I built 128 free browser tools because every "free" tool I used was secretly uploading my files

A few months back I needed to compress a PDF, remove a background from a product photo, and convert a video clip — three different tasks, three different "free" websites. Every single one uploaded my file to their server first. One had a daily limit. One slapped a watermark on the output unless I paid.

That's what got me building KuberAgent. It's 128+ tools — PDF editing, image processing, video/audio tools, GST and tax calculators, dev utilities like a JWT decoder and regex builder — but the core idea is that everything runs inside the browser using WebAssembly. Nothing ever gets uploaded anywhere.

A few things I learned building this:

The privacy angle resonates more than I expected. I assumed people would care about speed or the free pricing, but the "your files never leave your device" line is what actually gets people to try it and come back.

Bundling 128 tools instead of launching single-purpose tools was a bet. Most successful tool sites I see (iLovePDF, Remove.bg) do one thing well. I went the opposite direction — one place for everything — partly because I kept needing different tools myself and got tired of bookmarking ten different sites.

Monetization is the hard part right now. No uploads means no server costs, which is great, but it also means I can't really gate features behind a paywall the way SaaS tools do. Right now I'm leaning toward ad-supported, which comes with its own headaches (got my first AdSense account banned over an "invalid traffic" flag I'm still not sure I understand).

Curious if anyone here has gone the "bundle of free tools" route versus single-purpose — and how you ended up monetizing something where the whole pitch is "no account, no server, no upload."

kuberagent.com if anyone wants to poke at it.