Stop losing yourbest prompts.
PromptVault stores, improves, and intelligently reuses your AI prompts with free models built in (no API key needed). Guest · Free · Pro — start with zero commitment. Your data never leaves your device.
PromptVaultDebug and Fix Any Bug
You are an expert debugger. Analyze the following code and identify all bugs, explain why each is problematic, and provide a corrected version with comments…
Implement Auth (Production-Ready)
Create a complete, production-ready authentication system with JWT tokens, refresh token rotation, bcrypt password hashing, and rate limiting…
Build a React Component
You are a senior React engineer. Build a fully accessible, reusable component with TypeScript, proper prop types, memoization where needed…
Everything you need to write better prompts.
PromptVault combines a robust local-first storage engine with AI-powered features designed specifically for modern developer workflows.
Vibe Mode
Type a rough idea in plain English. PromptVault's AI transforms it into a structured, production-ready prompt calibrated to your developer type — whether you're a vibe coder building in Lovable or a backend engineer writing NestJS middleware. No prompt engineering knowledge required. Just describe what you're trying to build.
- Zero-shot prompt generation
- Persona-calibrated context
- Automatic formatting
AI Studio
Run prompts immediately inside PromptVault. No copying and pasting back and forth to ChatGPT. Every vault comes with 10 free top-tier models (like Llama 3 and Mixtral) built-in via OpenRouter—absolutely no API keys required to start.
- 10 free models included
- BYOK support
- Local Ollama support
Model Arena
Draft one prompt and run it against up to 3 different AI models simultaneously. Instantly compare how Claude 3.5 Sonnet, GPT-4o, and Llama 3 handle the exact same instructions.
- Compare up to 3 models
- Syncs with AI Studio
- Find the best model for the task
Prompt DNA
Every time you copy a prompt, PromptVault remembers. Thirty seconds later, it asks how it went. Over time, a quality score emerges from your real usage data — not guesswork. The prompts that consistently deliver float to the top. The ones that waste your time get flagged. You stop reusing prompts that don't work.
- Real-time usage tracking
- Empirical quality scores
- Automated feedback loops
Prompt Improver
Pick any saved prompt and choose a mode. Sharpen removes the ambiguity that causes AI tools to guess wrong. Expand adds the context and constraints that junior models need. Compress strips the filler that bloats your token count. Reformat restructures into ROLE → CONTEXT → GOAL — the format that consistently produces the best output across Claude, GPT, and Gemini.
- Sharpen & Expand modes
- Compress to save tokens
- Standardize prompt architecture
Five ways AI makes your prompts better.
Prompt Debugger
Instantly analyze your prompts against structural best practices. The debugger runs a static analysis to find missing context, vague instructions, and formatting errors, giving you an empirical score before you even run it.
- Static analysis for structure
- Empirical scoring system
- 1-click AI auto-fix
Prompt Variants
Never settle for the first draft. Generate multiple specialized variations of your prompt with one click to test different angles, tones, and structures.
- 1-click variation generation
- Test multiple approaches
- Quick save to vault
Generate Variations
Create 3 distinct versions of your prompt to test different angles, personas, and lengths.
Browser Extension
The moment you focus any text field in Claude.ai, ChatGPT, Cursor, Windsurf, v0, Linear, Notion, or any other tool — a button appears. Click it. Search your vault by keyword or tag. Click the prompt. It pastes. No switching windows. No losing your flow. Your entire prompt library available everywhere you type.
- Injects into any text field
- Offline capable
- Zero context switching
Project Context
Define your project once: Next.js 14, TypeScript, Prisma, Supabase. From that moment, every prompt you copy automatically appends your stack details below the prompt text. Your AI tool gets the context it needs to give relevant answers without you typing it every single time. Switch projects — the context switches with you.
- Automatic context appending
- Unlimited project profiles
- Maintain tech stack rules
Know when to use it. Know when not to.
Every prompt can carry usage notes — when it works best, what to watch out for, and when to reach for a different approach.
Debug and Fix Any Bug With Root Cause Analysis
BEST FOR
Complex bugs where the symptom is obvious but the root cause is unclear. Especially effective for race conditions, async state issues, and type-related errors in TypeScript codebases.
WATCH OUT
This prompt produces thorough output — expect 400-800 word responses. Not ideal for quick one-liner fixes or when you already know the root cause.
DON'T USE WHEN
The bug is in a UI styling issue (use the frontend-specific debug prompt instead) or when you need a quick hotfix for production and don't have time for full root cause analysis.
Add usage notes to any prompt — your future self will thank you.
Open vault to add annotations →Git Integration
Lock your prompts into version control. PromptVault's deepest pro feature lets you bi-directionally sync your prompt library with any GitHub repository. Treat your prompts exactly like your codebase.
- Bi-directional GitHub Sync
- Version control for prompts
- Team collaboration
Local First
There is no PromptVault server that knows your prompts. Your vault lives in your browser's IndexedDB — on your machine, under your control. Works on a plane. Works in a Faraday cage. Works when our servers are down (they might not even be running).
- IndexedDB local storage
- PWA installable app
- Works 100% offline
Import / Export
Your data is yours. Export your entire library as a single encrypted `.wvault` file to safely back it up or move instances. Want to share a specific folder of prompts with your team? Export just that folder as a `.wpack` file they can instantly import.
- Encrypted .wvault backups
- Shareable .wpack files
- Zero vendor lock-in
One vault. Every device.
Install PromptVault on your laptop, open it on your phone. Your prompts sync automatically when you're on Pro.
What the vault solves.
"I used to have a Notion doc with prompts but I'd forget to update it and it was always out of date. The browser extension means I actually use the vault — I don't have to switch tabs."
"I was rewriting my RAG system prompt every time I switched between Claude and GPT-4. Now I save one version per model and paste with one click. The Prompt DNA score tells me which model variant actually performs better."
"I ship alone. Every minute I waste reconstructing a prompt is a minute not spent building. PromptVault turned my scattered ChatGPT history into an organized library I can actually use."
Try it live. No account. No API key.
Type a prompt below and run it against any free AI model instantly. 3 tries remaining this session.
Response will appear here...
Privacy by Default.
Connect OpenAI, Anthropic, or any custom endpoint. Keys are stored locally.
Full JSON exports. You aren't locked into our ecosystem.
Simple Pricing.
- 10 Free AI Models Built-in
- 100 Saved Prompts
- Browser Extension Included
- Import / Export (.wvault)
- Multi-Device Cloud Sync
- Unlimited Prompts
- Bi-directional Git Sync
- Premium Model Access
- Unlimited Project Contexts
- Priority Support
Everything you'd want to know.
18 Included Expert Prompts
Zero setup required. Ready to use immediately.
Debug and Fix Any Bug With Root Cause Analysis
Implement Production-Ready Authentication
Senior Code Review: Find Issues and Refactor
Build a Production-Quality React Component
Integrate a Third-Party API With Error Handling
Design Database Schema and Write Optimized Queries
Write Comprehensive Tests for Existing Code
Full Performance Audit and Targeted Optimization
Implement Rate Limiting Middleware
Build a Real-Time WebSocket Feature
Optimize React Rendering Performance
Implement CI/CD Pipeline With GitHub Actions
Design a REST API From Scratch
Implement Caching Strategy
Containerize an Application with Docker
Write a Regex for Complex Data Extraction
Configure Webpack/Vite for Production