AI sidebar and browser agent for reading, writing and research
AI sidebar and browser agent for reading, writing and research
Block Enter records 0 monthly visits with — month-over-month growth and Free pricing. PromptBox records 18,543 monthly visits with +30.2% growth and Free Trial, Paid pricing.

Stop accidental sends in ChatGPT, Gemini, Claude and Perplexity
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | chromewebstore.google.com | promptbox.ai |
| Pricing Model | Free | Free Trial, Paid |
| Monthly Visits | 0 (0) | 18.54K (18,543) |
| MoM Traffic Delta | 0 (—) | +4.3K (+30.2%) |
| Primary Market & Share | 🌐 Global (—) | 🇺🇸 United States (58.6%) |
| Direct Visits / mo | 0 | 11.43K |
| User Rating | 4.2 | 4.2 |
| Supported Platforms | Browser Extension | Website |

Stop accidental sends in ChatGPT, Gemini, Claude and Perplexity
Pressing Enter inside a supported AI chat box inserts a line break instead of firing the message off to the model.
Deliberate submission stays available through the modifier-key shortcut, so nothing about your normal workflow is lost.
Works on ChatGPT, Google Gemini, Claude and Perplexity AI, with the supported-service list refreshed as new chat UIs launch.
Configure once and the behaviour follows you between tabs and signed-in Chrome profiles.

Organize, store and paste your prompts anywhere with a shortcut
Store prompts, replies, code snippets and templates in folders so your best content is always one search away instead of buried in notes.
Add variables to any prompt and fill them in through a small field when you use it, so one template adapts to many situations.
Type a trigger and PromptBox expands it into full text directly inside Gmail, ChatGPT, docs, editors or any site with a text field.
Keep one library that works across your AI tools and everyday apps, ending duplicate copying and pasting between them.
AI sidebar and browser agent for reading, writing and research
AI sidebar and browser agent for reading, writing and research

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An extendable launcher that puts your tools, AI, and automations one keystroke away

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