Developer builds free browser-only AI toolkit with no servers, ads, or data uploads

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A developer frustrated with slow, ad-heavy online tools has built RunAIToolkit, a collection of AI utility tools that run entirely within the browser using client-side JavaScript and Web Workers. The toolkit includes an API cost estimator for major LLMs like GPT-4o and Claude 3.5, a prompt and Markdown cleaner, and a Midjourney image grid splitter that uses HTML5 Canvas locally. Because all processing happens on the user's device, no prompts, text, or images are ever transmitted to an external server, making it suitable for sensitive or NDA-protected work. The project is built with Next.js and deployed as static files on Cloudflare's CDN, achieving a time-to-first-byte under 50ms globally at zero ongoing server cost. The developer released it as a side project to address common pain points faced by those who work frequently with AI-generated content and language model APIs.

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