Save tokens. Be secure. Write better prompts. It's got a haKC button.
Users
17
0 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#160K
#134K among extensions
Version
23.2
updated 10 Dec 2025
Users
monthly, 10 months
Latest, 15 Oct 2026:17 usersMove the mouse over the chart for any month
Ratings count
monthly, 10 months
Latest, 15 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About Prompt haKCer
Automatically compress AI prompts by 15-90% while preserving their original meaning. This reduces token usage, decreases API costs, accelerates response times, and frees up context window space.
Example
Original: "Could you please help me? I was wondering if you could provide a detailed explanation of how machine learning works. I would really appreciate it if you could include some examples."
Optimized: "Explain machine learning with examples."
Features
- Optimization Engine
- 50+ CARE/CRAFT based and security focused rules targeting filler words, redundant phrases, and verbose constructions
- Five compression levels from light editing to aggressive compression
- Custom regex rules for specialized workflows
Compatibility
- Works with all AI chat interfaces, including custom and local
- Add custom sites using configurable CSS selectors
- Standalone popup mode for use on any page
Analytics Dashboard
- Real-time token counts and compression ratios
- Cost projections based on current API pricing
- Energy savings displayed as relatable comparisons
Usage
- Navigate to any supported AI chat platform
- Type your prompt in the input field
- Click the haKC button or press Ctrl+Shift+O
- Review and apply the optimized version
Privacy
- All processing runs locally in your browser.
- Prompts never leave your device.
- No data collection, no external servers. - Open source and auditable.