PDF Info
About the PDF Info
The PDF Info tool reads a document's core technical details and displays them in a clean, easy-to-scan table: file name, file size, page count, page dimensions, and the standard metadata fields (Title, Author, Subject, Creator) along with creation and modification dates. This gives you a quick, complete snapshot of a PDF's underlying properties without needing to dig through a PDF viewer's separate properties dialog.
When you upload a file, the tool reads both the PDF's structural information (using PDF-lib) and renders its first page briefly (using PDF.js) to measure its exact dimensions in points, then assembles everything into a single readable table. This combination gives you details that aren't always easy to find in one place: exact page size (useful for confirming whether a document is Letter, A4, or a custom size before printing), file size (useful for checking against upload limits before submission), and the full set of metadata fields that describe the document's origin and content.
This is a handy first step whenever you're troubleshooting a PDF or need to quickly understand a file's characteristics before deciding what to do with it: checking a scanned document's page dimensions before deciding whether it needs cropping, confirming a file's size before attaching it to an email with a size limit, verifying who's listed as the Author and Creator on a document you didn't create yourself, or simply getting a quick overview of an unfamiliar file's basic properties before opening it further.
Because this tool only reads and displays information rather than modifying anything, it's a completely safe way to inspect any PDF without risk of altering its content. If you want to actually change any of the metadata fields you see here, the dedicated Metadata Editor tool lets you edit Title, Author, Subject, Creator, and Keywords directly, and if the file size itself is a concern, the PDF Compressor or PDF Optimizer tools can help reduce it.
It's a good habit to check this tool before sending a large document anywhere with a known size restriction, since the reported file size gives you a precise number to compare against an email provider's or upload portal's stated limit, rather than guessing based on your operating system's rough file size display. If you're troubleshooting why a document seems unusually large for its apparent content, comparing its reported size against the page count shown here can give you a rough sense of whether the bloat is likely coming from oversized embedded images (many pages, disproportionately large file size) versus something else in the file's internal structure.
Because this tool only reads information and never modifies your file, it's completely safe to run on any PDF you're curious about, including ones you don't fully trust the origin of — since no changes are made and nothing is uploaded anywhere, checking a file's basic properties here carries essentially no risk before you decide how to proceed with it further. If you're comparing several similar files to decide which is the most recent or complete version, running each one through this tool and comparing their reported modification dates and page counts side by side is often faster and more reliable than trying to judge by file name alone, especially when files have been renamed or copied between different folders over time.
Step-by-Step Instructions
- Upload your PDF into the drop zone.
- Wait while the tool reads the file's structure and renders its first page to measure dimensions.
- Review the resulting table showing file name, size, page count, page dimensions, and metadata fields.
- Use this information to decide on next steps — compressing, editing metadata, or cropping, for example.
Benefits & Use Cases
- Quickly reveals a PDF's core technical details in one view
- Shows exact page dimensions alongside file size and metadata
- Completely read-only — never modifies your file
- Useful first step before compressing, editing, or cropping
- Fast, no-upload inspection of any PDF
- Helps confirm file size before submission or email attachment limits