What’s one small task you still leave the browser for?

I’ve been building toolardo.com around a simple idea: a surprising amount of everyday work can now happen directly in the browser.

It started with simple utilities, but has grown into tools for PDFs, developers, data, images, chemistry, statistics and more. Many of them process files locally without uploading them to a server.

I’m curious: what’s one small task you still open a desktop app, CLI tool, or separate service for that you wish could just run in the browser?

I’m looking for ideas that are genuinely useful, not just more converter