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Free PDF tool

Compress PDF

Reduce PDF file size with balanced or strong local compression.

Local PDF workspace

Compress PDF

Reduce PDF size locally with honest size reporting.

Drop PDF files here or choose files from your device One file at a time. Maximum total size: 50 MB.
Selected files0 files

Your selected files will appear here.

Tool options

72%

Strong mode: may reduce visual quality and removes selectable text.

Nothing is uploaded

Privacy: Your files are processed inside this browser tab. This tool does not upload or store them on Trezonic.

How to use Compress PDF

  1. Choose one PDF file.
  2. Select Balanced or Strong mode and adjust image quality when needed.
  3. Compress, compare the sizes, preview, and download the valid output.

Balanced compression rewrites the document efficiently. Strong compression renders pages as optimized images for smaller files, which can reduce quality and remove selectable text.

Private by design

The built-in engine processes selected files inside this browser tab. Trezonic does not upload or store them. If you arrived from the PDF Hub, its temporary on-device handoff is deleted as soon as this tool reads it.

Helpful answers

Compress PDF FAQ

Why can the reduction be small?

A PDF that already uses efficient image and stream compression may have little removable overhead.

What does Strong mode change?

It rasterizes pages, which can reduce size but also removes selectable text and may lower visual quality.