# Responsive Viewer alternatives

> Responsive Viewer alternatives, checked October 2026: Sitepeel, Responsively App, Window Resizer, Polypane and DevTools. Free and paid ways to test screens.

Canonical page: https://sitepeel.dev/compare/responsive-viewer-alternatives/

Responsive Viewer shows many screen sizes in Chrome, free with ads. These do the same job, with no ads, more devices or no install.

Published: 2026-10-27

Facts and prices checked: 2026-10-27

Tool used in this guide: [Responsive viewer](https://sitepeel.dev/free-tools/responsive-checker/index.md)

Free website tool for this task: [Responsive checker](https://sitepeel.dev/free-tools/responsive-checker/index.md) (https://sitepeel.dev/free-tools/responsive-checker/)

## In short

- Inside Chrome, no ads: Sitepeel’s Responsive viewer
- Free desktop app: Responsively App
- Real window sizes: Window Resizer

## The short list

Responsive Viewer is free with ads and fewer screens; Pro is $4.99 a month. Its store listing doesn’t name its maker, and it runs in Chrome only.

Responsive Viewer alternatives compared

| Tool | Best for | Price | Works in |
| --- | --- | --- | --- |
| Sitepeel | Devices in Chrome, or from a link | Free web tools; extension paid once | Chrome extension and web |
| Responsively App | Free desktop app | Free, open source | Mac, Windows, Linux |
| Window Resizer | Exact window sizes | Free | Chrome |
| Polypane | Professional testing | $12 a month or $108 a year | Mac, Windows, Linux |
| Chrome DevTools | Free, built in | Free, built in | Chrome |

Good to know: Checked on October 27, 2026 on each product’s own site and store page. “No” means we couldn’t find it there. We make Sitepeel.

## 1. Sitepeel

The Chrome extension’s Responsive viewer shows 60+ phones, tablets, foldables and desktops with synced scrolling, rotation and screenshots. The free responsive checker does it from a link and lists layout problems.

![Sitepeel responsive checker: linear.app on a monitor, laptop, tablet and phones, with layout problems listed](https://sitepeel.dev/images/compare/sitepeel-responsive.webp)

Sitepeel’s free responsive checker on linear.app.

## 2. Responsively App

A free, open source desktop browser with mirrored clicks and scrolling across devices.

![Responsively App’s website](https://sitepeel.dev/images/compare/responsively-home.webp)

Responsively App’s website on October 27, 2026.

## 3. Window Resizer

Window Resizer resizes the real browser window to preset sizes, one at a time. It’s free, with 800,000 users, but hasn’t been updated since July 2024.

![Window Resizer on the Chrome Web Store, 800,000 users](https://sitepeel.dev/images/compare/window-resizer-store.webp)

Window Resizer on the Chrome Web Store on October 27, 2026.

## 4. Polypane

A paid developer browser with synced viewports and deep accessibility and emulation tests.

## 5. Chrome DevTools

The device toolbar (Ctrl+Shift+M) shows one device size at a time, with touch and network throttling.

## Which one should you pick?

**Verdict:** For many devices inside Chrome without ads, Sitepeel. For free on the desktop, Responsively App. For one exact window size, Window Resizer or DevTools.

## Questions and answers

### Is Responsive Viewer free?

Yes, with ads and a limited set of screens. Professional is $4.99 a month, or $3.99 on the yearly option.

### Who makes Responsive Viewer?

Its store listing and privacy policy don’t name a person or company. The listing links a GitHub project by the original author.

### Can I test screen sizes without an extension?

Yes. Sitepeel’s free responsive checker works from a link, and Chrome DevTools has a device toolbar built in.

## Further reading

- [Responsive Viewer](https://responsiveviewer.org/)
- [Responsive Viewer on the Chrome Web Store](https://chromewebstore.google.com/detail/responsive-viewer/inmopeiepgfljkpkidclfgbgbmfcennb)
- [Window Resizer on the Chrome Web Store](https://chromewebstore.google.com/detail/window-resizer/kkelicaakdanhinjdeammmilcgefonfh)
- [Responsively App](https://responsively.app/)

## Related pages

- [Polypane alternatives](https://sitepeel.dev/compare/polypane-alternatives/index.md): Polypane alternatives, checked October 2026: Responsively App, Sizzy, Blisk, Responsive Viewer and Sitepeel’s free responsive checker, with prices and limits.
- [Check a site on every screen size](https://sitepeel.dev/guides/check-website-on-every-screen-size/index.md): See a website on phones, tablets, laptops and monitors side by side, free. Find overflow, tiny text and small tap targets, then test real devices.
- [Test responsive layouts](https://sitepeel.dev/guides/test-responsive-website-layouts/index.md): Test a responsive website at phone, tablet and desktop widths. Find where the layout breaks, check hard content, record the bug and verify on devices.