PDF Page Size Checker
Local Processing (Offline Capable)Check each PDF page's paper size in millimetres, detect A4/Letter standards, and flag mixed page sizes.
How this tool works (no sign-up needed)
- Upload your file above. Each tool shows whether it runs Local (in your browser) or Cloud (encrypted servers).
- Adjust options, then click the Run / Convert / Process button.
- Wait for progress, then download the result. Use Next tools to continue.
If buttons are not visible, enable JavaScript — the interactive workspace loads in your browser.
Free · Local processingYour file stays in your browser — nothing is uploaded
Supports application/pdf
Local — your file is processed in your browser and not uploaded to us. No account needed.
What is it?PDF Page Size Checker is a PDFLean local analysis tool: Check each PDF page's paper size in millimetres, detect A4/Letter standards, and flag mixed page sizes.
TL;DR: Check each PDF page's paper size in millimetres, detect A4/Letter standards, and flag mixed page sizes. Everything runs locally in your browser — your file is never uploaded; matching uses a 2pt tolerance and non-standard sizes are labeled Custom.
About this tool
This tool does one job and does it entirely on your device. Check each PDF page's paper size in millimetres, detect A4/Letter standards, and flag mixed page sizes. Processing runs locally in your browser's memory — the document is never transmitted, and closing the tab clears it completely. The workflow is deliberately short: load the file, choose the options on the page, run the operation, and save the result. Every choice is applied before the file is written, so re-running with different settings takes seconds. Practical limits apply (see the on-page limits); it pairs well with the related tools linked beside this page when one step is not the whole job. Key facts — Processing: runs entirely in your browser, client-side; Access: free with no account required; File limits: see the on-page limits; Privacy: the file never leaves the device.
How to use
Choose a PDF file
Click Inspect
Review each page size and whether they match
FAQ
Will my file be uploaded?
No. Everything runs locally in your browser — your file is never uploaded.
Are there any limits?
Matching uses a 2pt tolerance; non-standard sizes are labeled Custom.
How are standard paper sizes matched?
The tool reads each page's MediaBox dimensions in millimeters and matches them with a 2pt tolerance against standard formats like A0–A6, B4/B5, Letter, Legal, Tabloid, and Executive; unmatched sizes are labeled as Custom.
Can I process multiple files in bulk?
A single tool page handles one task at a time; for bulk work use the Batch Processing workflow and add this tool as a step to run a whole set at once.
Is the processed file still editable?
This tool is a read-only analyzer that displays paper dimensions without modifying your PDF; you can also export the inspection report as JSON for record-keeping, and your original document remains completely untouched.