PromptLab

Chrome extension for claude.ai

PromptLab

A lab notebook for your prompts — version history, result notes, and chains.

Add to Chrome

In review — coming soon to the Chrome Web Store.

Version history

Every edit is saved as v1, v2… — restore anytime.

Result notes

Log what worked (👍/🤔) per version.

Chains

Reusable multi-step prompt workflows.

No data leaves your device. Everything is stored locally.

Read the privacy policy →

Watch your prompts grow

Every save becomes a version — nothing is ever lost.

The History tab — rendered with the extension's actual UI styles.