The main Chrome extensions for comparing Figma designs to live websites are PerfectPixel and Pixelay for overlay comparison, Over.fig for overlay with CSS inspection, and Uiprobe for automated property-level comparison with overlay, split, and diff views. Each works differently: overlay extensions stack the design on top of the page and rely on you to spot differences visually, while property-level extensions read CSS values from the page and Figma properties from the design, then surface specific deviations automatically. All of them work on localhost.
Not all comparison extensions work the same way, and the differences affect how useful they are in practice.
Figma connection. Some extensions connect to Figma directly and pull the design in real time. Others require you to export a screenshot and upload it manually. A live Figma connection means the comparison always uses the current design. Manual upload means you re-export every time the design changes.
What it detects. Overlay extensions show you two layers stacked. You scan visually and try to spot what is off. When you find something, you still need to inspect the element, identify the wrong property, and compare it against the Figma spec. Property-level extensions do that comparison automatically and tell you exactly which properties diverged and by how much.
Alignment. With overlay extensions, you position the design layer over the page manually. If the page has a sticky header, a cookie banner, or any layout shift, you reposition. Some extensions handle this better than others, but it is always a manual step. Property-level extensions that read page structure can align automatically.
Localhost support. If you want to compare during development rather than after deployment, the extension needs to work on localhost and login-gated pages. All the extensions listed here support this.
The core question is whether the extension asks you to find the differences or finds them for you.
The most widely installed design comparison extension with 350,000+ users. You upload a PNG, JPG, or SVG screenshot, position it over the page, and adjust opacity to compare visually. Includes blend modes (difference, invert, multiply, overlay) and per-domain layer persistence.
PerfectPixel has no Figma connection. You export from Figma manually and upload to the extension for each comparison. Recent updates moved scaling and multi-layer support (beyond 2 layers) behind a paid tier, and the free version shows ads in the extension panel. Users report performance slowdowns and scaling bugs in recent versions.
Approach: Overlay (manual image upload). Price: Free (limited); Pro paid.
Connects directly to Figma through a plugin and offers multiple comparison modes: overlay, side-by-side, and difference blend. No manual screenshot export needed. Includes annotations and shareable links for team collaboration.
More capable than PerfectPixel for Figma-centric workflows, but still an overlay tool. You see the layers stacked and scan for differences visually. When you spot something, you still need to figure out what the actual property difference is.
Approach: Overlay (live Figma connection). Price: Free tier (mobile viewports); Pro from $20/month.
A newer extension that combines Figma overlay comparison with CSS inspection and measurements. Bridges the gap between visual overlay and element-level inspection by giving you both the visual check and access to computed values when you click an element.
Still relies on visual scanning to find the differences, but once you spot something, the CSS inspection saves you from switching to DevTools.
Approach: Overlay + CSS inspection (live Figma connection). Price: Free (1 project, 3 screens); Pro $5/month.
An alternative to PerfectPixel with unlimited layers, scaling, and alignment tools on the free tier. No Figma connection. Same manual screenshot workflow as PerfectPixel but without the paywall restrictions on core features. Around 10,000 users.
Approach: Overlay (manual image upload). Price: Free.
Takes a different approach from the other extensions. Instead of only overlaying images, Uiprobe reads design properties from a Figma frame URL and compares them against the rendered CSS values on the live page automatically. The output is a list of specific findings: which element, which property, what the design specified, what the browser rendered. Typography, spacing, colors, and sizing are all checked without manual scanning.
Uiprobe also includes overlay, split, and diff view modes with automatic alignment between the design and the page. The alignment is handled automatically because the tool reads page structure rather than stacking two images. No manual positioning needed.
The difference from overlay-only extensions is what happens after setup. With PerfectPixel or Pixelay, the overlay is where the work begins. You scan, you spot, you inspect, you document. With Uiprobe, the findings are already there when the comparison finishes. The visual views exist for context and confirmation, not as the primary detection method.
Approach: Automated property-level comparison + overlay with auto-alignment (live Figma connection). Price: Free (10 comparisons/month); Pro $15/month.
| Extension | Figma connection | Detection method | Alignment | Layers/views | Price |
|---|---|---|---|---|---|
| PerfectPixel | No (manual upload) | Visual scanning | Manual | Overlay + blend modes | Free (limited); Pro paid |
| Pixelay | Yes (plugin) | Visual scanning | Manual | Overlay, side-by-side, diff blend | Free (limited); $20/month |
| Over.fig | Yes (extension) | Visual scanning + CSS inspect | Manual | Overlay + element inspection | Free (limited); $5/month |
| Pixel Perfect Pro | No (manual upload) | Visual scanning | Manual | Overlay (unlimited layers) | Free |
| Uiprobe | Yes (Figma frame URL) | Automated property comparison | Automatic | Overlay, split, diff + findings list | Free (10/month); $15/month |
For a fast sanity check during active development, Pixelay or Over.fig give you the overlay with a live Figma connection and no export step. If you do not use Figma, PerfectPixel or Pixel Perfect Pro work with any image file.
Uiprobe catches every measurable property deviation automatically, including differences too subtle to see in an overlay (a font weight of 400 vs 500, a 4px spacing deviation, a border color one shade off). Overlay extensions only catch what you notice visually.
Yes, all five work on localhost. Uiprobe, PerfectPixel, Pixelay, Over.fig, and Pixel Perfect Pro are browser extensions that run on whatever page is open, including local development servers and login-gated staging environments.
You do not need to. Uiprobe includes overlay, split, and diff views alongside the automated property comparison. But if you already use PerfectPixel or Pixelay for quick checks during the build, running Uiprobe before submitting for review catches what the overlay missed.
Overlay extensions are useful for confirming the general shape during development. Automated comparison is for verifying the details before review.
The core overlay feature is free, but recent updates moved scaling, multi-layer support (beyond 2 simultaneous layers), and an ad-free experience behind a Pro subscription. Users who relied on these features for free are now looking for alternatives.
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