HubSpot DevTools for Chrome and Firefox
A browser extension for HubSpot CMS developers. Quick access to debug parameters, cache busting, and HubL documentation — all from your browser toolbar.
— or —
Drag to compare dark and light themes
Built for HubSpot Developers
Debug Mode Toggle
Quickly add hsDebug=true to your current page with one click.
Cache Buster
Add hsCacheBuster timestamp to bypass HubSpot caching instantly.
BackOffice Dev Mode
Enable developerMode=true for HubSpot backend debugging.
Auto-apply to Links
Automatically propagate debug parameters to all internal links on the page.
HubL Quick Links
Fast access to HubL documentation — Functions, Variables, Filters, Loops, If Statements, and HubDB.
Design Manager
One-click access to HubSpot Design Manager from any page on your portal.
Under Review: The extension for Chrome and Firefox is currently under review on their respective marketplaces. We'll update the download links as soon as they're approved. In the meantime, you can install the extension manually by following the instructions below.
Manual Installation
Chrome
- Download the latest release from GitHub Releases
- Unzip
hubspot-devtools-chrome-*.zip - Open
chrome://extensions/ - Enable "Developer mode"
- Click "Load unpacked" and select the folder
Firefox
- Download the latest release from GitHub Releases
- Open
about:addons - Click the gear icon
- Select "Install Add-on From File..."
- Select
hubspot-devtools-firefox-*.zip
Open Source & Community Driven
HubSpot DevTools is free, open-source, and built with love. We welcome contributions, bug reports, and feature suggestions from the community.
Privacy First
This extension does not collect, store, or transmit any personal data. Zero tracking, zero analytics, zero telemetry.
Read our Privacy Policy