Check PDF File Size

Check PDF file size, page dimensions and what is making it large.

PDF Size Checker

Secure in-browser PDF engine — zero server uploads

Click to upload PDF document(s)Select one or multiple PDF files

Ad Space (auto) — Configurable via NEXT_PUBLIC_ADSENSE_CLIENT

What does PDF Size Checker do?

Analyse a PDF to see its file size, page count, average size per page and physical page dimensions, plus an indication of whether images or structure dominate the file. That tells you which compression approach will actually help.

How to Use PDF Size Checker

1
Upload the PDFAnalysis runs immediately.
2
Read the breakdownSize, pages and dimensions are shown together.
3
Follow the suggestionIt tells you whether compression is likely to help.

Key Features

Exact file size in both decimal and binary units
Average bytes per page, which reveals image-heavy documents
Page dimensions in points, millimetres and inches
Detection of mixed page sizes and orientations
Suggested compression approach based on what it finds

Frequently Asked Questions

Why is my PDF so large?

Nearly always embedded images. A page of text is a few kilobytes; a 300 DPI colour scan is 1–3 MB. If the average per page is above about 300 KB, images are the cause.

What is a reasonable size for a PDF?

Under 100 KB per page for text documents, and 200–500 KB per page for a good-quality scan. Much above that and there is room to compress.

What is the typical email attachment limit?

25 MB for Gmail and most providers, though some corporate systems cap at 10 MB. The tool compares your file against these common thresholds.

Why are page dimensions in points?

PDF measures in points, where 72 points is one inch. A4 is 595 × 842 points and US Letter is 612 × 792. Millimetres and inches are shown too.

100% Data Privacy

Your PDF is opened and rewritten by a JavaScript PDF engine running inside this page. The file never leaves your device, which matters for contracts, statements, medical records and ID scans.