Hey HN! I'm Jaber, and I built Prompt Builder.
What it is:
A block-based editor for composing AI prompts. Think of it like Notion blocks, but purpose-built for prompt engineering—drag to reorder, toggle visibility, wrap in tags (XML/JSON/etc.), and see a live combined preview.
Why I built it:
After 6 months of juggling 100+ ChatGPT/Claude prompts across Notion, Slack DMs, Apple Notes, and random text files, I got tired of the chaos. Every developer and marketer I talked to had the same problem—no good place to save, organize, and reuse prompts. Most tools are either marketplaces (buy prompts) or plain text boxes. I wanted something that treats prompts like code: modular, version-controlled, and shareable.
What makes it different:
* Block-based composition: Each prompt is built from collapsible blocks (system message, instructions, examples, constraints). Reorder via drag-and-drop, toggle which blocks appear in the final output.
* Live preview with character count: See your combined prompt update in real-time as you edit.
* Voice-to-prompt: Click the mic icon on any block, speak, and it transcribes. Pro users can translate on the fly (50+ languages).
* Share without signup: Generate a shareable link (with optional password/expiration for Pro). No account needed to share or view.
* Tags & variables: Wrap content in custom tags (JSON schema, XML, whatever). Pro users get variables for parameterized prompts.
* Export/Import (Pro): Download as JSON, Markdown, or plain text. Import existing prompt libraries.
Try it (no signup required):
promptbuilder.space
What I'd love feedback on:
1. Does the block-based approach feel natural, or is it overengineered? I debated just doing folders + plain text, but blocks let you compose complex prompts systematically.
2. What features are missing? I built this for my own workflow, but I'm sure I'm blind to obvious gaps.
3. Pricing—does $5/month (50% launch discount) feel fair for Pro? Free plan gives you 3 prompts, 5 blocks each. Pro is unlimited + translation, variables, export, etc.
Built this mostly solo over the past month. Would genuinely love to hear what the HN community thinks—especially if you work with LLMs regularly.
Jaber_Said•4mo ago
* Block-based composition: Each prompt is built from collapsible blocks (system message, instructions, examples, constraints). Reorder via drag-and-drop, toggle which blocks appear in the final output. * Live preview with character count: See your combined prompt update in real-time as you edit. * Voice-to-prompt: Click the mic icon on any block, speak, and it transcribes. Pro users can translate on the fly (50+ languages). * Share without signup: Generate a shareable link (with optional password/expiration for Pro). No account needed to share or view. * Tags & variables: Wrap content in custom tags (JSON schema, XML, whatever). Pro users get variables for parameterized prompts. * Export/Import (Pro): Download as JSON, Markdown, or plain text. Import existing prompt libraries.
Try it (no signup required): promptbuilder.space What I'd love feedback on:
1. Does the block-based approach feel natural, or is it overengineered? I debated just doing folders + plain text, but blocks let you compose complex prompts systematically. 2. What features are missing? I built this for my own workflow, but I'm sure I'm blind to obvious gaps. 3. Pricing—does $5/month (50% launch discount) feel fair for Pro? Free plan gives you 3 prompts, 5 blocks each. Pro is unlimited + translation, variables, export, etc.
Built this mostly solo over the past month. Would genuinely love to hear what the HN community thinks—especially if you work with LLMs regularly.