Free tool · runs in your browser
Prompt Doctor
Paste a prompt that gave you a bad result. Prompt Doctor shows what it is missing, then writes a fixed version that keeps your words. Works for writing, image, photo-edit and video prompts.
Paste your prompt
What a complete prompt needs
AI tools fill every gap in your prompt with a guess. A short request like "make a good YouTube video" leaves the topic, audience, length, tone and structure to chance, so the answer comes back generic. Each kind of prompt has its own gaps to close:
| Prompt type | What Prompt Doctor checks | Example of a fix |
|---|---|---|
| Writing | Role, topic and details, audience, length, tone, output format, rules | Audience: first-time founders, Length: under 200 words |
| Image | Subject details, style, lighting, composition, colours and mood, aspect ratio, exact text, what to avoid | Style: soft watercolour, Aspect ratio: 4:5 |
| Photo edit | What to change, keeping your face, lighting, framing, realism, what to avoid | Keep my face exactly the same |
| Video | Subject and action, camera move, shot type, lighting and mood, style, length and shape, sound | Camera: slow push-in, 8 seconds, 9:16 |
Want to learn the pattern yourself? Read how to write a good AI prompt, or start from one of the ready-made prompts.
More free prompt tools
Prompt Analyzer
Check a writing prompt against 7 quality signals, including vague filler words.
Open Analyzer →Pro Prompt Generator
Type a short idea and get a detailed prompt for images, video, photo edits or ChatGPT.
Open Generator →Prompt Converter
Move a prompt between ChatGPT style, Midjourney parameters and AI video shot lists.
Open Converter →Questions, answered
What does Prompt Doctor check?
It first works out what kind of prompt you wrote: writing, an image, a photo edit or a video. Then it checks the parts that kind needs. For writing that is the role, topic, audience, length, tone, format and rules. For images it is subject, style, lighting, composition, colours, aspect ratio and what to avoid. For video it adds camera move, shot type, length and sound.
How is the fixed prompt made?
Prompt Doctor keeps your own words and adds only the missing parts. Anything it cannot know, such as your topic or audience, is added as a [BLANK] with an example, so you can fill it in before sending.
Is my prompt sent anywhere?
No. Prompt Doctor is a set of rules that runs in your browser. It makes no network requests and does not save what you type.
How is this different from the Prompt Analyzer and Optimizer?
The Analyzer scores a writing prompt against general signals. The Optimizer rewrites a prompt into a fixed five-part template. Prompt Doctor also handles image, photo and video prompts, and it changes only what is missing, so your prompt still sounds like you.