Free Chrome Extension

Don't get fooled
by fake reviewsThe free fake review checker for Amazon, Walmart, eBay and Etsy

ReviewLens instantly detects manipulation patterns, suspicious rating clusters, and fake buyer behavior - then cross-checks with real Reddit community sentiment.

✓ No account needed
✓ No personal data collected
✓ 100% free
Rated 5.0 on the Chrome Web Store (4 ratings)
ReviewLens
Fake Review Detector
Amazon
F0/100
Overall Trust Score
Review Authenticity32
Reddit Sentiment28
✕Sudden review spike detected
✕94% five-star ratings - unusual
✓No Reddit discussions found
Reddit Sentiment
28/100
Mostly negative5 discussions
r/amazonreviewsr/fakespotreviewsr/consumeradvice
r/amazonreviewsnegative↑342
This product has tons of fake 5-star reviews - beware
r/consumeradvicenegative↑187
Bought this and it broke after 2 days, reviews are misleading
r/fakespotreviewsnegative↑95
Classic review manipulation - 200+ reviews in one week
Price History
$24.99
↓ Dropped
4
Platforms Supported
6
Checks per Product
Live
Reddit Sentiment
100%
Free Forever
How It Works

Analysis in seconds,
not hours

ReviewLens works silently in the background. One click is all it takes.

Step 1
Navigate to any product
Browse Amazon, Walmart, eBay, or Etsy as you normally would. ReviewLens detects product pages automatically.
Step 2
Click the extension icon
Hit Analyze and ReviewLens fetches review data, checks Reddit for real discussion, and runs its review-pattern checks.
Step 3
See your trust score
Get a clear A-F grade with a detailed breakdown of every red flag found - and a price trend history as you revisit over time.
Detection Engine

Six checks.
One verdict.

Check 1
Review Burst Detection
Flags weeks where reviews spike to more than five times the usual rate, a classic sign of a bought review campaign.
Check 2
Rating Clustering
Flags products where more than 80% of ratings are 5 stars and almost none are 2 or 3 stars, a spread real buyers rarely produce.
Check 3
Verified Purchase Ratio
Measures how many reviews come from verified buyers. When more than 40% are unverified, the grade drops.
Check 4
Short, Generic Reviews
Flags listings where most reviews are under 10 words: cheap to fake, and they tell you nothing about the product.
Check 5
Sample-Size Check
Fewer than 5 readable reviews? ReviewLens tells you the sample is too small instead of inventing a confident grade.
Check 6
Reddit Community Check
Searches Reddit for real discussion of the product, filters out 60+ off-topic communities, and weighs each thread by how clearly it's about this product.
Bonus
Price History Tracking
Records the price every time you visit a product. Over time, reveals whether that 'sale' is genuine or an inflated fake discount.
Live Analysis

See what's
really going on

Every signal is weighted and combined into a single, honest trust score. No guesswork - just data.

F0/100
Suspicious Product
3 red flags detected · Low trust
Review Authenticity28%
Verified Purchases41%
Reddit Sentiment50%
Rating Distribution18%
A0/100
✓ Highly Trustworthy
All signals pass · Buy with confidence
Review Authenticity95%
Verified Purchases92%
Reddit Sentiment88%
Rating Distribution87%

Same category, different trust scores.
ReviewLens tells you which one to buy.

Scoring Methodology

How your trust score
is calculated

No black boxes. Here's exactly how ReviewLens turns raw review data into a score you can trust - explained in plain English.

The Formula

Two independent sources.
One combined score.

We analyse the product's own reviews for red flags (70% weight) and cross-check with real Reddit community discussions (30% weight). The two scores combine into your final trust grade.

