Write Better AI Prompts, Faster

Hermes Markdown is a specialized markdown editor built for prompt engineering. It helps you craft, test, and refine AI prompts with real-time preview, built-in prompt templates, token estimation, and task structuring. Perfect for working with AI models, building system prompts, and developing few-shot examples.

No! Hermes Markdown requires no registration, no email, and no personal information. Simply open the website and start crafting prompts immediately. Your work is saved locally in your browser.

No installation required! Hermes Markdown runs entirely in your web browser. Simply visit the website and start writing. Your work is saved locally in your browser, so you can access it anytime without any setup.

Yes! Hermes Markdown is completely free to use. There are no hidden costs, premium features, or subscription fees - everything is available to all users.

Hermes Markdown includes 30+ specialized templates organized by use case: Prompt Foundation (/structure, /success, /constraints), Content Transformation (/summarize, /rewrite, /explain), Content Generation (/idea, /steps, /email), and Technical (/documentation, /refactor, /test). Type '/' in the editor to see all available templates with autocomplete.

Press '/' in the editor to open the command bar with autocomplete. Type to search templates (e.g., '/task' for task prompts, '/critique' for feedback), or browse by category. Select a template to insert it. Templates include placeholders like {task}, {audience}, {constraints} that you customize for your specific prompt.

The Task Prompt Generator is a comprehensive template for creating structured, research-backed prompts. It guides you through spec-first development with phases for understanding, planning, and verification. Perfect for complex tasks where clarity and detailed requirements matter. Includes frameworks like constraint prioritization (MUST/SHOULD/MUST NOT) and multi-perspective reflection.

Start with the /structure template to scaffold the basics: Role, Context, Task, Constraints, and Output format. Use /success to define what done means. Add /output for format requirements and /examples for few-shot learning. Use /constraints to clarify scope and assumptions. The templates guide you toward research-backed prompt patterns that work better with LLMs.

Yes! You can save any prompt as a markdown file and import it later. Templates support YAML frontmatter for metadata like title, description, and tags. Export your best prompts and share them with your team or use them across projects.

Hermes Markdown automatically estimates token count using the formula: word count × 1.35 (a safe approximation for LLM token count). See your token count in real-time as you write. This helps you stay within context windows and optimize prompt length for your LLM.

Hermes Markdown calculates a Flesch Reading Ease score to measure prompt clarity. Higher scores (60+) indicate clearer prompts that LLMs will better understand. Use this to refine wording and remove ambiguity—especially important for system prompts where clarity directly affects model behavior.

Use the /verify template to create a checklist of quality gates: Is it specific? Does it include examples? Are constraints clear? Then use /critique to highlight gaps and logic issues. Iterate with /iterate to refine based on feedback. The combination helps catch ambiguity before sending prompts to AI.

Few-shot prompting means providing 1-3 examples of inputs and expected outputs to guide the model. Use the /examples template to structure examples clearly. Include diverse cases to show the model the pattern. Few-shot prompting typically improves accuracy 10-30% depending on task complexity.

The table editor (Ctrl+Shift+T) makes markdown tables simple. Add rows and columns, edit cell content, and preview your table before inserting. Useful for comparison tables in prompts, structured data requirements, or output format specifications.

Yes! Zen mode hides all interface elements except the editor for distraction-free prompt crafting. Press Esc to toggle. Perfect for long prompt engineering sessions or when you need full focus.

The timer helps you track focused work sessions. Useful when brainstorming prompt variations, testing approaches, or during deep work. Set a duration and focus without distractions.

Yes! Choose from multiple monospace fonts, adjust font sizes for comfort, and toggle between light and dark themes. The editor adapts to your preferences for the best writing experience.

Yes! Export as clean markdown files (.md) to use with other tools, or as PDF for sharing with non-technical stakeholders. Your YAML frontmatter metadata (title, tags, description) travels with exported markdown files.

Yes! Import existing .md files from your device. Hermes Markdown preserves your formatting and YAML frontmatter. Great for migrating prompts from other editors or loading files you've previously exported.

Export your prompts as markdown files and share via email, Slack, or version control. Since everything is markdown with YAML metadata, prompts work on any platform. Teams can version control prompts in Git to track evolution and collaborate.

Your work is automatically saved as you type in your browser's local storage. You can also export documents as markdown or PDF to keep permanent copies on your device or share with others.

Absolutely! Hermes Markdown operates entirely offline, meaning your prompt content never leaves your device. All your files and data stay local and secure. This privacy-first approach ensures that your sensitive prompts, proprietary techniques, and confidential AI strategies remain completely under your control.

No, we don't collect any personal data, usage statistics, or prompt content from your documents. Everything stays on your device. We don't use analytics, tracking, or any data collection methods. Your prompts are yours alone.

Yes! Once you've loaded the website, Hermes Markdown works completely offline. You can write, edit, and export prompts without an internet connection. Your work is stored locally in your browser.

If you clear your browser's local storage, your saved prompts will be deleted. However, you can export your prompts as markdown before clearing data to keep permanent copies. We recommend regularly exporting important prompts.