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PzPDFzy

PDF Resolution Optimizer

Take manual control of the DPI and JPEG quality used to rebuild your PDF.

Drop your file here

Nothing is uploaded — your file is processed on this device.

Options for PDF Resolution Optimizer

Higher numbers look sharper and create larger files.

Compression works by re-rendering each page as an optimised image, which reliably shrinks scans and image-heavy files. Text stops being selectable in the result — use Optimize PDF when you need to keep the text layer.

How to pdf resolution optimizer

  1. 1Upload the PDF.
  2. 2Set the resolution and quality.
  3. 3Run it and compare the size report.

About this tool

Scanners often default to 600 DPI, which is far more detail than anyone needs to read a letter on screen and produces files several times larger than necessary. This tool lets you pick the resolution deliberately instead of accepting a preset.

As a rule of thumb: 96 DPI is comfortable for on-screen reading, 150 DPI is the sweet spot for documents that might be printed casually, 200–300 DPI is right for archival or OCR work. Pair the DPI with a quality percentage to fine-tune the balance, and the size report tells you what each choice cost.

What it's good for

  • Normalising a batch of over-scanned documents to 150 DPI.
  • Preparing a document for OCR at a known resolution.
  • Matching a specification that requires a particular DPI.
  • Trading a little sharpness for a much smaller archive.

Features

  • Exact DPI

    Anything from 60 to 400 DPI.

  • Quality slider

    Independent control over compression strength.

  • Size comparison

    Before and after sizes are shown together.

  • Repeatable

    The same settings give the same result every time.

Questions people ask

Which DPI should I choose?
150 for general use, 96 for screen-only reading, 300 for print or OCR.
Does higher DPI improve a low-quality scan?
No — it cannot add detail that was never captured, only file size.
Is text still selectable?
No, pages are re-rendered as images.

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