70% Review Analysis30% Reddit Sentiment
72
Review Score
×0.7+
85
Reddit Score
×0.3=
76
Trust Score
With fewer than 5 readable reviews, the review half is held at a neutral 50 and flagged
Review Analysis
4 checks plus a sample-size guard
Review burst detection
One week with more than 5x the usual reviews (and over 20) is a red flag
Rating clustering
Over 80% five-stars with under 5% two- and three-stars isn't natural
Verified purchase ratio
Over 40% unverified reviews costs points; over 60% costs more
Short, generic reviews
When most reviews are under 10 words, they say nothing real
Sample-size guard
Too few reviews to judge? You get a warning, not a fake-confident grade
Each red flag subtracts points from 100: 25 for a high-risk flag, 15 for medium and 8 for low. The full method is public: how ReviewLens scores reviews.
Reddit Cross-Check
Independent community verification
Smart product matching
Uses product ID, brand name, and key nouns - not just the full title
Relevance scoring
Every Reddit post gets a relevance score. Low-relevance posts are filtered out
Spam subreddit filter
60+ deal-posting, meme, and off-topic subreddits are blocked automatically
Top threads first
Threads are sorted by upvotes so you can read the most-discussed ones yourself
Relevance-weighted sentiment
Threads clearly about this product move the score more than passing mentions
Positive/negative language
We scan each post for sentiment signals using word-boundary keyword matching
If no Reddit posts are found, the sentiment defaults to 50 (neutral) so the product isn't unfairly penalised. The score is then driven entirely by review analysis.
Score to Grade
A
80-100
Highly trustworthy - buy with confidence
B
65-79
Mostly trustworthy - minor concerns
C
50-64
Mixed signals - read reviews carefully
D
35-49
Suspicious - several red flags detected
F
0-34
Avoid - strong manipulation signals
Confidence matters: Products with fewer than 10 reviews show a "low confidence" badge. The score is pulled towards 50 (neutral) to avoid misleading you when data is limited.
All data stays in your browser. Scores, price history, and analysis results are stored in chrome.storage.local - a secure storage area managed by Chrome itself. Nothing is sent to our servers because we don't have any.
Reddit Cross-Check

Real people.
Real opinions.

While star ratings can be gamed, Reddit discussions rarely lie. ReviewLens scans thousands of subreddits to surface what the community actually thinks - the good and the bad.

Analysis summary
75%positive
Threads found4
Total upvotes5,572
✓ Positive3
✗ Critical1
r/BuyItForLife· 8 months ago
▲ Positive97% match

Finally found a water bottle that actually lasts - 3 years and zero issues

"Been using this for hiking and daily commute. The seal is still perfect, no rust, no smell. Honestly the best $28 I've spent."

2,847upvotes
143 comments
r/Frugal· 5 months ago
▲ Positive91% match

This product is genuinely excellent - bought three as gifts

"Not an ad, just genuinely impressed. My whole family uses these now. Way better than the branded ones at twice the price."

1,204upvotes
67 comments
r/mildlyinfuriating· 2 months ago
▼ Critical84% match

Why does the lid on this thing crack after 6 months? Third time replacing it.

"Love the bottle but the lid design is genuinely terrible. Every single one I've had has cracked at the hinge. Check the 1-star reviews - all the same issue."

889upvotes
214 comments
r/ZeroWaste· 4 months ago
▲ Positive78% match

Switched to this from plastic - highly recommend for eco-conscious folks

"Durable, easy to clean, and the company uses recycled packaging. A few people in comments mentioned the lid issue but mine has been fine so far."

632upvotes
41 comments
Spam-filtered - deal-posting and affiliate subreddits excluded
Weighted by upvotes - more votes = more influence on score
Relevance-scored - ASIN, brand & product noun matching
Platform Support

Works everywhere
you shop

Amazon
  • ✓ ASIN detection
  • ✓ Review burst
  • ✓ Rating clustering
  • ✓ Verified ratio
  • ✓ Reddit + price
Walmart
  • ✓ Item ID detection
  • ✓ Review API data
  • ✓ Star distribution
  • ✓ Verified ratio
  • ✓ Reddit + price
eBay
  • ✓ Item ID detection
  • ✓ Catalog reviews
  • ✓ Rating clustering
  • ✓ Generic filter
  • ✓ Reddit + price
Etsy
  • ✓ Listing ID detect
  • ✓ Verified (all)
  • ✓ Rating histogram
  • ✓ Generic filter
  • ✓ Reddit + price

Stop trusting
fake 5-star reviews

Install ReviewLens for free and shop with confidence. Available on Chrome - works on Amazon, Walmart, eBay, and Etsy.

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