✨first 10 runs free

writepromptsthatactuallywork.

paste any prompt and see what's weak, why, and how to fix it.

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your AI results are only as good as your prompts

72%professionals use AI daily at workbut most get inconsistent results

76%fewer AI errors with structured promptsmost people are nowhere near this

55%of users manually guess what to fixwith no framework to guide them

sources: intapp 2025, AI research 2024

paste it in. see what's broken. fix it.

paste any prompt

Claude, ChatGPT, Gemini, any model. no login required.

see what’s wrong

pebble checks against 5 framework elements and catches vague instructions, contradictions, and missing context. each issue explained in plain language.

apply the fix

every issue comes with a ready-to-use suggestion. one click. your prompt is done.

built for anyone who uses AI

students and researchers

—writing better prompts means better answers

—stop getting generic AI responses

—get more out of your LLM

AI consultants and freelancers

—your output quality depends on your prompts

—catch issues before you send work to a client

—get better at prompting over time

teams and support ops

—configuring AI chatbots for your product

—standardize prompt quality across your team

—no engineering support needed

see the difference

paste a weak prompt, get a stronger one back

before

You are a helpful AI. Answer user questions and be nice. Don't say wrong things.

vague instructionmissing outputmissing role

→

after

You are a customer support agent for a SaaS platform. Answer user questions clearly and concisely in 2-3 sentences. If you don't know the answer, say so and suggest contacting the support team. Never discuss pricing or make promises.

ready to use ✓

stop guessing. start writing prompts that work.

free. no signup. open for testing now.

test your prompt →