mrrlens
Sign in
Chrome extensionwhat they say

Library Sniffer

Sniff web framework and javascript libraries run on browsing website.

★★★★☆4.1 (95) · 10k+ users
Free
Website ↗ Chrome Web Store ↗
what mrrlens sees
MRR · No price listedNo price in the listing
Opportunity—
Buyer threads · 30 d0
“Very poor known libraries list.”
#1 complaint · Missing Feature · 2 of 3 complaints read · analysed Oct 30, 2026 · source

01Revenue

No price in the listing

Store data from the Chrome Web Store listing, refreshed daily. Updated 1 d ago.

02Why users leave Library Sniffer

Missing Feature2 reviews · 2 of 3

Known-library list is too limited; users report Angular is not detected.

“Very poor known libraries list.” source ↗
1 more complaint, with verbatim quotesIncluded in the day pass and Pro.
Unlock

Sample: 3 recent complaints (1–3★ reviews) · clustered Oct 30, 2026 · complaints from Sep 2018–Jul 2023, none in the last 24 months — history, not today · each review labelled by a model, quotes verbatim

03How to build a better Library Sniffer

Build difficultyMediumMain factors: Chrome Web Store policy approval and maintaining accurate library signatures; no payments or hardware.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
Unlock

04Who wants a better Library Sniffer

0 buyer threads in the last 30 days name Library Sniffer.

05Questions about Library Sniffer

How much revenue does Library Sniffer make?

Library Sniffer's listing publishes no price and no paid plan, so MRRLens shows no revenue estimate. It may still charge on its own website; a founder can verify the real figure.

What do users complain about most in Library Sniffer?

Across 3 recent complaints, the most common is missing feature (2 of 3). Known-library list is too limited; users report Angular is not detected.

What are the best Library Sniffer alternatives?

The closest alternatives MRRLens found are Wappalyzer, WhatRuns and BuiltWith Technology Profiler. The full list, with why users leave, is on the Library Sniffer alternatives page.

How many people use Library Sniffer?

Library Sniffer lists 10k+ users on the Chrome Web Store, rated 4.1 (95).

See the full x-ray of Library Sniffer

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.