Amazon Review Checker: Spot Fake Amazon Reviews in Seconds
Check whether an Amazon product's reviews can be trusted. ReviewLens grades listings A to F on 8 Amazon stores using review patterns and Reddit.
How ReviewLens checks an Amazon listing
- Review bursts: one week with more than five times the product's usual weekly reviews (and over 20 of them).
- Five-star clustering: more than 80% five-star ratings with under 5% two- and three-star ratings, read from Amazon's full star chart.
- Unverified buyers: more than 40% of reviews without the Verified Purchase badge.
- Very short reviews: more than half of the reviews under 10 words.
- Reddit: what people say about the product in relevant threads, weighted by how clearly each thread is about it.
Each red flag costs points and the result becomes a letter grade. The thresholds and the math are all on how ReviewLens scores reviews.
Amazon-specific things to watch in 2026
Reviews no longer pool across every variation
Starting February 12, 2026, Amazon stopped sharing reviews across product variations that work differently, rolling the change out by category through May 31, 2026. Color and size variations can still share reviews; models with different performance, like a 700W and a 1200W microwave, keep their own. Before you trust a rating, check that the reviews are for the exact variation you're buying.
Vine reviews are free-product reviews
Members of Amazon's Vine program receive products for free, and their reviews are labeled as Vine reviews of a free product. They aren't fake, but read them knowing the reviewer didn't pay.
Verified Purchase helps, but isn't proof
The badge means Amazon recorded a purchase. Some paid-review schemes have people buy the product and get refunded later, so a verified review can still be bought. Treat the badge as one signal among several.
A perfect-looking star chart
Real products almost always collect some middling reviews. When nearly everything is five stars and there's almost nothing at two or three, look harder before you buy.
What our data shows on Amazon
From October 22 to November 1, 2026, ReviewLens users ran 6,302 graded checks on Amazon listings: 81% earned an A, 11% a B, 8% a C, and only 8 checks got a D or F. Amazon listings graded the cleanest of the four stores we cover. More in our fake review statistics.
Supported Amazon stores
amazon.com, amazon.co.uk, amazon.ca, amazon.de, amazon.fr, amazon.co.jp, amazon.in and amazon.com.au.
If you think the reviews are fake
- Use the Report link under a review to flag it to Amazon.
- In the US, you can report deceptive reviews to the FTC at ReportFraud.ftc.gov.
- Buy from a listing with a clear return policy, and keep the order details until you've used the product.
Frequently asked questions
Does ReviewLens work in the Amazon app?
No. Browser extensions can't run inside shopping apps. Use ReviewLens in Chrome on a computer, where it grades the product page automatically.
Which Amazon stores does ReviewLens support?
Amazon US, UK, Canada, Germany, France, Japan, India and Australia.
Why did an Amazon product get no grade?
If ReviewLens can't read any reviews and finds no Reddit discussion, it shows no grade rather than guessing. If it can read fewer than 5 reviews, it warns you that the sample is too small.
Is the Amazon review checker free?
Yes. ReviewLens is free and needs no account.
Sources
Check the next product before you buy
ReviewLens grades reviews on Amazon, Walmart, eBay and Etsy from A to F and shows what Reddit says. Free, no account.