Is PDF Page Size Checker safe to use?

Yes, PDF Page Size Checker is completely safe. Unlike other tools that upload files to external servers, PDF Toolkit processes all files 100% locally in your web browser. Your private documents never leave your device.

Can I use PDF Page Size Checker offline?

Yes, once the website loads, all operations work completely offline. You can process your documents without an internet connection.

How do I check if my PDF is A4 or Letter size?

Simply drag and drop your PDF here. The tool immediately extracts the points viewport sizes and matches them to standard paper dimensions. If all pages are 210 × 297 mm, it will proudly declare it A4 size.

What does "mixed page sizes" mean in a PDF?

Mixed sizes indicate that the pages within the PDF document are not uniform. For example, a document might have Letter size pages for contents and an A3 or landscape sheet for diagrams. Our checker lists and flags each of these anomalies.

How is PDF page size measured in points vs millimetres?

PDF documents default to User Unit coordinates, where 1 point equals 1/72 of an inch. A millimetre represents approximately 2.835 points. The tool converts points to mm and inches using standard math ratios.

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📐 PDF Page Size Checker

Analyze and check the dimensions of each page inside a PDF. Instantly verify standard layouts or find mixed dimensions.

Your file never leaves your device. All processing happens locally in your browser.

How to Check PDF Page Dimensions & Paper Sizes Online

Instantly inspect exact page dimensions in millimeters, inches, and points, and detect standard paper formats (A4, Letter, Legal, Tabloid).

Upload PDF

Drag and drop your PDF file. The browser reads MediaBox and CropBox parameters directly in local RAM.

Inspect Sizes

View page-by-page dimensions with color-coded badges matching standard paper formats.

Detect Discrepancies

Instantly identify mixed orientations or non-standard sheets before sending to professional printers.

Export CSV

Download a complete dimensional report as a CSV spreadsheet for pre-press verification.

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100% In-RAM Print Preflight & Dimension Inspection

Verifying pre-press specifications for books, architecture plans, or contracts shouldn\'t require sending files to remote servers. All calculations happen inside your browser memory.

✓ 100% In-Browser Inspection✓ mm, Inches, & Points✓ Detects A4, Letter, Legal & Mixed✓ Export Dimensions as CSV

Frequently Asked Questions

Simply drop your PDF into the tool. The checker extracts the viewport dimensions and matches them to standard ISO 216 and ANSI paper sizes in millimeters and inches.

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