How to Compress a PDF on iPhone

Updated for 2026

Out of space to email a PDF from your iPhone? A browser compressor works in Safari with no app.

Quick answer: open a PDF compressor in Safari, add the file from Files or the share sheet, pick a level, and save the smaller result.
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Steps

  1. Open Safari and go to the compressor.
  2. Tap add file and choose from Files or your download.
  3. Pick Medium or High.
  4. Download and re-share.

FAQ

Will it ruin my photos in the PDF?

Images get lighter; text stays sharp. Very detailed scans soften a bit.

Where does the file go?

It processes on your iPhone, then you save it back to Files.