Gemini Coding

Best Gemini AI Prompts for Coding (2026)

Gemini 2.5 Flash and Gemini 3.5 Flash are strong mid-tier coding models with excellent multimodal capabilities — you can paste screenshots of errors, UI mockups, or architecture diagrams and get code in return. These prompts are optimised for Google AI Studio, the Gemini API, and Gemini in Google Workspace for coding, debugging, and code review tasks. Note: Gemini 3.5 Pro has been delayed three times as of July 2026 — these prompts are tested on the currently available Gemini Flash tier.

⌨️ 6 prompts 🕐 Updated Jul 21, 2026

💡 How to use these prompts: Replace everything in [BRACKETS] with your specific details before sending. Click Copy to copy any prompt to your clipboard instantly.

Debug From a Screenshot

Debug errors by pasting a screenshot — no code required

[ATTACH SCREENSHOT OF ERROR OR UI] I have the error or issue shown in this screenshot. Please: 1. Identify what is causing the problem 2. Show me the corrected code or configuration 3. Explain why this error occurs 4. Suggest how to prevent it Stack: [YOUR TECH STACK] Context: [ANY ADDITIONAL CONTEXT]

Build UI From a Mockup

Turn a design mockup into working code with one prompt

[ATTACH MOCKUP IMAGE OR SCREENSHOT] Build the HTML/CSS/[FRAMEWORK] code to recreate the UI shown in this image. Requirements: - Match the layout and visual hierarchy as closely as possible - Use [Tailwind / plain CSS / Bootstrap — specify] - Make it responsive - Add placeholder text and images where shown Output clean, commented code I can paste directly.

Code Review

Get a thorough code review from a senior engineer perspective

Review the following code as a senior engineer. Focus on: - Correctness and potential bugs - Performance issues - Security vulnerabilities - Code readability - Better patterns or approaches Code: [PASTE CODE HERE] Be specific. Point to line numbers where relevant.

Explain an Architecture Diagram

Understand and critique any system architecture diagram

[ATTACH ARCHITECTURE DIAGRAM IMAGE] Please: 1. Describe what this architecture represents 2. Explain how data flows through the system 3. Identify potential bottlenecks or single points of failure 4. Suggest improvements 5. Estimate the complexity of building this system

Generate a SQL Query

Generate production-ready SQL from plain English

Write a SQL query for the following requirement. Use [PostgreSQL / MySQL / SQL Server — specify]. Return the query with inline comments explaining each clause. Requirement: [DESCRIBE WHAT YOU NEED] Tables available: [PASTE SCHEMA OR DESCRIBE TABLES]

Refactor for Readability

Clean up messy code while preserving behavior

Refactor the following code to make it cleaner and more readable, without changing functionality. Apply best practices for [LANGUAGE]. Add comments where logic is non-obvious. [PASTE CODE HERE] Show the refactored version and explain each major change.