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Polypane. Browser for web devs @polypane.app · 2h

If you're an accessibility auditor or implementer, Polypane 31 has a massive time-saving feature for you! With per-pane zoom settings, you can now check 100% page zoom right alongside 200% and 400% zooms, letting you check WCAG 1.4.4 and 1.4.10 in one fell swoop, with easy comparison back to 100%.

A website in three panes in Polypane at three different zoom levels: 100%, 200% and 400%

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Polypane. Browser for web devs @polypane.app · 25/09/2026

Go to definition for CSS custom properties is pretty nice. Finding your way back with a single click, that's even nicer.

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Polypane. Browser for web devs @polypane.app · 04/09/2026

Pssst 🤫 We're working on an infinite canvas. What do you think?

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Polypane. Browser for web devs @polypane.app · 28/08/2026

Updated placeholdifier overlay We switched out the blocking of text for replacing it with scribbles, to make it even easier to focus on the design above the content. This, and dozens of other improvements and fixes are now available in Polypane 30.1!

A webpage where all the text is replaces with scribbles.

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Polypane. Browser for web devs @polypane.app · 28/08/2026

Passkey support on Linux! Polypane now supports passkeys across all three operating systems.

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Polypane. Browser for web devs @polypane.app · 28/08/2026

Our source panel can now toggle between the rendered and the server-sent HTML! Both are automatically formatted, both are validated. If you're not sure if an HTML issue starts on the server or in your JS, that's now super easy to find.

The Polypane Source panel with a new "rendered"/"server" toggle. The validation says"Congratulations, this server HTML is valid!"

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Polypane. Browser for web devs @polypane.app · 28/08/2026

Our elements panel got an exciting addition. Hover over the specificity of a selector to see each part of it highlighted, so you know exactly what's responsible. Intelligent enough to drill down into nested `:is()` selectors, intelligent enough to drill up into nested selectors.

A complex selector with a highlighted specificity. Several part of the text are underlined and highlighted with different styles.

A neste selector with a highlighted specificity. Several part of the text are underlined and highlighted with different styles.

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Polypane. Browser for web devs @polypane.app · 26/08/2026

We've given our online CSS selector specificity calculator some nice upgrades! - Improved resolution of function nested specificity - Highlighting parts while you type (using OpagueRange + Highlight API) - Explore your selector by hovering over each part Check it out: polypane.app/css-specific...

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Polypane. Browser for web devs @polypane.app · 20/08/2026

Check out our newest testimonial by @pointc.bsky.social 🤩 See all our latest testimonials here: polypane.app/testimonials/

Shout-out to Polypane. I've been working on a website with a fairly complex layout and I can't image [sic] developing anything without it.

Too many features to list. Just try it. You'll love it.

Craig Roblewsky
Cofounder Sleepy Dog Media Group

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Polypane. Browser for web devs @polypane.app · 21/07/2026

Our helper extension got a new update, adding even more options to help move your workflow over to Polypane. Configure any domain to get a button, full page overlay or let it automatically forward pages to Polypane. Available for all the browsers. Links here: polypane.app/docs/helper-...

"Overlay behavior. The helper adds a button to local URLs. You can configure additional rules for specific domains."

What follows is three images showing the button, overlay and auto-open styles along with instructions.

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Polypane. Browser for web devs @polypane.app · 20/07/2026

Polypane's snippets store has dozens of snippets that add new functionality to Polypane that you can install with a single click. Browse the collection here polypane.app/snippets/

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Polypane. Browser for web devs @polypane.app · 08/07/2026

Guess which browser went 29 major versions without having a directory listing feature... Well, not anymore, the upcoming version of Polypane now has a beautiful directory listing! It's fast, responsive, easy to navigate, and part of an exciting new feature we're keeping under wraps for now.

Polypane showing a directory listing page across three panes

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Polypane. Browser for web devs @polypane.app · 24/06/2026

Just wanna see the demos? Check out this demo reel!

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Polypane. Browser for web devs @polypane.app · 18/06/2026

We have a huge backlog of ideas and user requests going back all the way to our initial beta in 2017 and some even earlier. They stick around until the timing is right, like adding text selection sync, a backlog item we added on April 12th, 2019 (predating Polypane 1.0!) and that's shipping soon.

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Polypane. Browser for web devs @polypane.app · 12/06/2026

We’re still at @cssday.nl! If you haven’t swing by out booth yet, we have these cool cheat sheets on Flex Grid, Anchor positioning and invoker commands. Come grab some!

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Polypane. Browser for web devs @polypane.app · 11/06/2026

Are you excited by @joshtumath.uk's #CSSDay talk on text-scale and want to start using and testing adjustable text sizes? We already let you emulate different font sizes today, and our upcoming release brings support for emulating and inspecting text-scale! Come to our booth for a live demo!

Meta data overview of the CSS website with a "text-scale" entry.

Polypane's emulation settings, with "OS text-scale" visible at the bottom along with 'default font size'.

