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Chrome extensionwhat they say

CSS Peeper

Inspect website styles in seconds. Supercharge your workflow, and save hours of work.

★★★☆☆2.6 (476) · 500k+ users
Free
Website ↗ Chrome Web Store ↗
what mrrlens sees
MRR · Freemium · upsell unknownPrice not published
Opportunity—
Buyer threads · 30 d0
“I also recently discovered that it was injecting donation popups into websites I visited.”
#1 complaint · UX · 50% of complaints read · analysed Oct 29, 2026 · source

01Revenue

Price not publishedFreemium · upsell unknown
Why there is no estimate

CSS Peeper has a paid tier, but the listing publishes no price. Without one, any revenue figure would rest on a guessed price, so MRRLens shows none and leaves revenue out of its opportunity score.

Exploratory math, not an estimate: if it charged a typical price for its marketplace, active users × paid conversion × monthly price would give $12k–62k a month. Assumptions: active users: 500k; 0.5%–2.5% of active users pay; no public price: assumed $5.00/month, typical for this marketplace. Methodology.

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

02Why users leave CSS Peeper

UX5 reviews · 50%

Injects intrusive donation popups into visited sites, including checkout flows, with no obvious close or permanent dismissal.

“I also recently discovered that it was injecting donation popups into websites I visited.” source ↗
2 more complaints, with verbatim quotesIncluded in the day pass and Pro.
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Sample: 10 recent complaints (1–3★ reviews) · clustered Oct 29, 2026 · complaints from May 2026–Oct 2026, almost all in the last 24 months · each review labelled by a model, quotes verbatim

03How to build a better CSS Peeper

Build difficultyLowBrowser extension is technically simple; main work is Chrome store approval and privacy compliance, no payments or hardware.
Three build ideas that answer these complaintsIncluded in the day pass and Pro.
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04Who wants a better CSS Peeper

0 buyer threads in the last 30 days name CSS Peeper, and 1 more is in the same market.

05Questions about CSS Peeper

How much revenue does CSS Peeper make?

MRRLens shows no revenue figure for CSS Peeper. It sells a paid tier but does not publish the price, and an estimate built on an assumed price would be a guess. The exploratory math is on the page, labelled as such.

What do users complain about most in CSS Peeper?

Across 10 recent complaints, the most common is ux (50%). Injects intrusive donation popups into visited sites, including checkout flows, with no obvious close or permanent dismissal.

How many people use CSS Peeper?

CSS Peeper lists 500k+ users on the Chrome Web Store, rated 2.6 (476).

See the full x-ray of CSS Peeper

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