Loupely Lens› Loupely vs. Competitors› CSS Peeper
CSS Peeper is built for designers who want to know what fonts and colors a site uses. If you’re a site owner trying to fix something that looks wrong, that information doesn’t tell you what to do next. Loupely Lens does.
Loupely Lens› vs. Competitors› CSS Peeper
CSS Peeper shows you the styles.
Lens tells you why yours didn’t work.
7-day free trial No card required Any website in Chrome
CSS Peeper is a style inspector for designers. Its audience is curious, not stuck.
CSS Peeper is a Chrome extension with 500,000+ users. You click on any element on any website and instantly see its styles: the font, the color, the spacing, the border radius. It also surfaces all colors and assets used across the page in one panel. It’s built for designers who are inspecting a site they admire, want to match, or are trying to understand. The core use case is curiosity: what font is that? What color is that button?
That’s a real and useful thing. A designer building a new site who wants to replicate a layout, check a type scale, or extract a color palette is well served by CSS Peeper. The tool is fast, clean, and free. It does exactly what it says. The assumption baked into it is that you are inspecting, not diagnosing. You already like what you’re seeing, and you want to know more about it.
What CSS Peeper doesn’t do: it doesn’t classify where each rule came from, it doesn’t explain why one rule is overriding another, it doesn’t traverse the ancestor chain, and it doesn’t tell you what to change to fix a problem. It shows you what styles are applied to an element right now. If you’re a designer who wants to know what a site uses, that’s enough. If you’re a site owner whose change isn’t working and you don’t know why, it’s information without a direction.
Your button is still the wrong color. You changed the setting. Nothing happened. Here’s what each tool gives you.
Same element. Same problem. Same moment.
The button shows background-color: #2563EB. But you changed it to orange in your theme settings. So why is it still blue?
CSS Peeper showed you the color the browser is rendering. Lens found the plugin rule forcing that color and showed you exactly what to paste to override it.
CSS Peeper answers: what is here? Lens answers: why isn’t my fix working?
| Capability | CSS Peeper | Loupely Lens | |
|---|---|---|---|
| Click on any element to see its styles instantly | |||
| Works on any website in Chrome | |||
| Shows all colors and assets used across the page | |||
| Previews your target value on the live page, then tells you whether it would hold | |||
| Classifies where each rule came from: theme, page builder, plugin, inline, browser default | |||
| Identifies which rule is winning and which rule is losing | |||
| Reads the full ancestor chain to find parent constraints causing layout failures | |||
| Real human terms diagnosis: exactly why the element looks wrong | |||
| Ready-to-paste CSS fix for your Custom CSS field | |||
| Works without knowing what to do with the CSS you’re looking at |
CSS Peeper is for designers who are curious. Lens is for site owners who are stuck.
The distinction isn’t quality. Both tools do their job well. The jobs are different.
You’re a designer inspecting a site you want to learn from
CSS Peeper is the right tool for designers who want to know what a site is doing visually: what font it’s using, what the exact color values are, what spacing it applies, what assets it loads. If you’re building something new and want to understand an existing site’s choices, CSS Peeper answers that fast.
Something on your site looks wrong and you need it fixed
You changed the color in your page builder. Refreshed. Still wrong. You installed a plugin and something shifted. You added a CSS rule and nothing happened. Lens doesn’t show you what styles exist, it tells you which one is causing the problem and what to change. One click on the element. One answer.
You need to hand off a visual bug to a developer
CSS Peeper shows you what styles an element has. Lens gives you a structured capture file with origin classification, the full ancestor chain, and the competing rules: everything a developer needs to write the fix on the first try, without coming back to ask follow-up questions.
It shows you what the browser applied. Not why your change didn’t work.
CSS Peeper is built for people who want to understand what a site is doing, not fix what their site isn’t doing. It doesn’t classify where rules came from, doesn’t identify which rule is overriding yours, and doesn’t traverse the ancestor chain. It’s an inspection tool. Diagnosis is a different problem.
Common questions about Loupely Lens vs. CSS Peeper.
I already use CSS Peeper. Do I need Lens too?
They solve different problems. CSS Peeper is for when you’re inspecting something on purpose: researching fonts, colors, or design decisions on a site you like. Lens is for when something on your own site looks wrong and you need to know why. If you do both things, both tools earn their place.
CSS Peeper shows me the element’s styles. Can’t I just use that to figure out what’s wrong?
Sometimes. If the problem is on the element itself and the cause is obvious from looking at the values, yes. But most CSS problems that are hard to fix aren’t on the element, they’re above it: a parent constraint, a plugin rule with higher specificity, or a style written directly onto the element by JavaScript. CSS Peeper shows you what the browser is rendering. It doesn’t tell you which rule is winning and why, or what the ancestor chain is doing. That’s what Lens reads.
Does Lens work on any website, or just WordPress?
Any website in Chrome. WordPress, Shopify, Webflow, Squarespace, Framer, custom builds. If you can open it in Chrome, Lens can read it.
What does Lens actually cost?
The 7-day trial starts on your first diagnosis, no card required. After that, Lens Annual is $49/year for unlimited diagnoses on any website in Chrome.
Does Lens tell me the exact CSS rule to paste?
Where it’s safe to do so, yes: a ready-to-paste CSS override for your Custom CSS field is included in the diagnosis output. Lens also tells you specifically what’s causing the problem and where it’s coming from, so you know what you’re changing and why. If the fix is a settings change rather than a CSS rule, it tells you that instead.
Click on what looks wrong. Finally know what is causing it.
7-day free trial, no card required. Unlimited diagnoses with the annual plan.