Hermes detects when you're on a checkout page and instantly shows the best verified discount codes — one click to apply, zero effort to save.
How It Works
Hermes runs quietly in the background — just create a free account, install the extension, and start saving.
Browse any of the 30+ supported brands. Hermes runs quietly in the background and detects checkout pages automatically.
The moment you land on a checkout page, Hermes pops up with the best verified discount codes for that brand.
Hit Apply and Hermes fills the promo code field automatically. It picks the highest-rated code first so you never miss a saving.
Extension Features
Hermes combines Spotsavr's verified code database with intelligent checkout detection for seamless savings.
Hermes recognizes checkout pages across 30+ supported brands using URL pattern matching and DOM analysis — no manual activation needed.
Codes are ranked by Spotsavr's quality scoring system. The highest-performing, most recently verified code is always suggested first.
Hermes locates the promo code input field and fills it automatically. No copy-pasting, no searching, just click Apply.
Hermes does not track browsing history, collect personal data, or sell information. It only activates on supported checkout pages.
The code database is synced with Spotsavr's pipeline, so you always get the freshest verified codes — not stale databases.
Built on Manifest V3 with minimal resource usage. Hermes won't slow down your browser or interfere with page loading.
Under the Hood
Built on Chrome's latest Manifest V3 architecture for security, performance, and reliability.
Latest Chrome extension architecture with service worker background, enhanced security, and better performance.
Runs at document idle to detect checkout pages without slowing initial page load.
Caches verified codes locally for instant popup — no network delay at checkout.
Optional desktop alerts when codes are found for brands you visit frequently.
Only requests storage, tabs, cookies, and host permissions — nothing extraneous.
Available on the Chrome Web Store for easy installation and automatic updates.
Hermes is the browser extension for Spotsavr, powered by Spotbookr Inc infrastructure. Verified codes are sourced from Spotsavr's multi-platform extraction pipeline.
Install Hermes for free and start saving at checkout — just create a free Spotsavr account and you're set.
Add to Chrome — Free