Total PDF Control.
Zero Data Tracking.
PDFgo performs intensive PDF operations right in your browser memory. Documents never touch a cloud server. Fast, free, and absolutely private.
See what changed in a contract or policy - like track changes, fully private in your browser.
Open Compare100%
Local
∞Files
Unlimited
0ms
Upload Wait
100% Private
& Secure.
Turn on Airplane Mode and test it yourself - files never leave your device. Everything is processed locally, right here in your browser.
Equipped for every task
Manipulate, secure, and understand documents - all offline in your browser.
PDF Diff Checker
Compare two PDFs side-by-side to find text differences quickly.
Sign Document
Draw or upload a visible signature and place it on a PDF entirely offline.
Edit Metadata
View and modify hidden document properties like Author and Title.
PDF to Markdown
Convert PDF documents into structured, formatted Markdown automatically.
Privacy & how it works
Site-wide answers about privacy, offline use, and limits - not step-by-step tool guides.
Yes. Unlike traditional PDF tools that force you to upload sensitive documents to their servers, PDFgo processes files locally using browser-based document libraries. Merging, splitting, and extracting happen in your browser memory.
Absolutely. Once the application engines are cached, you can turn off your Wi-Fi or use Airplane Mode. Since PDFgo is a PWA (Progressive Web App), it runs entirely from your local browser storage, allowing you to use every tool seamlessly without an active internet connection.
To guarantee 100% privacy, PDFgo needs to download its specialized 'Workers' and OCR models (like Tesseract) directly into your browser's local cache. This one-time setup ensures that all processing happens on your CPU, so you never have to upload a single byte of your documents to a remote server.
Yes for several workflows - Document Compare, Word diff, PDF to Word, and Word to Markdown all run in the browser. Full pixel-perfect Office layout engines still need servers, so we stay honest about simplified conversion and text-first comparison where that applies.
There are absolutely no hardcoded limits on file size, page count, or usage frequency. The only actual limitation is the amount of RAM available on your local laptop or mobile device.
Stop uploading.
Start doing.
Merge, split, compress, and compare your PDFs completely privately in under a second. Try it now.