StealthPDF is honest desktop software for Windows. Scan, compress, sign, OCR, and unlock PDFs right on your own computer. Nothing gets uploaded, nothing gets tracked, and there's no account to make.
Everything below comes in the one app. There's no "pro" tier and nothing to unlock later.
Pull pages straight from any WIA or TWAIN scanner Windows can see, including old 32-bit drivers most apps have dropped.
Shrink heavy scans while text and vector art stay sharp. You pick the DPI, quality, and grayscale.
Draw a signature, drop in an image, or sign with a certificate. Add page numbers and watermarks too.
Clear owner-password locks on files you own, then save a clean copy you can actually edit.
Turn a scanned page into text you can search, select, and copy. Runs on Tesseract, fully offline.
Combine PDFs, images, or whole folders into one file. Reorder, insert, or pull pages out just as easily.
Add text, highlights, ink, shapes, and whiteout. Full colour picker, plus move, resize, and undo.
Type into real PDF form fields, tick boxes, choose options, and save your answers into the file.
Trim margins, rotate, flip, and scale. Straighten a crooked scan by drawing a line along the horizon.
A real print dialog with live preview: scale, margins, pages per sheet, duplex, and colour at 300 DPI.
Read one page at a time, scroll continuously, view spreads, or scan a grid. Tabs and full-screen included.
The app speaks English, Spanish, Chinese, Bengali, Turkish, German, French, and Nepali. OCR handles 100+ languages.
Light and dark themes, a toolbar you can rearrange, and a sidebar you can resize. It looks like a proper Windows app because it is one.
The code is free and open. The $9.99 is for a ready-to-run build, and it keeps the project going.
Would rather compile it from source? Go for it, honestly.
It's GPL-3.0, so every line is yours to read and build. Just know what the afternoon looks like: you'll need Visual Studio and the .NET Framework 4.8 toolchain, some patience with dependencies, and you're on your own for updates and code-signing. Until you sign it yourself, Windows will warn people before it opens.
git clone …/StealthPDF
msbuild /p:Configuration=Release
You don't have to. The code is free under GPL-3.0, and anyone can clone and build it. The $9.99 gets you a signed, ready-to-run installer that updates itself, so you skip the whole build-and-maintain routine. It also pays for the time that goes into keeping the app alive.
Really. Your documents are never sent anywhere. There's no telemetry and no cloud processing. The one time it touches the network is to check for a new version, and you can turn that off. Your PDFs stay on your disk, full stop.
For now it's Windows only (10 and 11, 64-bit). Mac and Linux versions are on the roadmap. Watch the GitHub repo if you want to know when they land.
Yes, on files you're allowed to. StealthPDF clears owner-password locks (the ones that block printing, copying, or editing) without the password. If a file is sealed with a user password, you enter it once and then you can save a decrypted copy.
Email us within 14 days and we'll refund you in full, no interrogation. We'd rather you have your money back than a tool that won't run.
Pretty much any scanner with a WIA or TWAIN driver on Windows, which covers most flatbed, sheet-fed, and all-in-one units. There's even a built-in bridge for old scanners that only ship a 32-bit driver.
No subscription, no cloud, no account. Just a PDF editor that does its job on your computer.
Get StealthPDF — $9.99