The developer-first prompt engineering toolkit. Version, inject variables, live-test, and export to any LLM API — all in one terminal-native workspace.
// features
Built by devs who were tired of copy-pasting prompts into ChatGPT and calling it a workflow.
Track every iteration of your prompts with full diff history. Roll back to any version in one command. Git-style, but for prompts.
git-style diffsDefine {{variables}} in your prompts and inject dynamic values at runtime. Build reusable prompt templates that scale.
See rendered output in real-time as you type. Run A/B tests across prompt variants and compare responses side-by-side.
real-time evalOne-click export to OpenAI, Anthropic, Mistral, Cohere, and more. Auto-generates SDK-ready code snippets in Python, JS, or cURL.
10+ integrations// how_it_works
From blank canvas to production-ready prompt in under 60 seconds.
Open the editor and write your prompt using our template syntax. Add variables, conditionals, and context blocks with full autocomplete.
Inject test values and fire live requests against your chosen model. Compare outputs, measure token cost, and iterate in real-time.
Export your finalized prompt as a versioned API endpoint or copy SDK-ready code. Ship to production with confidence.
// community
PromptMolder replaced my entire prompt-testing workflow. The variable injection alone saves me 2 hours a week. It's what Postman is to APIs, but for prompts.
The versioning system is a game-changer for our team. We can finally track why a prompt change broke production and roll back instantly. Absolute must-have.
I've tried 6 prompt tools. PromptMolder is the only one that feels like it was built by an engineer, not a PM. The CLI alone is worth it.
Free forever for solo devs. No credit card. No BS. Just better prompts.
or: npm install -g promptmolder · MIT Licensed