AI PROMPT ENGINEERING WORKSPACE

Engineer
Better Prompts.

Auto-engineer, test, compare and save AI prompts powered by Qwen AI. Bring your own Qwen Cloud key — we store nothing, send nothing, charge nothing.

⚡ TRY THE AGENT SEE FEATURES
// WHAT YOU GET
⚡
PROMPT AGENT
Describe your goal — the agent generates 3 variations, tests them all against Qwen, judges the winner and refines it automatically. Zero manual iteration.
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STYLE EXTRACTOR
Paste any novel, story or article. The agent extracts the writing style, tone and patterns and turns them into reusable prompt templates.
Write system + user prompts, pick your model, tune max tokens. Run against real Qwen models and see output instantly.
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COMPARE MODE
Run two prompt variations simultaneously. Qwen AI judges which output is better — real AI scoring, not random numbers.
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PROMPT LIBRARY
12 battle-tested templates across writing, code, marketing, security and analysis. One click to load and customize.
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SAVE & RESTORE
Save your best prompts locally. Load them back anytime. Export to JSON. Your prompts stay yours — no account needed.
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PROMPT ANALYZER
Instant feedback on clarity score, token count and word count. Know if your prompt is structured for success before you run it.
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BYOK — YOUR KEY
Paste your Qwen Cloud key once. It stays in your browser. We never see it, never store it, never touch your usage.
Bring Your Own Key

PromptLab calls Qwen Cloud directly from your browser using your API key. Zero middlemen. Zero markup. You pay Qwen Cloud's standard rates — nothing extra.

Your API Key
→
Your Browser
→
Qwen Cloud API
→
Real Output
GET STARTED FREE
12 PROMPT TEMPLATES
2 CLAUDE MODELS
0 SERVERS / ACCOUNTS
∞ SAVED PROMPTS