Modular Prompt Builder
Combine different versions of prompts like Lego bricks. Use header from Prompt A v1 and body from Prompt B v3—mix, match, and experiment away.
LLM Playground with Superpowers
Run your prompt across multiple LLMs in parallel, see output side by side, compare latencies, token usage, and total generation time.
Version Control for Prompts
Keep track of your edits with Git-style versioning. Every change is logged so you can roll back or compare versions anytime.
Side-by-Side Diff Viewer
Instantly see what changed between prompt versions—visually and structurally. No more guessing what went wrong.
Latency Tracking & Token Insights
Dive into performance metrics with detailed latency, token usage, and cost breakdown per provider and model.
Just Use It, No Strings Attached
PromptKenstein is free to use. No pricing tiers, no credit cards. Just sign in and start crafting smarter prompts.
How it works
Take a peek at how PromptKenstein helps you experiment better. From prompt building to version diffing, here’s what it looks like in action.