16x Prompt - AI Coding with Context Management for Developers

Workspaces for Multi-Repo Projects

Organize source code context using workspaces to manage multiple repositories and projects in one place. Switch between projects like a landing page, blog, or web app, and include multiple repositories in a single workspace for related work (e.g., frontend and backend).

Easily manage complex projects and switch contexts without losing track of files.

Automated Formatting & Token Tracking

The app automatically adds optimal formatting instructions to generate ready-to-use code, and optimizes the source code and prompt for best results. A built-in token limit counter keeps your prompt within the LLM's token limit.

Generate high-quality, ready-to-use code while avoiding token limit errors.

BYOK with Multi-Provider Support

Bring your own API key to send prompts directly via API. Supports OpenAI, Anthropic Claude, Google Gemini, DeepSeek, OpenRouter, Ollama, Azure OpenAI, and any provider offering OpenAI API compatibility (e.g., Fireworks, Hyperbolic, DeepInfra).

Use your preferred LLM provider without being locked into a single ecosystem.

Safe Code Changes with Visual Diffs

Automatically apply code changes with the new code edit feature, powered by latest AI models. View visual diffs of changes, and every change is automatically backed up and reversible, so you can roll back if needed.

Apply AI-generated code changes with confidence and full reversibility.

Reusable Task Instructions & Custom Instructions

Save commonly used prompts (refactoring, creating a new page, writing docs) as task instructions to reuse later. Craft and save custom instructions for different tech stacks like Next.js, Python, and SQL, and fine-tune with various optimization settings.

Streamline repetitive coding tasks and maintain consistent prompt quality across projects.

Local Data Privacy & Subscription Use

The app works locally without an Internet connection, allowing you to copy-paste final prompts into locally running LLMs for privacy. You can also use your existing ChatGPT Plus or Claude Pro subscription by copying the prompt into the UI, avoiding API costs.

Protect sensitive code and reduce costs by leveraging existing subscriptions or local models.

• Local-First Desktop App with Privacy16x Prompt is a desktop application that runs locally on your machine, not a cloud-based service. Prompt generation happens locally, and you can use it without an Internet connection, copy-pasting final prompts into locally running LLMs to protect your privacy.
• Broad API Integration and BYOKThe tool supports API integrations with OpenAI, Anthropic Claude, Google Gemini, DeepSeek, OpenRouter, Ollama, and Azure OpenAI, plus any provider offering OpenAI API compatibility (e.g., Fireworks, Hyperbolic, DeepInfra). You bring your own API key, and you can compare outputs from different models side-by-side.
• Structured Prompt Creation with Token Tracking16x Prompt helps you add source code files and instructions to generate an optimized prompt, automatically adding formatting instructions. It includes a built-in token limit counter to keep prompts within LLM limits, and you can copy the final prompt in one click or send it via API.
• Code Editing with Safety FeaturesThe new Code Edit feature automatically applies code changes using latest AI models, shows visual diffs, and every change is automatically backed up and reversible, allowing you to roll back with confidence.

• Free Version Limitations16x Prompt is free to download and use, but the free version only generates 10 prompts per day. A paid license removes this limitation. No refunds are offered, so testing the free version first is recommended.
• API Usage Requires Your Own Key and Cloud ConnectionWhile the app runs locally, API integration features require you to enter your own API key and connect to respective cloud services like OpenAI or Anthropic. This means API-based usage is not fully offline.
• Supported Languages and FrameworksThe tool supports all major programming languages (Python, JavaScript, TypeScript, Java, C++, SQL, etc.) and popular frameworks (React, Vue, Next.js, Flask, Django). However, the exact list is not exhaustive, and specific framework coverage may vary.
• Pricing and Refund Policy Check the official website. The site states no refunds are offered due to Stripe fees, and invoices are mentioned but not detailed. For full pricing, you would need to check the pricing page directly.

Refactoring Existing Code

Use 16x Prompt to refactor code in existing codebases. Select the relevant source code files, enter your refactoring instruction, and the app automatically optimizes the prompt with formatting instructions. Copy the final prompt and paste it into ChatGPT, Claude, or DeepSeek to get ready-to-use refactored code, or send it via API to compare outputs from models like GPT-4.1 and Gemini 2.5 Pro.

Creating New Pages or Features

Speed up building new pages or features by saving your commonly used prompts as task instructions. Add your instruction, select the relevant source code files from your workspace (which can include multiple repositories like a frontend and backend), and generate an optimized prompt. The built-in token limit tracker ensures your prompt fits within the LLM's context window.

Writing Documentation

Generate documentation for your codebase with ease. Save a 'write docs' prompt as a reusable task instruction, then select the source files you need. 16x Prompt automatically adds optimal formatting instructions to produce ready-to-use documentation. You can also create custom formatting instructions for different documentation styles.

Comparing AI Model Outputs

When using the API integration with your own API key, compare the code output of different LLM models side-by-side—for example, GPT-4.1 vs Gemini 2.5 Pro—to see which one gives the best results for your specific coding task. This is especially useful for complex tasks where model choice matters. You can also use the code edit feature to apply changes safely with visual diffs and rollback support.

Download the free desktop app for your operating system.

Enter your instruction and select the source code files to generate the final prompt.

Copy the generated prompt and paste it into ChatGPT or Claude.

Optionally connect your own API key to send requests via API.