WEB APPLICATION
SagePDF
Professional PDF tools that run entirely in your browser—your files never leave your device, and we never see them.
- Client
- SagePDF
- Services
- Web Application Development, SaaS Development
- Technology
- Next.js, TypeScript, Browser APIs
The problem
Most online PDF tools require uploads and accounts, which creates friction and privacy risk for everyday document work.
What we built
A privacy-first suite of PDF tools that process files entirely in the browser — merge, split, convert, edit, and more — with no signups and no server-side file storage.
Technical architecture
Next.js client-side application with browser-local PDF processing so documents stay on the user’s device.
Result
A live public product at sagepdf.com offering free, client-side PDF tools built by Webstume.
Have a similar system?
Tell us what you're working with. We'll tell you honestly whether we can help.