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Gemini: Multimodal Code Review from Screenshots

Use Gemini's multimodal capabilities to review code from screenshots, whiteboard photos, or handwritten notes and convert to clean code.

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Your Prompt
prompt.txt

                                

What this prompt does

This prompt uses Gemini's multimodal vision to turn [image_count] screenshot(s) of [content_type] into clean, reviewed code. It asks the model to accurately transcribe all visible code, identify the language and framework, review for bugs, security issues, performance problems, and style violations, rewrite to [coding_standard] standards, add error handling and type annotations, suggest [improvement_count] improvements with explanations, generate unit tests, and return the final code in a copyable block. Anything unclear in the image gets flagged with a best-interpretation note.

The structure works because it treats the screenshot as a draft, not a source of truth. Transcription, review, and cleanup happen in one pass so you stop retyping code by hand from chat screenshots or whiteboard photos, but the explicit "flag what's unclear" step keeps the model honest about low-confidence regions. The [improvement_count] cap and the standards in [coding_standard] keep the output focused rather than an open-ended rewrite.

When to use it

  • Someone sent you code as a screenshot and you'd rather not retype it.
  • You photographed a whiteboard or notebook from a planning session and want runnable code.
  • You're reviewing a snippet from a slide deck or video frame and want it cleaned up.
  • You want a quick bug/security/style pass on code you can't easily copy as text.
  • You need unit tests generated for transcribed code as a starting point.
  • You want the model to tell you which parts of a blurry image it couldn't read confidently.

Example output

Expect a transcription of the visible code, a stated language/framework identification, a review grouped by bugs, security, performance, and style, a rewritten version following [coding_standard], [improvement_count] suggestions with rationale, generated unit tests, and a final copyable code block. Where the image was unclear, the model flags the region and offers its best interpretation rather than silently guessing.

Pro tips

  • Use the highest-resolution image you can; transcription accuracy drops fast on blurry or low-contrast [content_type] captures.
  • Always re-verify the security and type fixes before committing — transcription is a draft, and a confidently wrong fix is worse than an obvious typo.
  • Set [coding_standard] to your real conventions so the rewrite matches your codebase instead of a generic style.
  • Keep [improvement_count] modest so the suggestions stay high-value rather than padding the response with trivia.
  • For multi-image inputs, set [image_count] accurately and order the screenshots logically so the model reconstructs the code in sequence.
  • Treat generated tests as a scaffold; confirm they actually exercise the logic rather than asserting the obvious.

Frequently Asked Questions

How accurate is the code transcription from screenshots?
It's good but not infallible, especially on blurry or low-contrast images. The prompt asks Gemini to flag any unclear regions and give its best interpretation, so you know where to double-check rather than trusting every line silently.
Does it just transcribe, or also review the code?
Both. After transcribing, it reviews for bugs, security issues, performance problems, and style violations, then rewrites to your `[coding_standard]`. The review and rewrite are the main value beyond simply saving you from retyping.
Can it handle multiple screenshots at once?
Yes. Set `[image_count]` to the number of images and order them logically. The model reconstructs code spanning several screenshots, though accuracy still depends on each image's clarity, so keep the captures sharp.
Should I trust the security fixes it suggests?
Treat them as a draft and verify before committing. Vision transcription plus an automated fix can be confidently wrong, and a plausible-looking but incorrect security change is more dangerous than an obvious bug you'd catch immediately.
Engr Mejba Ahmed

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Engr Mejba Ahmed

AI Developer · Software Engineer

I'm Mejba — I design and ship production AI systems, automations, and full-stack apps. If you want this turned into a working solution for your team, let's talk.

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