1. Wappalyzer
Identifies the technology stack behind any website.
Why it replaces Open Developer Tools: Covers similar ground in the Developer Tools category: Identifies the technology stack behind any website.
Best Open Developer Tools Alternatives in 2026
Open Developer Tools is a strong option, but it is not the right fit for everyone. Below are 10 alternatives compared on rating, install base, pricing and the use case each one actually wins on.
About Open Developer Tools
Supercharge your development workflow with the ultimate developer productivity extension!
Free
Full reviewComparison at a glance
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| Open Developer Tools (original) | — | — | Free | Supercharge your development workflow with the ultimate developer productivity extension! |
| Wappalyzer | 4.6 | 3M+ | Freemium | Developers, agencies and sales teams researching what a site is built with. |
| JSON Formatter | 4.3 | 2M+ | Free | Anyone poking at REST APIs directly in the browser. |
| Web Developer | 4.5 | 1M+ | Free | Web developers who want quick access to common debugging tools without opening DevTools. |
| Designer Tools | 4.6 | 100K+ | Freemium | A collection of tools to help you design and develop websites with precision. |
| SN Utils - Tools for ServiceNow | 4.9 | 100K+ | Freemium | Productivity tools for ServiceNow, offered by SN Utils B.V. Not affiliated with ServiceNow, Inc. |
| Viewport Resizer: Ultimate Device Emulator & Website Testing Tool | 4.2 | 70K+ | Free | Emulate devices, resize screens, and perfect your web design effortlessly with this cutting-edge testing and presentation tool. |
| React Developer Tools | 3.9 | 5M+ | Free | React developers debugging component state and render performance. |
| Tag Assistant | 3.9 | 3M+ | Free | The Tag Assistant extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager. |
| Take Webpage Screenshots Entirely - FireShot | 4.8 | 3M+ | Free | Anyone who needs fast, reliable full-page screenshots for work, support or documentation. |
| Meta Ads Data Advisor | 3.9 | 3M+ | Free | Meta Ads Data Advisor automates connecting your website and marketing data to Meta for better ad performance. No developers needed. |
Open Developer Tools alternatives in detail
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2. JSON Formatter
Makes raw JSON responses readable in the browser.
Why it replaces Open Developer Tools: Covers similar ground in the Developer Tools category: Makes raw JSON responses readable in the browser.
3. Web Developer
Adds a toolbar button with various web developer tools.
Why it replaces Open Developer Tools: Covers similar ground in the Developer Tools category: Adds a toolbar button with various web developer tools.
4. Designer Tools
A collection of tools to help you design and develop websites with precision.
Why it replaces Open Developer Tools: Covers similar ground in the Developer Tools category: A collection of tools to help you design and develop websites with precision.
5. SN Utils - Tools for ServiceNow
Productivity tools for ServiceNow, offered by SN Utils B.V. Not affiliated with ServiceNow, Inc.
Why it replaces Open Developer Tools: Covers similar ground in the Developer Tools category: Productivity tools for ServiceNow, offered by SN Utils B.V. Not affiliated with ServiceNow, Inc.
6. Viewport Resizer: Ultimate Device Emulator & Website Testing Tool
Emulate devices, resize screens, and perfect your web design effortlessly with this cutting-edge testing and presentation tool.
Why it replaces Open Developer Tools: Covers similar ground in the Developer Tools category: Emulate devices, resize screens, and perfect your web design effortlessly with this cutting-edge testing and presentation tool.
7. React Developer Tools
Inspect React component trees, props and state.
Why it replaces Open Developer Tools: Another popular Developer Tools extension: Inspect React component trees, props and state.
8. Tag Assistant
The Tag Assistant extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager.
Why it replaces Open Developer Tools: Another popular Developer Tools extension: The Tag Assistant extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager.
9. Take Webpage Screenshots Entirely - FireShot
Take FULL webpage screenshots. Capture, edit and save them to PDF/JPEG/GIF/PNG, upload, print, send to OneNote, clipboard or email.
Why it replaces Open Developer Tools: Another popular Developer Tools extension: Take FULL webpage screenshots. Capture, edit and save them to PDF/JPEG/GIF/PNG, upload, print, send to OneNote, clipboard or email.
10. Meta Ads Data Advisor
Meta Ads Data Advisor automates connecting your website and marketing data to Meta for better ad performance. No developers needed.
Why it replaces Open Developer Tools: Another popular Developer Tools extension: Meta Ads Data Advisor automates connecting your website and marketing data to Meta for better ad performance. No developers needed.
Compare Open Developer Tools head-to-head
Direct comparisons with the extensions people weigh against it.
Wappalyzer vs JSON FormatterStack detection for recon work against readable API responses in the browser.React Developer Tools vs WappalyzerBoth are developer tools extensions people shortlist together — see how ratings, install base, pricing and day-to-day use differ.React Developer Tools vs JSON FormatterBoth are developer tools extensions people shortlist together — see how ratings, install base, pricing and day-to-day use differ.All comparisonsThe full compare hub, grouped by category.
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Frequently asked questions
What is the best alternative to Open Developer Tools?
Wappalyzer is the closest match. Covers similar ground in the Developer Tools category: Identifies the technology stack behind any website.
Is there a free alternative to Open Developer Tools?
Yes — JSON Formatter, Web Developer, Viewport Resizer: Ultimate Device Emulator & Website Testing Tool are free.