This task can be performed using Langfa.st
Test, refine, and share AI prompts instantly β no signup required
Best product for this task
Langfa.st is a lightweight and flexible prompt testing platform built to accelerate AI feature development. Created by a team with experience scaling AI-powered SaaS products to over 15M users, it eliminates friction in prompt engineering by offering instant access, dynamic Jinja2-based templating, and raw LLM output without API abstractions.
What to expect from an ideal product
- Open your browser and go to Langfa.st - no email, password, or account creation needed to start testing prompts right away
- Type or paste your AI prompt directly into the interface and hit test to get immediate results from multiple language models
- Use the built-in templating system to create dynamic prompts with variables you can quickly swap out for different test scenarios
- Get raw, unfiltered responses from the AI models so you can see exactly what the system outputs without any extra processing
- Share your tested prompts with team members or clients using a simple link - they can view and run tests without signing up either
