A prompt-engineering
workbench in your sidebar.

Write, enhance, score, compare, and organize AI prompts without leaving the page you're on. Privacy-first — your API key never leaves the browser.

Install free ↗ Open web app

Proof

Install with the operating context visible

Bring your own keyModel credentials stay in the browser. System by Dave does not proxy your prompts.

Free browser pathUse the extension or launch the web app from the same product surface.

Public policyReview privacy before installing or using the web app.

Source trailOpen the registry to inspect project activity and related builds.

Bring your own key

Every prompt gets a real-time score with specific, actionable suggestions to improve it.

Run the same input across variants and compare outputs side by side to find what works.

Save prompts with full version history, template variables, and shareable links.

Assemble complex prompts from reusable blocks and structured sections.

Parameterize prompts with typed variables and fill them in at run time.

Bring your own API key. Nothing is proxied — keys and data never leave your browser.

7 enhancement modes

Clarify Expand Compress Strict Engineer High-detail Ultra

Free to install. Works in any Chromium browser. Your data stays on your machine.