A precision console for composing LLM prompts. Pick from 149 roles, tune 6 sliders, get 3 outputs: natural-language prompt, universal XML pivot (AI Esperanto), and native transposition for your target model. Built for people who write serious prompts daily and are tired of re-explaining context to every new model. Single-file, offline-first PWA. No account, no tracking, no subscription. $21 once, yours forever. Built solo, in the open.

Hi Product Hunt 👋 I'm Eric, solo founder of NewTone Labs. My background isn't software — it's early childhood education. I built PromptMachine on an Android phone, orchestrating AI collaborators, because I believe 2026 is the year an independent creator can ship a serious tool with almost no resources. PromptMachine is not a chatbot wrapper. It's an instrument: you compose a prompt like you'd play a console — role, action, six sliders, filters — and it outputs three things: a natural-language prompt, a structured XML pivot I call AI Esperanto, and a native transposition optimized for your target model. The same composition travels across ChatGPT, Claude, Gemini, or a local model. Three commitments: no subscription, no account, no tracking. It's a single inspectable HTML file that works offline. $21, one time, yours forever. I'll be here all day — ask me anything, especially the hard questions. Honest feedback beats upvotes.

I'm Eric.

My background is early childhood education, not software. For the past months I've been orchestrating AI collaborators (Claude, Gemini, others) to build PromptMachine a single-file, offline-first console for composing LLM prompts, launching here August 4.

No funding, no team, no shortcuts on quality just a lot of grep-before-code discipline and cross-checking every output across models to avoid AI sycophancy.

I'm Eric.

No funding, no team, no shortcuts on quality just a lot of grep-before-code discipline and cross-checking every output across models to avoid AI sycophancy.

PromptMachine

Not an assistant. An instrument.

Not an assistant. An instrument.

Forum Threads

"I built a serious prompt engineering tool with zero coding background — AMA"

Forum Threads

"I built a serious prompt engineering tool with zero coding background — AMA"