Need to combine documents before a meeting, on the train, or away from your desk? Open Safari, drop your PDFs into ModernPDF, and download the merged file. No app required, no files uploaded to any server.
Navigate to ModernPDF's Merge PDF tool on your iPhone.
Tap the upload area and select files from Files, iCloud Drive, or any connected storage. Add multiple documents.
Tap merge. Save the combined file to Files or share directly via AirDrop, Mail, or Messages.
ModernPDF runs in Safari using WebAssembly. Your iPhone handles the merge locally.
Skip the App Store. No installation, no storage used, no permissions granted.
After the initial page load, merging works without an internet connection.
The most common mobile merge scenario: you receive two separate documents that need to go out as one — a signed contract and its attachment, an invoice and a receipt, or multiple pages of a form that were scanned separately.
Most PDF merge apps on iOS require a subscription, show ads, or upload your files to process them remotely. ModernPDF avoids all three. It runs directly in Safari, processes files using your iPhone's chip, and produces the merged output without any network transfer.
For business users, this means merging confidential documents on a hotel Wi-Fi or airport network without worrying about data interception.
Combine offer letters, disclosures, and addendums into one package while at a showing or open house.
Merge proposals, contracts, and pricing sheets before a client meeting, directly from your phone.
Combine multiple assignment files into a single submission from your phone when you are away from your laptop.
Merge patient forms, referrals, and notes into one document from your phone between appointments.
Here is the specific iOS workflow for merging PDFs on iPhone:
1. Open Safari and go to modernpdf.app/tools/merge-pdf. Tip: add it to your Home Screen for one-tap access.
2. Tap the upload area. The iOS file picker appears — browse Files, iCloud Drive, or any connected service (Dropbox, Google Drive, OneDrive).
3. Select your first PDF. It appears in the merge queue with a page count indicator.
4. Tap 'Add more files' to add the second (and third, and fourth) PDF. Files appear in the queue in the order you added them.
5. Drag to reorder if needed. The merged file will follow this sequence.
6. Tap merge. Processing takes a few seconds on the A-series or M-series chip.
7. Tap download. iOS prompts you to save to Files or share directly. AirDrop it to your Mac, email it, or save it to iCloud for cross-device access.