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A PerfectPixel alternative that measures for you

PerfectPixel is a browser extension that lays a semi-transparent design image over your page so you can line things up by eye. It works, but it’s slow, and small differences in font size, colour or spacing are easy to miss. UICheck reads the frame from Figma, compares it with the built page and lists every difference in plain words.

Side by side

How it comparesUICheck: Automatically: visual areas, fonts, colours, spacing, text and fieldsPerfectPixel: By eye, with an image overlay
Design sourceUICheck: Figma frame linkPerfectPixel: An image you export and load
Font size, weight, colourUICheck: Measured from the page and the Figma filePerfectPixel: Judged by eye
Missing or changed textUICheck: ListedPerfectPixel: Spotted by eye
Overlay viewUICheck: Yes, with a draggable dividerPerfectPixel: Yes, its main feature
Responsive checksUICheck: Included on every screen sizePerfectPixel: No
Report for clientsUICheck: Plain-language fixes, share link without login, PDF and ExcelPerfectPixel: None

Based on public information, checked October 2026. Something changed? Tell us and we’ll update it.

Choose PerfectPixel if

  • You want a free overlay to nudge elements into place while coding

Choose UICheck if

  • You want design differences measured and listed
  • Your designs are in Figma
  • You want responsive and accessibility checks in the same report

Or use both

Use PerfectPixel while building a component; run UICheck’s Figma comparison on the whole page before review.

Also compare

Try UICheck next to PerfectPixel

Free account, 5 checks a day, no card. Paste a URL and see what it finds in about a minute.

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