head to head · open source
quasar vs UserAgent-Switcher
quasar has 27,207 GitHub stars, 3,668 forks, 74 open issues and last shipped 17 days ago. UserAgent-Switcher has 1,540 stars, 200 forks, 150 open issues and last shipped 5 days ago. quasar leads on adoption by 1,667% (27,207 vs 1,540 stars). quasar is written in JavaScript under MIT; UserAgent-Switcher is written in JavaScript under MPL-2.0. quasar has attracted 13% as many forks as stars, UserAgent-Switcher 13%. UserAgent-Switcher was the more recently maintained of the two, and both are self-hostable with no licence fee. The two share 2 topic tags (browser-extension, javascript), so they are genuine substitutes rather than adjacent tools.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| quasar | UserAgent-Switcher | |
|---|---|---|
| GitHub stars | ★ 27K | ★ 1.5K |
| License | MIT | MPL-2.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-10-19 | 2026-10-31 |
| Forks | ⑂ 3.7K | ⑂ 200 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick quasar if
- You weight community size — 27K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick UserAgent-Switcher if
- You want the UserAgent-Switcher feature set and don't need the biggest community
- You prefer the MPL-2.0 license terms
- Your stack matches JavaScript
- You evaluated both and UserAgent-Switcher fits your workflow better
About quasar
Quasar Framework Build high performance Vue.js user interfaces in record time: responsive Single Page Apps, SSR Apps, SSG Apps, PWAs, browser extensions, hybrid mobile apps and Electron apps. If you want, all using the same codebase! Please submit a PR to with your website/app/Quasar tutorial/video etc. Thank you! Supporting Quasar Quasar Framework is an MIT licensed open source project. Its ongoing development is made possible thanks to the support by our awesome sponsors and backers. Please consider supporting our efforts, too! If you use Quasar at work, drop a message to your management about sponsoring us at…
read the full quasar overview →
About UserAgent-Switcher
UserAgent Switcher A highly configurable browser extension for spoofing your User Agent string. UserAgent Switcher modifies both the User Agent in your browser's request headers and relevant JavaScript navigator properties (e.g., navigator.userAgent , navigator.appVersion , navigator.platform ). It also supports modern browser identification mechanisms such as Client Hints headers and the navigator.userAgentData object, ensuring consistent and comprehensive spoofing across all detection methods. Key Features Comprehensive Spoofing: Modifies both HTTP request headers and JavaScript navigator objects. Granular…
read the full UserAgent-Switcher overview →
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Frequently asked questions
Is quasar or UserAgent-Switcher more popular?
quasar has 27,207 GitHub stars and UserAgent-Switcher has 1,540. quasar has the larger community by that measure.
Are quasar and UserAgent-Switcher free?
Both are open source. quasar is licensed under MIT and UserAgent-Switcher under MPL-2.0. Neither carries a licence fee.
What is the difference between quasar and UserAgent-Switcher?
quasar is written in JavaScript and UserAgent-Switcher in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, quasar or UserAgent-Switcher?
Choose quasar if you want the larger community (27,207 stars) or its MIT licence terms. Choose UserAgent-Switcher if its feature set, stack or MPL-2.0 licence fits better. Both are self-hostable.