Inside PDF Master

The PDF Master home screen in dark mode: a button to open a PDF or images, recent files, and the Scan and Security tool groups.

The Merge screen with three PDFs and a photo listed in order, each with page and rotate options, above the button that merges them into one file.

The scanner reviewing a captured page: crop handles around the document, colour filters, brightness and contrast sliders, and the scanned pages in a row below.

A rental application PDF being filled in, with one form field selected and the on-screen keyboard open.

The Compress result: the file size before and after, the same page side by side, and options to try lighter or stronger compression before saving.

The Annotate screen: a lease agreement with highlighted lines, a hand-drawn underline and a circled passage, above pen width and colour controls.

The Pro screen: a row of Pro tools and the Lifetime, Monthly and Yearly plans, with a button to buy Pro.

About this app

PDF Master does the PDF jobs you would normally upload to a website, entirely on your phone. Your files never leave your phone. There is no upload, no account, no login and no ads. Every tool works in airplane mode.

Merge, split, compress, scan, sign, fill forms, protect and convert: pick your files, get a new file where you choose, and your original stays untouched.

Free, no limits

Merge: pick several PDFs and images
Split, Organize pages, Remove pages, Rotate
Images → PDF: pick many photos at once
Crop & resize
Open viewer, Bookmarks

Pro

Compress, Repair, Metadata
Scan and OCR: turn paper into clean, searchable PDFs
Protect, Unlock, Watermark, Redact
Sign, Fill forms, Create forms, Edit text, Page numbers
Pages per sheet, Compare, Read aloud
PDF → PowerPoint, PDF → Markdown, PDF → Images, HTML → PDF, Extract images
Batch (one tool on many files) and Chains (save a few steps as one tap)

Pro is one unlock with every Pro tool: Lifetime (pay once, includes every update), Monthly or Yearly. The price is on the first screen. No trial tricks, nothing hidden, and a 7-day refund. No daily, page or size limits on anything you paid for.

Built for trust

No all-files permission. You choose files with the system picker.
Output goes where you choose; the original is never overwritten.
If something goes wrong, the app says what happened and what to do.
Light, dark and your choice of accent colour.

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