Compress PDF on iPhone or Android without an app. Free browser-based PDF compression on any mobile device. No download required.

You don't need an app to compress PDFs on your phone. PDF HUB 24 works in Safari on iPhone and Chrome on Android — open the site, upload your PDF, download the compressed version. Done in under a minute. ## How to Compress PDF on iPhone 1. Open **Safari** and go to pdfhub24.com/compress-pdf 2. Tap **Upload PDF** 3. Your Files app opens — navigate to your PDF (iCloud Drive, On My iPhone, or from apps like Mail) 4. Select your PDF 5. Choose compression level and tap **Compress** 6. When complete, tap **Download** 7. Tap **Save to Files** to save to iCloud Drive or On My iPhone **Finding PDFs on iPhone:** Email attachments → long-press the attachment → Save to Files. Downloads from Safari are in Files → Downloads. PDFs from WhatsApp are in Files → WhatsApp. ## How to Compress PDF on Android 1. Open **Chrome** and go to pdfhub24.com/compress-pdf 2. Tap **Upload PDF** 3. Browse to your PDF — check Downloads, Google Drive, or your file manager 4. Select your PDF and tap Open 5. Choose compression level and tap **Compress** 6. The compressed PDF downloads to your **Downloads folder** 7. Access it from the Chrome notification bar or your Files app ## Which Compression Level for Mobile Use? **Sharing via WhatsApp or Telegram:** Medium compression — reduces most files to under 10MB, which loads fast on mobile data. **Emailing from phone:** Medium compression — keeps files under Gmail's 25MB limit and loads quickly for the recipient. **Portal uploads:** High compression — if you're uploading to a government or job portal with strict size limits. **Saving to phone storage:** Low or Medium — keeps quality high for documents you'll reference later. ## Common Mobile Scenarios **Bank statement from banking app:** Downloaded as a PDF, often 2–5MB. Medium compression gets it to 300–800KB — small enough for any email or portal upload. **Scanned document from phone camera:** Apps like CamScanner or Notes (iPhone) export as PDF. These can be large (5–20MB per page). High compression brings most single-page scans to under 200KB. **PDF received in WhatsApp:** Save to Files first, then compress and re-share. No app download, no account, no storage used on your phone beyond the final compressed file.