Privacy-first PDF, image & AI toolkit that runs directly in your browser. No uploads. No storage. No data leaks. Process PDFs, images & QR files, use AI PDF summariser, and import from Google Drive — all in one clean workspace without jumping between tools. Built using Web Workers & WASM so ~99% processing happens on your device. 18 tools live, 100+ planned. Would love feedback from the community 🚀

Wispr Flow: Dictation That Works Everywhere — Stop typing. Start speaking. 4x faster.

Stop typing. Start speaking. 4x faster.

Hey everyone 👋 Maker of Drop here. This started as a fun side project because I wanted to learn backend engineering by building a large file-processing system (queues, workers, concurrency, etc.). Initially I built everything the traditional way: upload file → server processes → download result. But before launching publicly, I realised two things: Server-heavy file processing gets expensive fast Most people (including me) don’t like uploading sensitive files to random tools While exploring alternatives, I discovered that modern browsers + Web Workers + WASM can handle most file processing locally. So I rebuilt everything with a browser-first, privacy-first approach. Now ~99% of processing happens directly on your device: PDF tools Image tools QR tools AI PDF summariser Google Drive import All in one workspace (no jumping between sites) Biggest challenges: Handling large files without crashing tabs Memory optimisation for low-end devices WASM debugging 😅 Keeping UI smooth during heavy processing This is still early (18 tools live, aiming 100+), so I’d genuinely love feedback from the PH community: • What tools should I add next? • Any UX improvements? • Performance issues on your device? • Would you use browser-first tools like this? Thanks for checking it out and supporting an indie maker 🚀

Hi folks, I have added couple of more tools in drop.calcont.in that are

Add watermark on pdf with customisations
Add password to pdf and encrypt pdf tool

Do check it out !!

Wispr Flow: Dictation That Works Everywhere — Stop typing. Start speaking. 4x faster.

Stop typing. Start speaking. 4x faster.

Hi folks, I have added couple of more tools in drop.calcont.in that are

Add watermark on pdf with customisations
Add password to pdf and encrypt pdf tool

Do check it out !!

Drop by CalConT

Browser-powered file & AI tools built for privacy

Browser-powered file & AI tools built for privacy