Free Chrome Extension - No Account Needed

Your best AI prompts.
One click away.

Stop wasting time rewriting prompts from memory. Store them once, find them in seconds, paste them anywhere.

Add to Chrome - It's Free

Works with ChatGPT, Claude, Gemini, and any website. Takes 3 seconds to install.

You've written great prompts before.
Can you find them now?

Every AI power user has the same problem:

Prompting Ninja fixes this in under 3 seconds.

How It Works

Three steps. Zero friction.

1

Save your prompt

Store any prompt with a title, category, and tags. Or start with our curated library of 38 ready-to-use prompts.

2

Find it instantly

Search across everything - titles, content, tags. Results appear as you type. Your best prompts are always one click away.

3

Use it anywhere

Copy to clipboard or insert directly into ChatGPT, Claude, or any text field on the web. One click, done.

Features

Built for people who use AI every day

⚡

Instant search

Find any prompt in milliseconds. Search across titles, content, categories, and tags as you type.

📋

One-click copy & insert

Copy to clipboard or insert directly into ChatGPT, Claude, and standard web inputs. Clipboard fallback if insertion fails.

🏷️

Categories & tags

Organise prompts with categories and tags. Filter, sort, and browse. Default categories included - customise everything.

⭐

Favourites & recently used

Star your best prompts. Sort by recently used, most used, newest, or title. Your workflow adapts to you.

🌙

Dark & light themes

Follows your system preference or set it manually. Designed to look premium either way.

🔄

Sync across devices

Optionally sync via Chrome's built-in sync. Works across all your computers automatically.

🌍

12 languages, built in

Full UI and prompt library in English, Polish, Spanish, Portuguese, Ukrainian, French, German, Italian, Japanese, Chinese, and Arabic with RTL support.

📦

Import & export

Export your entire library as JSON. Import it on another machine. Your prompts are always portable.

🔒

Private by default

All data stays in your browser. No accounts, no tracking, no servers. Your prompts are yours.

Starter Library

39 prompts, ready to use

Start with a curated library of high-quality prompts for everyday AI work. Add your own, edit anything, build your personal collection.

Writing Analysis Business Productivity Creative Learning
Rewrite for clarity Rewrite the text below for clarity, simplicity, and flow. Keep the original meaning...
Challenge my thinking Identify weak assumptions, blind spots, missing evidence, and what a smart sceptic would say...
Turn this into an action plan Clear action plan with objective, key tasks, logical sequence, dependencies, risks...
39
Ready-to-use prompts
6
Categories
0
Data collected
100%
Free
"I use AI tools all day. Before this, my best prompts were buried across 20 different chat threads. Now I find them in seconds."
- Kris Z.
"The starter library alone saved me hours. I just added them all and started using them immediately. No setup, no friction."
- Andy L.
"Finally something that respects privacy. No account, no cloud, no tracking. Just a fast prompt library that works."
- Mia H.
"I copy-paste prompts into ChatGPT and Claude dozens of times a day. This extension cut that workflow from minutes to one click."
- Aneta M.
"Dark mode looks beautiful. The whole thing feels like it was designed by Apple. Clean, fast, and stays out of the way."
- Louis A.

Your prompts are yours

We built Prompting Ninja with a simple belief: your prompts are your intellectual property. We never see them.

FAQ

Common questions

Is it really free?

Yes, completely free. No premium tier, no trial period, no hidden costs. We built this because we needed it ourselves.

Do I need to create an account?

No. Install it and start using it immediately. No email, no sign-up, no password. Your data is stored locally in your browser.

Which AI tools does it work with?

Prompting Ninja works with any website. It can insert prompts directly into ChatGPT, Claude, Gemini, and standard text fields - including Gmail (which now includes Gemini). For any other tool, one-click copy to clipboard works everywhere.

Can I sync my prompts across devices?

Yes, optionally. Turn on Chrome Sync in settings and your prompts travel with your Chrome profile across all your computers. No account needed - it uses Chrome's built-in sync.

Is my data private?

Completely. All prompts are stored locally in your browser. We don't run servers, collect analytics, or see your data. The extension requests only the minimum permissions needed to function.

Can I import my existing prompts?

Yes. Import from JSON, or start with our curated library of 39 prompts and build from there. You can also export your entire library at any time.

What if I switch browsers?

Export your library as JSON and import it into Prompting Ninja on any other Chrome-based browser (Chrome, Edge, Brave, Arc).

Stop rewriting prompts from memory

Join AI power users who save hours every week by keeping their best prompts one click away.

Add to Chrome - Free

Takes 3 seconds to install. No account needed. Works immediately.

The Story

Built out of frustration

I'm Krystian Zajac - and I built Prompting Ninja because I was tired of losing my best prompts.

Every day I use ChatGPT, Claude, and Gemini for everything from writing to coding to strategy. And every day I'd waste time hunting through old chat threads, notes, and docs trying to find that one prompt that worked perfectly last week.

I kept rewriting the same prompts from memory. It was maddening.

So I built the tool I desperately needed: a fast, private prompt library that lives in my browser and lets me find and use any prompt in one click. No accounts, no cloud, no complexity. Just my prompts, ready when I need them.

If you use AI tools daily, I think you'll find it as useful as I do.

@krystianzajac LinkedIn