A different approach to visual validation. Both tools point at the
gap between Figma and the live page — this is what we do
differently, and why.
PerfectPixel has earned its place. This page
explains how we differ — so you can pick the right
tool for your workflow.
What we do differently
Four decisions that make
Uiprobe a different tool.
We didn't set out to build a faster overlay. We set out to read the page, read
the frame, and tell you what diverges — with values, not vibes.
01
We run the comparison for you.
Uiprobe reads the live DOM, talks to the Figma frame, and runs the diff
itself. You get back findings — what diverged, where it lives in the code,
and by how much. No squinting at an overlay to tell whether something's
a pixel out.
Vs.
Overlay tools put a screenshot on top of the page and leave the judgment to your eye.
02
We connect to Figma directly.
Paste a frame URL. We pull the frame from Figma. When the designer
pushes a change, the next probe reflects it — no re-export, no stale
screenshot, no asking the designer to send you a fresh PNG.
Vs.
Workflows that require exporting an image and uploading it before each check.
03
We give you exact values.
Every finding shows the expected value from the frame and the actual
value on the page, side by side, in mono. Typography, color, size, spacing
— read off both ends of the comparison so the conversation is about the
number, not the eye that saw it.
Vs.
Tools that show alignment without surfacing the underlying numbers.
04
We keep every probe.
Each run is saved as an immutable version. Re-run after a fix and the
new probe sits next to the previous one with a delta of what cleared and
what still diverges. You build a record of what changed without taking a
single screenshot.
Vs.
Point-in-time checks where the comparison disappears when you close the tab.
Annotated spec sheet
The whole comparison
in one read.
Aspect by aspect. Plain values. No scoring. Read the row that matters most
for your team and ignore the rest.
Uiprobe
PerfectPixel
Figma integration
paste frame URL
Direct connection. No export step.
manual upload
Export the frame as PNG, upload into the extension.
Detection method
automated
Findings surfaced for you, grouped by category.
manual overlay
You judge the difference by eye.
Exact delta values
expected → actual
Per finding, in mono. No ambiguity about what diverged.
not provided
The overlay shows alignment; the values are not surfaced.
Version history
every run saved
Re-run after a fix and read the delta against the previous run.
sessionno history-based
Each session is point-in-time.
Localhost & staging
via Chrome extension
Runs on any page Chrome can open — including pages behind login.
any page in Chrome
Same browser-native reach.
Setup
sign in with Figma
paste URL
Two steps. Then you're running probes.
export image
upload to extension
Two steps per check, repeated each time the design changes.
Free tier
10 probes / month
Free forever. No ads. Personal use.
free, ad-supported
No probe cap. Includes ads in the UI.
Who we built this for
If you check the same
screens more than once,
this is what we built.
Uiprobe fits a specific kind of workflow. Simpler tools exist for simpler
needs but if any of this sounds like the work you do, you're the reason
this exists.
01
You probe the same screens through a fix-and-recheck loop, and you want a record of what changed run to run, not a
screenshot folder.
02
You'd rather argue about a number than a feeling. Expected vs
actual values beat "looks about right" every time.
03
Most of the pages you need to check live on localhost or behind a
login. A public-page-only tool isn't enough.
04
You've got a Figma seat and you want the design source pulled
in directly, not copied, exported, or re-uploaded each time
it changes.
Why we built it
We got tired of measuring by hand.
We're two builders shipping product UIs. The tools we had let us
see something was off, they didn't tell us what, where, or by how
much. So we built the one we wanted. If you've felt that same
friction, Uiprobe is for you.
Stop pixel-peeping by hand.
Free to start. No credit card. See your first comparison in under a minute.
