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Compress PDF Files on iPhone & iPad

The fastest way to compress PDF files on your iPhone or iPad. No uploads, no accounts, no hassle.

  • Shrink PDF size without losing quality
  • Four compression levels to choose from
  • Process multiple files in one batch
Download BossPDF — Free
4.8
App Store | Free to try
4.8 on App Store
No uploads ever
Works offline
Privacy-first
No account needed
Quick Answer

To compress PDF files on iPhone, download BossPDF from the App Store, tap Compress, select your files, and you're done. It works offline and takes seconds.

How to compress pdf on iphone

  1. 1

    Open BossPDF

    Launch the app and tap "Compress" from the home screen.

  2. 2

    Select your PDF

    Choose one or more PDFs from Files or any app.

  3. 3

    Choose compression level

    Pick Light, Medium, High, or Maximum depending on your needs.

  4. 4

    Tap Compress

    Hit compress and watch the file size drop in seconds.

  5. 5

    Save or share

    Save the smaller file or share it directly via email or messaging.

Ready to try it?

Get BossPDF — Free on the App Store

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Why this matters

Compressing PDF files shouldn't require a computer, a subscription, or uploading sensitive documents to a server. Whether you're on a commute, in a meeting, or working from the couch — you need a tool that just works, right on your phone.

Why BossPDF

  • Four compression levels: Light, Medium, High, Maximum
  • Batch compress multiple PDFs at once
  • Preview quality before saving
  • All processing happens on your device — files stay private
  • Fast compression even for large documents

How people use BossPDF

Student

Shrinking a thesis PDF to meet the university's upload size limit.

Freelancer

Compressing a portfolio PDF to email to a potential client.

Remote Worker

Reducing presentation size to share on Slack without hitting limits.

Job Seeker

Getting a resume PDF under 1MB for an online application portal.

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Frequently asked questions

How do I compress PDF files on my iPhone?

Download BossPDF from the App Store, open the app, tap "Compress", select your files, and tap the action button. Your compressed PDF is ready in seconds.

Is BossPDF free to use for compressing PDFs?

Yes, you can try every feature free. BossPDF offers a free trial with no watermarks. Pro plans start at $4.99/week for unlimited access.

Can I compress PDFs offline with BossPDF?

Yes. BossPDF processes everything on your device. No internet connection needed, and your files are never uploaded to any server.

Does BossPDF work on iPad?

Yes. BossPDF is optimized for both iPhone and iPad, with full support for Apple Pencil and the larger screen.

Can I compress multiple PDFs at once?

Yes. BossPDF supports batch processing — select multiple files and process them all in a single tap.

Fast. Simple. Done.

Stop fighting with PDF tools. Download BossPDF and get it done in seconds.

Download on App Store
Download BossPDF — Free