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Polypane. Browser for web devs @polypane.app · 11/06/2026

We’re at @cssday.nl today and tomorrow! Come check out Polypane, chat with @kilianvalkhof.com, grab some stickers and pins, an extra long CSS Day trial or even one of our new (and exclusive for CSS Day!) cheat sheets on flex, grid, anchors and invokers!

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Polypane. Browser for web devs @polypane.app · 29/05/2026

If the button is in the way, you can quickly collapse it, so it's still there when you need it, just not as visible. If the top right corner doesn't work for you, you can place it in any of the other corners too by right-clicking the extension icon. You can fully hide it from the context menu too.

Top right corner of a browser. A half circle with an arrow pointing out is visible on the side

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Polypane. Browser for web devs @polypane.app · 29/05/2026

We updated our browser extension that lets you quickly open URLs and links in Polypane! A big theme in our recent survey was finding ways to lower the friction of opening Polypane. Now the extension shows an on-page button for all local pages, making it super easy. polypane.app/docs/helper-...

A browser with a Polypane button in the top right

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Polypane. Browser for web devs @polypane.app · 14/05/2026

Here's something that _could_ have saved us a lot of time, had we thought of it earlier. 😅 If the page has no valid doctype and is running in quirks mode (which comes with weird rendering and JS handling) Polypane is going to show this badge where normally we show the doctype!

Polypane elements panel with a red "quirks mode" badge in place of a doctype.

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Polypane. Browser for web devs @polypane.app · 21/04/2026

It took well over a month to jump all the hoops and get everything aligned to support passkeys on macOS, but the next release integrates directly with your keychain! 🔐 Passkey support through 1password on linux and Windows Security on Windows is already supported in the released version.

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Polypane. Browser for web devs @polypane.app · 13/04/2026

Polypane has pixel perfect social media previews for ten different social media platforms. That's already much more than any other tool out there. But Polypane is the kind of app that goes to 11. 🧑‍🎤 So we're adding WhatsApp in the next release. polypane.app/social-media...

Social media preview of Polypane.app as shared on Whatsapp

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Polypane. Browser for web devs @polypane.app · 01/04/2026

The specification smells a little funny, but we've already implemented emulation for it.

Polypane showing the quick start page and a popover listing a number of css media features. The top one says "prefers-reduced-pungency" and the value "remove" is selected.

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Polypane. Browser for web devs @polypane.app · 18/03/2026

Polypane's elements panel shows editable pseudo styles as well as @starting-style for any element. This is already extremely useful, and it's unique among browser devtools. In the next release, you can toggle their state right from the styles💡 Excellent idea by @yatil.social, can't wait to ship!

Part of the Polypane Elements UI. The style tab is selected listing ":hover" and ":focus" lines with switches. The hover switch is turned on.

Part of the Polypane Elements panel. There is a CSS style wrapped in @starting-style, and a turned-on switch is visible next to it.

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Polypane. Browser for web devs @polypane.app · 11/03/2026

One thing that a lot of you have reported feels missing in Polypane peek (our awesome hold-alt/option-to-inspect tool polypane.app/docs/polypan... ) are grid and flexbox layout visualisations. Building it is ...complex, but luckily our own site has plenty of stress tests like the one below!

a complex flex-wrapped layout with dozens of items. The entire element is highlighted with all the spacing between elements rendered with a flex-gap visualisation.

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Polypane. Browser for web devs @polypane.app · 10/03/2026

We just got recognised as the most innovative web developer browser in the Business Excellence Awards by Acquisition International magazine! 😎

AI Business Excellence Awards

Most Innovative Web Developer Browser

Polypane

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Polypane. Browser for web devs @polypane.app · 21/02/2026

Accessibility researcher (and Polypane user) @200ok.nl was on national TV just now to talk about the (lack of) accessibility of online chatbot and …what’s that on his laptop? 👀

A man and a woman viewing two laptops. We see the covers of the laptops and one of them is covered in stickers by Polypane, Fronteers, NL Design System and more.

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Polypane. Browser for web devs @polypane.app · 11/02/2026

Did you know you can right-click any element with an ID to get a link to the document fragment? And just as easily have it formatted as markdown? One of the many things that takes dozens of steps in other browsers that takes two clicks in Polypane.

a context menu on a header, showing a list of options like "inspect element" and "reload this pane". The cursor is on a highlighted item named "Copy link to document fragment".

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Polypane. Browser for web devs @polypane.app · 29/01/2026

Did you know we wrote a deep dive on offset parents and stacking context? Two essential concepts when it comes to positioning in all three dimensions. They're hard to debug, but not with Polypane! Contexts are just listed in our elements panel, easy peasy. Read here: polypane.app/blog/offset-...

The Polypane elements panel showing a 'debug' tab with multiple CSS properties and contexts. There is a bright pink arrow overlaid pointing to the 'stacking context parent', showing a DOM element.

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Polypane. Browser for web devs @polypane.app · 28/01/2026

New year, new badges! Like previous years, in 2026 Polypane is also a Software Advice Frontrunner and Shortlisted on Capterra due to the outstanding user reviews (By you! Thank you!!)

