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You write the same opener every day. Cold emails. Code reviews. Blog post outlines. Customer-service replies. Each one is the same skeleton with two or three variables changed. AI Toolbox (formerly ChatGPT Toolbox) lets you save any prompt as a reusable template with {{variable}} placeholders, then trigger it instantly with the // shortcut inside any ChatGPT conversation.
Free plan saves 5 of your own prompts | Premium $9.99/mo unlocks unlimited | Lifetime $99
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Add to Edge// in ChatGPT to open your prompt picker. The preview shows the prompt content with {{variables}} still in place. You fill them in before sending.Most heavy ChatGPT users build a personal collection of go-to prompts. The pattern is universal: the same opener, the same instruction style, the same constraint phrasing, with two or three things changed each time. Most people store those prompts somewhere: a Notion page, a Google Doc, a Notes app on their phone, sometimes just a comment block in a code file.
Every time you reach for that prompt, the friction is the same. Tab switch. Find the file. Copy. Switch back to ChatGPT. Paste. Edit the variables. Send. It takes 30 seconds. You do it 20 times a day. That is 10 minutes a day, 50 minutes a week, more than 40 hours a year, spent moving text from one window to another.
A built-in prompt library closes that gap. Prompts live inside ChatGPT. // brings them up where your cursor already is. {{variables}} mark the parts that change so you do not have to remember which words to replace.
The Prompt Library modal has two sources: your personal saved prompts (private, local) and a curated public library organized by category. Marketing, Engineering, Support, Content, Productivity, Research: each category has dozens of well-written templates you can browse, search, and save into your personal library with one click. Premium adds favoriting, sorting by newest or most used, and full-text search across both libraries.
//.Inside a saved prompt, anywhere you write {{name}} becomes a placeholder. When you trigger the prompt with //, the placeholders stay highlighted in the input so you can fill them in for this specific use case. One prompt, infinite specific outputs.
A typical “Cold email opener” template might look like:
Write a 3-line cold email to {{recipient_name}} at {{company}} about {{value_prop}}.
Tone: friendly, direct, no fluff.
Open with a specific observation about {{company}}'s recent work.
End with a clear ask for a 20-minute call next week.One template, one // trigger, dozens of contextual emails. Same skeleton, different recipient/company/value-prop each time.
{{variable}} placeholders, save. From then on, // brings it up.Type // at the start of any ChatGPT message input. A popup opens with your saved prompts plus relevant public ones. Continue typing to filter the list (e.g. //cold narrows to prompts whose name or tags match “cold”). Arrow keys to navigate. Enter or click to insert. The prompt fills the input with all {{variables}} still highlighted; replace them and send.
{{variable}} placeholders. Name the prompt something searchable; pick a category.//. In any future conversation, type //, pick your prompt, fill the variables, send. The full prompt is in the input in under two seconds.{{recipient_name}} + {{company}} + {{value_prop}}.{{language}} code for correctness, performance, and security: {{code}}.” Use it on every PR.{{customer_name}} + {{issue_type}}.{{topic}} + {{audience}} + {{tone}}.{{transcript}}. Output: 1. Key decisions. 2. Action items with owners. 3. Open questions.”Custom Instructions apply globally to every chat, which is the opposite of what you want for a prompt library. Custom GPTs let you build full mini-agents, which is overkill for a reusable prompt template. AI Toolbox's prompt library sits between: short, parameterized prompts that you trigger with // anywhere inside ChatGPT and fill in the variables on the fly.
Type // at the start of any ChatGPT message input. A popup appears listing your saved prompts, sorted by relevance to what you've typed after //. Pick one with arrow keys or click it. The prompt's content is inserted into the input, with {{variable}} placeholders highlighted so you can fill them in before sending.
Anywhere you put {{variable_name}} inside a saved prompt, the prompt becomes a template instead of a static block. When you trigger the prompt with //, those placeholders stay highlighted so you can replace them with the right values for this specific use case. A 'Cold email opener' prompt with {{recipient_name}}, {{company}}, and {{value_prop}} variables turns one saved prompt into hundreds of contextual emails.
Free includes 5 saved prompts in your personal library, plus full access to the community Prompt Library (read-only). Premium ($9.99/month or $99 one-time Lifetime) removes the limit on saved prompts and enables favoriting, sorting, and category filtering.
Both. The Prompt Library modal includes a curated public library organized by category (Marketing, Engineering, Support, Content, Productivity, Research, and more). You can search it, filter by category, and one-click save any prompt into your personal library for use with the // shortcut. Your own saved prompts are private and stored locally in your browser.
Yes. Open the Prompt Library, click your prompt, and the right-side panel shows full content with edit controls. You can rename it, change the category, edit the content, add or remove {{variables}}, and save. The change applies immediately to the next time you trigger it with //.
20,000+ users. 4.5/5 on the Chrome Web Store. Free for 5 saved prompts plus the entire public Prompt Library. Premium starts at $9.99/month or $99 one-time Lifetime for unlimited saved prompts and favorites. 14-day money-back guarantee, subject to refund policy.
Want to chain multiple prompts together for full automation? See Prompt chaining with the .. shortcut. For all three modules in one purchase, see All Access Lifetime ($149).