PromptBridge Keyboard

PromptBridge Keyboard helps you write better messages using AI-ready prompts.

Instead of sending your text directly to an AI service, PromptBridge builds structured prompts that you can paste into your preferred AI app.

This gives you more control, more variations, and the freedom to adjust prompts exactly the way you want.

Unlike many AI keyboards that generate only a single response, PromptBridge lets your AI app generate multiple variations using its own tone and intelligence. You can easily tweak the prompt before sending it, giving you better results and more flexibility.

Everything is editable — PromptBridge simply makes the process faster and easier.

Features

• AI prompt builder for messages, emails, essays, and social posts
• Rewrite, Improve, Summarize, Fix Grammar, Expand text
• Tone control: Casual, Professional, Formal, Friendly, Persuasive
• Generate 1–4 prompt variations
• GK mode for general knowledge prompts
• Copy text from the typing field with long press on the AI button
• Launch AI apps like ChatGPT, Gemini, Grok, Claude, and Perplexity
• Works with your favorite AI apps — no lock-in
• No login required
• 100% free

Privacy first

PromptBridge does not collect or transmit any typing data.
All prompts are generated locally on your device.

Your text never leaves your device unless you choose to paste it into an AI service.

Open-source acknowledgement

PromptBridge Keyboard is built on the open-source HeliBoard keyboard.

We acknowledge and thank the original developer Helium314 and the HeliBoard project (GPL-3.0).