Capterra shortlist 2026, Software Advice Frontrunners 2026, Polypane

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Polypane. Browser for web devs @polypane.app · 14/01/2026

Someone notified us that our security.txt file was expired, so in the next update Polypane will check the date and give you a warning if it's in the past. ✅

Security.txt Expired: The Expires date in this Security.txt is in the past

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Polypane. Browser for web devs @polypane.app · 09/01/2026

Control all browsers on any device from inside Polypane. Synchronised interactions, Inspect and Edit styles, get console output. All without a single line of configuration.

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Polypane. Browser for web devs @polypane.app · 17/12/2025

1. Open your Portal on any other device or browser 2. Add a snippet 3. Activate it Snippets now run in any device you have connected to Polypane portal.

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Polypane. Browser for web devs @polypane.app · 05/12/2025

Coming soon: navigate the elements panel tree using your arrow keys. The custom-built Polypane elements panel lets you inspect and edit Elements across all viewports in one go.

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Polypane. Browser for web devs @polypane.app · 27/10/2025

Here's a cool photo that Polypane user Marcos sent us recently. He has a Logitech Creative Console all decked out to quickly switch workspaces, layouts and to reload or open the command bar for more advances tasks. Such a nice productivity boost! Should we make available a set of icons to use?

A screen showing Polypane, slightly out of focus. In front of it, a hand hold a small rectangular device with nine buttons in, all showing the Polypane icon together with various title like "workspace 1", "horizontal layout" and "reload".

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Polypane. Browser for web devs @polypane.app · 15/10/2025

Looking for our logo, icon or other brand assets? Right-click the logo on the site to find our brand kit!

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Polypane. Browser for web devs @polypane.app · 08/10/2025

Kilian is at Frontmania today to speak about the INTL API! Make sure to grab the magazine for a cool article about Polypane and ask Kilian for some stickers!

A magazine folded open showing an article with the title ‘a browser just for developers’

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Polypane. Browser for web devs @polypane.app · 01/10/2025

New in Polypane 26: all our devices emulate the correct `safe-area-inset-*` CSS environment variables, as well as the correct small viewport height. Toggle the visualization from the emulation settings to see where they're located. Like browser UI the svh overlay scrolls away when you scroll down.

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Polypane. Browser for web devs @polypane.app · 21/07/2025

We're proud to add two new awards to our ever-growing list. This time we're recognised as Category leaders by GetApp and we're on the Capterra shortlist, both for (web) app development 🙌 See all our awards at polypane.app/accolades/

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Polypane. Browser for web devs @polypane.app · 09/07/2025

Here's a fun thing we snuck into the latest patch release: support for HTML comments in the elements panel! Check out this lovely ASCII art on @sjoy.lol's website :)

Polypane showing two mobile panes showing sarajoy.dev. The elements panel is visible, and an HTML comment showing an ASCII representation of Sara is visible.

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Polypane. Browser for web devs @polypane.app · 02/07/2025

Not every feature needs to be large to be useful. Our target size tooling detects interactive elements that don't follow WCAG, Google Mobile Friendliness or Apple HIG guidelines. But sometimes that element might be behind our UI. So in Polypane 25 we added a quick toggle to move it out of the way!

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Polypane. Browser for web devs @polypane.app · 14/06/2025

Our updated icon will feel right at home with Liquid Glass in light, dark and mono.

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Polypane. Browser for web devs @polypane.app · 14/05/2025

We like sweating the details. Did you know for example that the Polypane Elements panel suggests CSS properties not alphabetically, but based on most common usage? So when you type "c" you get "color", not "caption-side" and when you type "f" you get "font-size", not "fill".

Polypane elements panel autocompleting "C" to "Color"

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Polypane. Browser for web devs @polypane.app · 13/05/2025

Our rulers are getting a new measuring overlay. Drag and measure an overlaid rectangle that show its dimensions and the distance to edges. Snaps to your guides while dragging. Or use it as a selection to screenshot a specific area of the page. Try it in our upcoming release!

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Polypane. Browser for web devs @polypane.app · 28/04/2025

We have Widevine DRM support in Polypane! Here's a screenshot of @netflix.com running in Polypane to prove it 😏 Yes, it's a black rectangle. The DRM works! But trust me, I could see and hear Jamie Oliver. You can too, in the next full release.

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Polypane. Browser for web devs @polypane.app · 23/04/2025

Wanna hide some social media previews, or maybe just change the way they're sorted so the one you care about most is on top? We got you.

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Polypane. Browser for web devs @polypane.app · 23/04/2025

Edit HTML directly from the elements panel, and Polypane will update your HTML in-place to maintain any event listeners you have attached to the DOM you just edited!

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Polypane. Browser for web devs @polypane.app · 23/04/2025

Need to debug a difficult z-indexing or stacking context issue? Turn on the 3D view to quickly see what's going on ...or to take a peek behind the curtain!

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Polypane. Browser for web devs @polypane.app · 23/04/2025

And then when you're done, you can quickly trim, cut and annotate your video before exporting and sharing it.

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