Download the extension
Version v4.14.0 · Chrome (MV3) · ~2 MB. Manual ZIP installation - takes under two minutes. Load as an unpacked extension; works offline with cached access.
After installing, sign in on the extension or on this site - your plan unlocks automatically.
Install in six steps
Everything you need - requirements on the left, exact steps on the right.
- • Google Chrome (or Chromium-based browser like Edge, Brave, Arc) - desktop
- • Chrome 100 or newer (Manifest V3)
- • Windows, macOS or Linux
- • An OpenRouter API key for model calls (free models available)
Publish the extension to the Chrome Web Store once. From then on Chrome downloads and installs every new version automatically - users never download again. This is the only fully automatic channel for regular users.
A signed CRX + update manifest is hosted here (/api/extension/update.xml). Devices managed by policy (Windows registry, Mac/Linux external-extension JSON, or GPO) point Chrome at that URL - Chrome then auto-updates the extension like any enterprise app.
This install method cannot auto-update - Chrome's platform rule, not something a website can change. When a new version is released, the extension shows an update banner with a download link; you reload it in Chrome (settings and data are preserved). The popup always tells you when a new version is out.
The version check is live: open the extension's Updates view and it shows the latest release the moment one ships.
For organizations or advanced users who want Chrome to update the extension without any manual download, install the signed CRX via Chrome policy. Chrome then polls /api/extension/update.xml and installs new versions automatically. Current extension ID: d652b9f84bff2771e714d1f7538d9027
Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Google\Chrome\Extensions\d652b9f84bff2771e714d1f7538d9027] "update_url"="https://nano.nspark.workers.dev/api/extension/update.xml"
Path: /Library/Application Support/Google/Chrome/External Extensions/
File: d652b9f84bff2771e714d1f7538d9027.json
Content:
{ "external_update_url": "https://nano.nspark.workers.dev/api/extension/update.xml" }
Path: /etc/opt/chrome/extensions/ (system) or ~/.config/google-chrome/External Extensions/
File: d652b9f84bff2771e714d1f7538d9027.json
Content:
{ "external_update_url": "https://nano.nspark.workers.dev/api/extension/update.xml" }
First install downloads the CRX from the update URL; every later release is applied automatically by Chrome. Chrome Web Store remains the simplest path for consumer machines.
Download the ZIP
Click the Download button above. Save Image-Prompt-Extractor-v4.14.0.zip anywhere on your computer.
Extract it
Unzip the file. Keep the extracted folder - do not delete it while the extension is loaded.
Open Chrome extensions
Type chrome://extensions in the address bar, or go to Chrome menu → Extensions → Manage Extensions.
Enable Developer mode
Toggle "Developer mode" in the top-right corner of the extensions page.
Load unpacked
Click "Load unpacked" and select the extracted folder. The extension appears in your toolbar.
Sign in
Open the extension and log in (or create a free account). Your plan applies automatically.
Common issues
Common issues and the exact fix.