check dimensions before printing, because a US Letter file printed on A4 paper (or the reverse) scales slightly and can clip margins. Check the version when an old reader refuses to open a file: re-exporting or printing to PDF at version 1.4 usually restores compatibility. And check the size before emailing, since many mail servers reject attachments over 20 to 25 megabytes.
Privacy and Read Only Safety
Inspection never modifies your file. The tool reads the header bytes and parses a copy of the document in memory, then discards it; your original file on disk is untouched and no altered copy is created. Because parsing happens entirely in your browser with pdf-lib, sensitive contracts, financial statements, and personal records never cross the network. No upload, no storage, no logging, no account: pick a file, read the report, close the tab.
Frequently Asked Questions
How is the PDF version detected?
Every PDF file starts with a header like %PDF-1.7 in its first bytes, and this tool reads those bytes directly from your file to report the exact version. The version tells you which PDF features the file can use: 1.4 is the classic baseline, 1.5 added better compression, 1.6 and 1.7 added features like 3D and layers, and 2.0 is the modern ISO standard. Knowing the version helps when a file will not open in an older reader.
What do the page dimensions mean?
Dimensions are shown in points, inches, and millimeters. A point is 1/72 of an inch, so a US Letter page measures 612 by 792 points, which is 8.5 by 11 inches. The tool lists the first ten pages individually because PDFs can mix page sizes, for example a report with a wide landscape chart page among portrait text pages. If all pages share one size, every row shows the same dimensions.
How do I know if my PDF has fillable form fields?
The tool counts the interactive form fields embedded in the document and reports the number. A count above zero means the PDF is a real fillable form with text boxes, checkboxes, or dropdowns you can complete in a reader. A count of zero means the pages are flat content, even if they look like a form; those need annotation or OCR rather than form filling. Pair this with the Fill PDF Forms tool on this site when fields are present.
What does the encryption check tell me?
The tool tries to open the file normally, then reports whether the PDF requires a password. An encrypted PDF needs the user password before any tool on this site can process it, because browsers cannot bypass PDF encryption. The check also distinguishes a truly encrypted file from one that is merely damaged: damaged files fail with a parse error rather than an encryption error.
Why does the file size matter?
Size affects email attachment limits, upload forms, and load times. This tool shows the exact byte size alongside a human readable value, plus a per-page average that helps you spot bloat: a ten page text document should be well under a megabyte, while hundreds of kilobytes per page usually means large uncompressed images. If a file is too big to email, compressing images or re-exporting at lower resolution are the usual fixes.
Is my PDF uploaded to a server for this inspection?
No. The file header is read with the browser's FileReader API and the document structure is parsed with pdf-lib, all locally on your device. Nothing is transmitted, stored, or logged, and no account is required. Inspection is read only: the tool never modifies your file, it only reports what it finds.