Generic answer? Nine times out of ten the problem is not the AI, it is the prompt. Most people type a wish, like “write me a blog post,” when the AI needs an instruction. This free checker scores your prompt and shows exactly which pieces are missing.
An AI assistant will happily answer a vague request. It just fills in every blank you left, which is why the result comes back bland, or slightly not what you meant. The fix is rarely a longer prompt. It is a clearer one: say what you want, who it is for, and what a good answer looks like.
Paste a prompt below and you will get a score out of 100, a breakdown of what is already working, and a stronger structure to copy. It reads only the text you paste, in your browser, and nothing is stored.
What separates a weak prompt from a strong one
Strong prompts tend to share the same handful of ingredients. You do not need all of them every time, but the more a task matters, the more of these earn their place:
- A clear action (summarize, rewrite, compare) instead of a vague wish.
- Enough context, or the actual material to work from.
- The format you want back: a list, a table, a word count.
- Who the answer is for.
- The tone.
- Limits: length, points to include, things to avoid.
- An example of what good looks like.
- A rule to stick to the facts and not invent anything.
How the score works
The checker looks for those eight ingredients and gives you the weighted share your prompt includes. It is deliberately simple and transparent, so you can see precisely why you scored what you did, and change one thing at a time to watch it climb.
One honest limit. This measures how well built your prompt is, not whether it asks for the right thing. A perfectly structured prompt can still request something you do not actually want, so read your own wording as critically as the score does.
Who this is for
- Anyone whose AI answers keep coming back generic or off-target.
- Writers and marketers who prompt every day and want a quick gut check.
- Beginners who are not sure what a good prompt should contain.
- Anyone teaching a colleague or student to prompt better.
Getting your score up
- Add the missing ingredient with the biggest weight first, usually a clear objective, real context, or an accuracy rule.
- Say the format out loud in the prompt. “As a five-point list” changes the whole answer.
- Edit, then re-check. Watching the number move teaches you faster than any rule.
- Keep a note of the prompts that score well. You will reuse them.
Frequently asked questions
Does a higher score mean a better answer?
Usually, but not always. A clear prompt makes a good answer far more likely. It cannot guarantee the AI gets its facts right, which is a separate step.
Is the prompt checker free and private?
Yes. It is free, needs no sign-up, and runs entirely in your browser, so the prompt you paste is never uploaded, stored, or logged.
Does it rewrite my prompt with AI?
No. It shows what is missing and gives you a stronger structure to copy. Keeping it AI-free is what makes it fast, private, and predictable.
What score should I aim for?
Anything above roughly 75 is strong for everyday use. For high-stakes tasks, add the accuracy and constraints pieces even if your score is already good.
Why did my long prompt score low?
Length is not structure. A long, rambling prompt can still miss the format, audience, or accuracy rules the checker looks for. Clear beats long.
Related guides
- How to Learn Prompting for Free for the ideas behind every element the checker looks for.
- Best Free AI Writing Tools in 2026 to choose where you will send your improved prompts.
- AI Job-Search Prompt Builder if the prompt you are polishing is for a resume or application.
Reviewed by the TwistyApps team. Last reviewed 16 July 2026.
