LLM-Tuner

Try it Free

LLM-Tuner

Your zero-bullshit prompt testing playground.

Try it Free

Test & Compare Prompts Faster

🔁 Prompt Versioning

Keep track of every iteration. Never lose a winning prompt again.

⚔️ Live Comparison Mode

Run prompts side-by-side against multiple models or versions instantly.

📊 Output Scoring + Profiles

Define scoring criteria and save model profiles for consistent testing.

See LLM-Tuner in Action

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Intuitive Prompt Editor

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Side-by-Side Comparison

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Clear Version History

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Custom Scoring Setup

Improve Your Prompts in 3 Steps

1. Write

Craft your prompt variations in our clean editor.

2. Run

Execute prompts against selected LLMs instantly.

3. Compare & Improve

Analyze results side-by-side, score outputs, and iterate.

Loved by Builders

"LLM-Tuner cut our prompt iteration time in half. The comparison view is a game-changer."

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Alex Chen

Lead AI Engineer, StartupX

"Finally, a no-nonsense tool for prompt testing. Simple, fast, and effective. Exactly what we needed."

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Samantha Lee

Product Manager, TechCorp