Naresh is a CS student and he kept running into the same annoying problem: every time he needed to merge my assignments, compress a heavy textbook, or sign a document, the only free tools available online required him to upload my files to their remote servers.

Aside from the privacy concerns of uploading tax forms or personal documents, they usually hit you with a "File too large" error or a paywall after two uses.

So, he built LocalPDF to solve this.

It’s a suite of 15+ PDF tools, and everything runs locally inside your browser using WebAssembly and Web Workers. Your files never leave your device.

He just pushed the v3.0 update, which includes:

Textbook Splitter: Automatically slices wide, landscape scanned textbooks into single A4 pages.

Deskew Studio: Manually straighten crooked document scans with micro-degree precision.

Compress & Merge: Shrink files or combine them instantly using your device's own RAM.

Sign & Redact: Black out sensitive text and drop signatures locally.

It's completely free, there are no file-size limits (since it relies on your own hardware), and there are no creepy tracking scripts uploading your data.

Try it out: https://local-pdf-five.vercel.app/