WhatTheCSS

WhatTheCSS

WhatTheCSS is a Chrome extension for designers and front-end developers that lets you hover over any element on a website to instantly see its authored CSS. Key features include: - Hover-to-inspect: View real declarations, pseudo-classes, and variables as you move your cursor. - Peek mode: Toggle with V to see type, colors, and WCAG contrast. - Live editing: Press Space to freeze an element into a four-tab editor (CSS, Contrast, Box, and Tree) where you can test changes live.

Visit
All-time revenue
$9

Ranked #8354 on TrustMRR

MRR
-

No active subscriptions

Founder
sandipanioSandipan Mukherjee

2,200 followers on 𝕏

Founded
-

Revenue is verified withDodoPaymentDodoPayment API key.Last updated: Oct 30, 2026, 06:06 AM

Startup insights
Value proposition

Hover any element on any website. See its CSS.

Problem solved

Provides designers and front-end developers with an instant tooltip showing the actual authored CSS of any web element, avoiding the longhand mess shown by DevTools.

Audience

Designers and front-end developers

Pricing

Free: $0 forever, Pro: $19 one-time

Domain Rating

4/100

whatthecss.dev

Ahrefs Domain Rating measures backlink profile strength on a 0 to 100 logarithmic scale.

Market

Tech stack

Screenshot

whatthecss.dev
Tap to view

Product updates

Discover more startups

Advanced Search
C

Connor Cedro SEO | Tampa SEO Consultant

Solo SEO consulting practice run by Connor Cedro, a senior SEO consultant in Tampa, FL. Technical SEO, keyword strategy, content, local SEO, and white-hat link building on month-to-month retainers. No contracts, no junior team, no outsourced work. Semrush Certified Agency Partner with a perfect 5.0 on Google. Clients like Mavilo Wholesalers have grown to 11.5K monthly organic visitors and 2,800+ ranking keywords. Retainers from $1,250/mo. Free SEO tools on the site.

Revenue (30d)

$5.8k

MRR

$6.2k

Total

$44k

FOR SALE
H

Hidden Business

Provides a simple way to scan your Shopify shop for Google Merchant Center compliance issues

Revenue (30d)

$18k

MRR

$16k

Total

$133k

FOR SALE
P

Private Enterprise

Currently in redesign with a Ukranian designer - internationnaly translated but only french market is exploited for now

Revenue (30d)

$64k

MRR

$33k

Total

$305k

DistilBook

DistilBook

Convert docs into explainer videos

Revenue (30d)

$4.8k

MRR

$2.7k

Total

$12k

FOR SALE
A

Anonymous Startup

Photo sharing app for events

Revenue (30d)

$17k

MRR

$0

Total

$557k

FOR SALE
U

Unnamed Company

A profitable subscription app solving a personal, emotionally-driven problem. No seasonality, universal demand across cultures, strong upfront willingness-to-pay. Already localized into multiple languages and live on iOS and Google Play, though those localized markets haven't been targeted yet. It ranks strongly in both traditional and AI/LLM search for several of the category's highest-intent keywords, all trending up.

Revenue (30d)

$28k

MRR

$35k

Total

$258k

The database of verified startup revenues

Browse 1,000+ verified startups for sale