When shopping online, it can be tough to know if you’re getting the best deal possible without checking other websites for price comparisons and promo codes—unless you use technology to your advantage. Here are 11 browser plugins that promise to save you money every time you fill up that digital shopping cart.

1. HONEY

Honey automatically searches the web for promo codes and coupons as you shop around. The extension works with over 30,000 retailers and compares prices across multiple websites and merchants, including Amazon. The plugin even lets you know when product prices will drop.

Available for: Google Chrome, Mozilla FireFox, Microsoft Edge, Apple’s Safari

2. AMAZON ASSISTANT

If you’re an avid Amazon shopper, then you should consider installing the Amazon Assistant browser add-on. It not only compares prices for products found on the website, but it also alerts you about Amazon deals and discounts via push notifications. You can also manage or share your wish lists, while staying up-to-date on your orders and deliveries.

Available for: Google Chrome, Mozilla FireFox, Safari

3. GUMDROP BY GOODSHOP

Goodshop is a coupon search engine that looks for the best deals that will save you the most money on your purchases. As a bonus, Gumdrop by Goodshop donates a portion of most of your transactions to the charity or school of your choice, from over 114,000 nonprofits and schools.

Available for: Google Chrome, Mozilla FireFox, Safari

4. INVISIBLE HAND

If you’re planning a big trip, Invisible Hand will help you find the lowest prices on flights, hotels, and rental cars across almost 600 airlines and nearly 700 retailers. The extension will also let you know about cheaper deals from other websites and services across the Internet.

Available for: Google Chrome, Mozilla FireFox, Safari

5. PRICEBLINK

Not only does PriceBlink scour the Internet to find you the best coupons, it also lets you compare prices across thousands of websites, read customer reviews, and create a wishlist for items you’d like to buy in the future. It even adds shipping costs and sales tax to your total purchases, so you can see how much you’re spending on the entire transaction before you buy, not just the product itself. The extension works for online retailers in the U.S. and the UK.

Available for: Google Chrome, Mozilla FireFox, Safari

6. THE CAMELIZER

Are you a frequent Amazon.com, NewEgg, or BestBuy.com shopper? The Camelizer price tracker can help you save money by providing the entire price history on any products and also alert you when the price drops. The add-on even works internationally, including in Canada, the United Kingdom, Spain, Germany, France, Italy, Japan, and China.

Available for: Google Chrome, Mozilla FireFox, Safari

7. EBATES

Want to receive cash back from more than 2500 online retailers? The “Cash Back Button” from Ebates lets users get cash back directly from the store’s website. It keeps track of all savings and how much you’ve earned, so you can decide when to cash out. It also searches for the best coupons and promo codes to use for all of your transactions.

Available for: Google Chrome

8. SWAGBUCKS

Swagbucks offers up a chance to earn rewards by doing things you would normally do online anyway, like watch videos, shop, and search for product information. You can then redeem your rewards for gift cards from a variety of vendors like Walmart, Amazon, or Paypal.

Available for: Google Chrome, Safari

9. COUPONCABIN SIDEKICK

When you’re about to check out, CouponCabin Sidekick goes to work looking for any available coupons to use for your purchases. It promises to work with over 18,000 online retailers and gives users the chance to earn up to 10 percent cash back. The plugin even offers $2 for free, just for adding it to your browser.

Available for: Google Chrome, Mozilla FireFox, Internet Explorer [EXE], Safari

10. FAKESPOT

With FakeSpot, you’ll never wonder if a product is too good to be true again. The extension detects bogus customer reviews and alerts you about which write-ups can be trusted and which are pure fiction.

Available for: Google Chrome, Mozilla FireFox, Safari

11. CENTLY

Cently lets you know when there is a promo code available for that product you’re about to purchase. Unlike its competitors, this extension quietly runs in the background until you’re ready to check out. It even automatically plugs in the promo code for you, saving you a few steps in the process.

Available for: Google Chrome