#085 · PDF Compression & Optimization Tool

PDF File Size Analyzer

Inspect page count, bytes per page, metadata fields, and sampled rendering complexity in a local PDF analysis report.

PDF Tool

PDF to analyze
pages
Ad space

How to use this PDF tool

  1. Choose a supported pdf to analyze.
  2. Set the page range or quality options when relevant.
  3. Select Analyze File Size and wait for Complete.
  4. Review the statistics, then download the newly generated result.

What this tool does

Inspect page count, bytes per page, metadata fields, and sampled rendering complexity in a local PDF analysis report.

PDF.js reads document properties and samples page renderings; the tool calculates size-per-page metrics and exports them as JSON.

PDF internals share resources across pages, so bytes per page is an average rather than exact page storage.

Supported formats

Standard PDFs supported by PDF.js. Encrypted files that require a password are not processed.

Inputapplication/pdf,.pdf
ProcessingLocal browser session
Input limit250 MB; available memory may be lower

Tips for better results

  • Keep the original file until you have checked the result.
  • Close memory-heavy tabs before processing large documents.
  • Use a short page range for a quick test.
  • Signed or encrypted PDFs need special care.

FAQ

Can this show the exact file size of each PDF page?

No. PDF resources are often shared, so exact per-page storage is not separable; the report provides a useful average.

What does high bytes per page usually mean?

It often points to large images, embedded fonts, attachments, or inefficient object storage, but further inspection may be needed.

Does the analyzer change my PDF?

No. It reads the file locally and downloads a separate JSON report.

Can it identify every oversized image object?

No. This version samples rendered page complexity rather than enumerating every internal image stream.

Why might metadata be missing from the report?

Some PDFs omit standard metadata or store it in structures that PDF.js does not expose.

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Processing details

PrivacyLocal processing
ResultNew downloadable file
LimitsBrowser and format support

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