Developer · Lifetime deal
Polypane
A standalone browser to guide your web development workflow every step of the way. Built-in tools for responsive design, accessibility, meta information and so much more.
Which Polypane plan do you need?
Prices in USD, excluding tax.
| Plan A | Plan B | Plan C | |
|---|---|---|---|
| Includes | 1 User; 1 Device; Future updates on Individual plan; Accessibility tests; Syncs all the interactions; Powerful Developer Tools; Device Emulation; Detect CSS breakpoints automatically; Intelligent Live & Hot reloading for Everyone; Custom debug tools for each pane; Social Media previews; MacOS, Windows & Linux Apps; Chat & Email Support | 5 User; 2 Device; Future updates on Business plan; Accessibility tests; Syncs all the interactions; Powerful Developer Tools; Device Emulation; Detect CSS breakpoints automatically; Intelligent Live & Hot reloading for Everyone; Custom debug tools for each pane; Social Media previews; MacOS, Windows & Linux Apps; Chat & Email Support | 10 User; 2 Device; Future updates on Business plan; Accessibility tests; Syncs all the interactions; Powerful Developer Tools; Device Emulation; Detect CSS breakpoints automatically; Intelligent Live & Hot reloading for Everyone; Custom debug tools for each pane; Social Media previews; MacOS, Windows & Linux Apps; Chat & Email Support |
What is Polypane?
Your website needs to seamlessly work on iPhone, Android phones, iPads, Tablets, Laptops, Desktops, 4K screens, 5K screens, TVs…
The list is never ending. But you get the point.
Your websites need to be responsive, compatible, accessible across all the devices & browsers to keep your visitors engaged.
Without engagement, your SEO & Conversions are sure to go down the hill. It’s time to fix all of that with a single tool.
Polypane is your desktop browser that shows your site in multiple viewports at the same time, and keeps them all in sync, provides you with dozens of debugging tools to improve every aspect of web design & development.
From responsive design, testing, to social media previews & actionable accessibility tips, Polypane has got you covered.
Gone are the days where you tried to resize your Chrome browser to check your websites’ compatibility for several browsers, devices & resolutions.
What’s worse is, running those compatibility tests one at a time. *No one has got time to do that!*
With Polypane, you can test not only that but also the clicks, scrolls typing & hover-over, all at once from a single window. Plus, you can emulate popular devices with a single click.
You can make edits to your designs real-time, and watch how they fit in across hundreds of devices & browsers in real-time.
Love Dark Mode? Polypane has got you covered.
You can design/develop the websites in light & dark mode side by side. (That’s dope, Charlie!!)
Speaking of designing, you can run CSS checks to identify any code breaks & also fix it with the custom, built in debugging tools for every, single pane.
With the Polypane’s built-in browser, you always can access the documentation quickly on the side without having the leave the project.
(We hate switching tabs in the middle of the work, as much as you do)
Preview how your websites are going to appear when shared on social media. Polypane will also tell you which values are missing and how to fix the errors it finds.
Visualize the entire structure of your webpages, and Polypane will alert you the broken links automatically.
Wait, there’s a lot more to cover.
For now, let’s take a quick look at the built-in accessibility checker.
From color blindness, contrast testing to visual impairments & reachability, there are over 80 different A11y tests you will need to check for Accessibility.
Polypane checks all of that for you, providing you actionable feedback to act upon.
Get a lifetime deal to Polypane now!
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Is this Polypane lifetime deal still available?
No. The lifetime deal for Polypane sold through SaasMantra has expired. Polypane is still actively developed and sold, but only as a subscription: Individual at $9/month (or ~$81/year) and Business at $54/month for up to 10 users.
What is Polypane?
Polypane is a standalone Chromium-based browser built specifically for web developers and designers. It shows your site in multiple synced viewport panes simultaneously — every scroll, click, and code change is reflected across all panes at once.
What are Polypane's main features?
Key features include: multiple synchronized viewports from mobile to 5K, built-in accessibility auditing (WCAG compliance, color contrast checks, focus order), live reload, dark/light mode side-by-side testing, social media preview cards, SEO meta info panel, CSS debugging tools, and over 80 accessibility tests.
What platforms does Polypane run on?
Polypane runs on Windows, macOS, and Linux. A single license covers up to 3 devices per user.
Is Polypane still actively maintained?
Yes. Polypane is actively developed — version 29 was released in May 2026. It is 100% bootstrapped by its founder Kilian Valkhof in The Netherlands.
Who is Polypane designed for?
Polypane targets professional web developers, UI/UX designers, and QA engineers who regularly test responsive layouts and need accessibility and performance tooling built into their browser.
Does Polypane offer a free trial?
Yes. Polypane offers a 14-day free trial with full access and no credit card required at polypane.app.
Does Polypane have an affiliate or referral program?
Yes. Polypane has a referral agreement (available at polypane.app/referralagreement.pdf), though specific commission rates are disclosed only to program partners.
Often compared with
These are other tools in the same space, not deals on GrabLTD.
- Chrome DevTools (built-in)
- Responsively App
- Sizzy
- Blisk
- Firefox Developer Edition
