Lock it. Merge it. Split it. Watermark it. Convert it. PDF Seal gives you the essential PDF tools you need every day — with sensitive work handled on your device.
Your essential PDF toolkit, private by design.
PDF Seal gives you the five PDF tools you actually reach for — no bloat, no complex menus, just essential tools that work.
Add password protection to any PDF. Set the password once, and the document opens only for the people you give it to.
Runs on your deviceCombine several PDFs into one document. Put the pages in the order you want before you save.
Runs on your deviceSplit a file by page range, pull out only the pages you need, or break one document into several.
Runs on your devicePlace text or your logo across every page. Adjust size, opacity and position so it reads as a mark, not a mask.
Runs on your deviceConvert PDFs to Word, Excel, JPG or PNG. OCR turns scanned pages into text you can select and search.
Secure cloud processingPassword protection, merging, splitting and watermarking all run locally on your iPhone. Your contract, your tax return, your lease — none of those files are uploaded when you use these four tools.
Conversion and OCR need more processing power than a phone can spare, so those two send your file to a secure third‑party processing service. We don't store your files, and we keep no file history — there is nothing on our side to look up, sell or leak. For documents you'd rather not send anywhere, the on‑device tools are there for exactly that.
From contracts to research papers — PDF Seal is designed for the documents that matter in everyday life.
Protect & watermark
Merge & convert
Secure on‑device
Password protect
Split & extract
OCR & convert
Watermark & merge
PDF Seal is designed to be fast, private, and genuinely useful — with a focus on the documents you handle every day.
Local tools never upload your files
Essential tools that work instantly
Beautifully designed for iPhone
Use the tools as much as you need
Nothing stored, nothing to leak
We're here when you need us
Real feedback from people who use PDF Seal every day.
“PDF Seal is the only PDF app I need. The password protection and merging tools are fast and completely private — exactly what I was looking for.”
“I use PDF Seal for all my tax documents and leases. The on‑device processing gives me real peace of mind — nothing gets uploaded.”
“The watermark tool is surprisingly flexible — I can adjust size and opacity to get exactly the mark I want. Highly recommended.”
Lock it. Merge it. Split it. Watermark it. Convert it. Download PDF Seal today and get the essential PDF tools you need — private by design.