Show HN: Prompt Builder – A block-based editor for composing AI prompts

**Show HN: Prompt Builder – A block-based editor for composing AI prompts**

Hi HN,I built Prompt Builder (https://www.promptbuilder.space/) because I was frustrated managing complex AI prompts in plain text boxes.The core idea: instead of one giant textarea, you compose prompts from draggable, reorderable blocks. Each block can have its own XML/custom tags, visibility toggles (so you can A/B test sections), and duplicates.Key technical details: - Live compiled preview: the right pane shows the exact string being sent, updating as you drag/toggle blocks - Dynamic variables: define {{var_name}} once, use across blocks, change in one place - Multi-model execution: send the same compiled prompt to different model APIs and compare outputs - Voice transcription + optional translation (useful for non-English prompt authoring) - Editable response pane: modify the model's output in place - Folder organization, search, and password-protected shareable linksI'd love feedback on the UX and whether the block metaphor resonates with how you think about prompt structure. Comments URL: https://news.ycombinator.com/item?id=46984792 Points: 1 # Comments: 0

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