WalkCast — Screen-Free Audio Digest for Outdoor Walks

A developer built WalkCast, a fully offline browser-based web app that converts long-form articles and newsletters into conversational audio podcast scripts using a local Llama 3.2 3B model served through Ollama. The tool generates the script via a local API call and plays it back with the browser's native SpeechSynthesis API at 0.95x speed, letting users listen during walks instead of reading on a screen while keeping all content on their own machine.

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 1: Touch Grass https://dev.to/challenges/hacktoberfest-week1-2026-10-05 WalkCast is a 100% offline, screen-minimizing audio web app that ingests long-form articles, tech news, and newsletters, converting them into a warm, conversational podcast script. Instead of staring at a smartphone screen while walking outside, WalkCast turns reading lists into an audio digest. Users can hit generate, put their phone in their pocket, keep their eyes on the road, and catch up on content during a 20-minute daily walk. Because WalkCast is designed as a privacy-first, offline tool powered by local Llama 3.2 inference, it runs locally on the user's browser without a hosted backend. php html < -- Simply open walkcast.html in any browser with local Ollama running -- Code // Fetch conversational podcast script from local Llama 3.2 instance const response = await fetch 'http://localhost:11434/api/generate', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify { model: 'llama3.2', prompt: Convert this article into a warm, conversational 1-minute podcast summary for a walk: ${articleText} , stream: false, options: { num predict: 150 } } } ; // Play back using native browser SpeechSynthesis at walking speed 0.95x const utterance = new SpeechSynthesisUtterance scriptText ; utterance.rate = 0.95; window.speechSynthesis.speak utterance ; How I Built It Local Inference: Meta's Llama 3.2 3B model running locally via Ollama. Audio Synthesis: Browser-native SpeechSynthesis API tuned to 0.95x pacing to match a relaxing walking cadence. Neighborhood UI: Designed with a cozy, storybook street aesthetic matching the theme of stepping outside and touching grass. Why Does Open Innovation Matter? Screen Minimization & Health: Shifts content consumption from visual screens to audio, reducing eye strain and increasing pedestrian awareness while walking outdoors. Complete Privacy: Personal reading lists and newsletters never leave your machine or get sent to third-party ad networks. Zero Cost & Offline: Works without cloud API subscriptions or cellular data reliance while out on trails or neighborhood routes.