---
title: "LockLLM - Free Prompt Injection Scanner – Chrome extension stats, history and permissions"
description: "29 users, rated 5.00 by 3 people. Version 1.0.0, updated 2026-02-08. Requests 3 permissions."
url: "https://extensiontracker.com/extension/mpjcbigjfhdodnflcjgnmiaepfffbdhd"
---

# LockLLM - Free Prompt Injection Scanner

Live in the Chrome Web Store.

- Users: 29
- Rating: 5.00 from 3 ratings
- Last checked: 2026-11-08 13:58 UTC
- Users gained in 7 days: +5
- Users gained in 30 days: +5 (+20.8%)
- Rank by users: #106,337 of 292,125 live extensions
- Rank in Privacy & Security: #1,656 of 5,694

## The listing

What the Chrome Web Store shows, as of the last check.

Summary from the listing:

> Protect your AI apps and agents from prompt injection, jailbreaks, and malicious attacks. Works for ChatGPT, Claude, and all LLMs.

- Extension ID: `mpjcbigjfhdodnflcjgnmiaepfffbdhd`
- Developer: [CyberGuard](https://extensiontracker.com/developer/uad516eac73e3829386626a0a85a329fe)
- Enhanced Safe Browsing: Trusted ([what this means](https://extensiontracker.com/enhanced-safe-browsing))
- Category: [Make Chrome Yours › Privacy & Security](https://extensiontracker.com/category/make_chrome_yours/privacy)
- First published: 2026-01-19
- Last updated: 2026-02-08
- Version: `1.0.0`
- Size: 50.48 KiB
- Minimum Chrome: 88
- Languages (1): English
- Website: `lockllm.com`
- Support page: `https://www.lockllm.com/contact`
- Chrome Web Store: <https://chromewebstore.google.com/detail/lockllm-free-prompt-injec/mpjcbigjfhdodnflcjgnmiaepfffbdhd>
- View its code or download CRX: <https://crxpeek.com/extension/mpjcbigjfhdodnflcjgnmiaepfffbdhd>
- Search Google for the ID: <https://www.google.com/search?q=%22mpjcbigjfhdodnflcjgnmiaepfffbdhd%22&tbs=li:1>

## Users over time

One row per check, newest first, as shown on the Chrome Web Store.

| Checked | Users | Rating | Ratings |
| --- | ---: | ---: | ---: |
| 2026-11-08 | 29 | 5.00 | 3 |
| 2026-10-07 | 24 | 5.00 | 3 |
| 2026-09-27 | 23 | 5.00 | 3 |

## What changed

Every change found on a check, newest first.

No changes found since tracking began on 2026-09-27.

## Developer history

Moves to another publisher account and new contact emails, newest first.

No move to another account and no new contact email since tracking began on 2026-09-27.

We know contact emails only by a keyed hash, so they're never shown. Recent changes: [Account and contact changes](https://extensiontracker.com/owners/).

## What it can access

From the extension's manifest, in plain language.

**Every website:** it can read and change your data on all the sites you visit.

### Sites where it runs scripts

- `<all_urls>`: Every website

### Browser features

- `contextMenus`: Add items to the right-click menu
- `notifications`: Show notifications
- `storage`: Save settings and data in your browser

## More from this developer

Other extensions from the same publisher account.

| Extension | Users | Rating | Ratings | Category |
| --- | ---: | ---: | ---: | --- |
| [Chrome Adblocker – The Best Free Ad Blocker for Chrome](https://extensiontracker.com/extension/lkkgipilkomddkgemojeoihpejmjhngp) | 858 | 3.50 | 4 | Workflow & Planning |
| [Chrome Coupon Finder – Find & Apply Discount Codes with One Click](https://extensiontracker.com/extension/mcjkhngabfbkfbhbinmkfngdpnhhbgee) | 671 | 5.00 | 2 | Tools |
| [Paywall Detector for Chrome – Detect Subscription-Only or Premium Content](https://extensiontracker.com/extension/mhlblfdghhidoigdbkgmigllgobkodjc) | 577 | 3.67 | 3 | Tools |
| [Tab Snoozer – Save Memory & Battery by Pausing Inactive Tabs](https://extensiontracker.com/extension/mpoolpoofcfeebfameikimddlgoidjaj) | 462 | 5.00 | 3 | Tools |
| [CyberGuard - Online Privacy & Security Protection](https://extensiontracker.com/extension/pdjhbfcjjkcliolkalcpmebeenoheooc) | 339 | 5.00 | 3 | Privacy & Security |
| [Chrome Highlighter — Free Text & Word Highlighter for Webpages](https://extensiontracker.com/extension/ceddnlkajdcfodefgajlppbolidamkgh) | 230 | 3.67 | 3 | Tools |
| [Chrome Shortcuts – Open Sites & Pages Instantly via Custom Keyboard Hotkeys](https://extensiontracker.com/extension/hipkagfeegahnkomdehfkifceljdagma) | 125 | 4.80 | 5 | Tools |
| [Autofiller Pro — Personalized Form Filler for Chrome](https://extensiontracker.com/extension/ngdmigpdeoegjlaeambdpcajnihpdemd) | 78 | 5.00 | 2 | Tools |
| [Clipboard History – Best Clipboard Manager for Chrome](https://extensiontracker.com/extension/fopdljiilkcjofkbpmbibnlgdioijgja) | 5 | 5.00 | 2 | Tools |

All 10 extensions by [CyberGuard](https://extensiontracker.com/developer/uad516eac73e3829386626a0a85a329fe).

## About this data

Collected from the extension's public Chrome Web Store listing. It's checked every month, and again whenever a new version appears. Last checked 2026-11-08 13:58 UTC; next check around 2026-12-08.

How the data is collected: <https://extensiontracker.com/methodology>.

## Cite this page

Extension Tracker. “LockLLM - Free Prompt Injection Scanner” (mpjcbigjfhdodnflcjgnmiaepfffbdhd). Chrome Web Store data, last checked 2026-11-08. https://extensiontracker.com/extension/mpjcbigjfhdodnflcjgnmiaepfffbdhd. Accessed 2026-11-13.

```bibtex
@misc{extensiontracker_mpjcbigjfhdodnflcjgnmiaepfffbdhd,
  title   = {LockLLM - Free Prompt Injection Scanner (mpjcbigjfhdodnflcjgnmiaepfffbdhd)},
  author  = {{Extension Tracker}},
  year    = {2026},
  note    = {Chrome Web Store data, last checked 2026-11-08},
  url     = {https://extensiontracker.com/extension/mpjcbigjfhdodnflcjgnmiaepfffbdhd},
  urldate = {2026-11-13}
}
```

---

From Extension Tracker, a public record of the Chrome Web Store: <https://extensiontracker.com/extension/mpjcbigjfhdodnflcjgnmiaepfffbdhd>. It isn't affiliated with Google. The data is free to reuse under CC BY 4.0 (<https://creativecommons.org/licenses/by/4.0/>), crediting Extension Tracker. Every page except search comes as Markdown too: add `format=md` to the address, as in `https://extensiontracker.com/extension/{id}?format=md`.