I Built an All-in-One Browser Toolkit — File Viewer, Converter & P2P Share in 3 Files, No Backend

Description and use

A lightweight client‑side web app that lets users view, convert, and share files via WebRTC without any server or account.

Problem

Users need a single, zero‑install, server‑less tool to view, convert, and share files directly in the browser.

Outcome

A minimal, framework‑free web app that lets users view, convert, and share files directly between devices without any server or account, all hosted for free on GitHub Pages.

Workflow

• Open WebTools Utility in a browser
• Select a file to view or convert
• Use the viewer to preview images, PDFs, JSON, text, ZIPs
• Choose a conversion target format and convert locally
• For sharing, generate a 6‑character code or QR code
• Enter the code on the recipient device to establish a WebRTC connection
• Transfer files directly, with optional multi‑file support
• Extract ZIP contents within the app if needed

Evidence

WebTools Utility is a free, open‑source browser app I built and host on GitHub Pages. No backend. No accounts. No installs. Three files that do a lot.

Source

Powered by WebRTC — files go device‑to‑device, never through a server.

Source