Brevio is a collection of 186 free tools for PDF, images, text, dev, and AI tasks — all running entirely in your browser. No uploads. No accounts. No rate limits. Processing happens on your device using WebAssembly and native browser APIs. Files are never sent to a server because there is no server involved. Categories: PDF merge/split/compress/sign, image editing and conversion, JSON/JWT/regex/hash dev utilities, token counter, LLM cost calculator, invoice generator, and more.