Product8 Apr 2026
zeroutil - 200+ free browser-side tools
- Astro 6
- Preact
- Tailwind 4
- Hono
- BullMQ
- ffmpeg
- Docker
- Playwright
zeroutil.com is a free tools site: 264 tool pages in English and a German edition, across 16 categories from PDF and image tools to developer utilities, calculators and QR codes. Almost every tool processes the file in the browser, so nothing is uploaded; the few heavy media tools go to a separate Hono API that queues ffmpeg jobs through BullMQ and Redis in Docker and deletes the file afterwards. The site is Astro 6 with Preact islands and Tailwind 4, using pdf-lib and pdf.js for the PDF tools, with Vitest and Playwright coverage. Built, deployed and operated by me.