1. Wappalyzer
Identifies the technology stack behind any website.
Why it replaces GTools: Developer Swiss Army Knife: Covers similar ground in the Developer Tools category: Identifies the technology stack behind any website.
Best GTools: Developer Swiss Army Knife Alternatives in 2026
GTools: Developer Swiss Army Knife 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 GTools: Developer Swiss Army Knife
20 developer tools in your toolbar. JSON, JWT, Regex, Diff, QR, and more. 100% local, zero network requests.
Free
Full reviewComparison at a glance
| Extension | Rating | Users | Pricing | Best for |
|---|---|---|---|---|
| GTools: Developer Swiss Army Knife (original) | — | — | Free | 20 developer tools in your toolbar. JSON, JWT, Regex, Diff, QR, and more. 100% local, zero network requests. |
| 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. |
| 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. |
| Cookie-Editor | 4.4 | 2M+ | Free | Simple yet powerful Cookie Editor that allow you to quickly create, edit and delete cookies without leaving your tab. |
GTools: Developer Swiss Army Knife alternatives in detail
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2. JSON Formatter
Makes raw JSON responses readable in the browser.
Why it replaces GTools: Developer Swiss Army Knife: 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 GTools: Developer Swiss Army Knife: 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 GTools: Developer Swiss Army Knife: 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 GTools: Developer Swiss Army Knife: Covers similar ground in the Developer Tools category: Productivity tools for ServiceNow, offered by SN Utils B.V. Not affiliated with ServiceNow, Inc.
6. React Developer Tools
Inspect React component trees, props and state.
Why it replaces GTools: Developer Swiss Army Knife: Another popular Developer Tools extension: Inspect React component trees, props and state.
7. Tag Assistant
The Tag Assistant extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager.
Why it replaces GTools: Developer Swiss Army Knife: Another popular Developer Tools extension: The Tag Assistant extension works with Tag Assistant to help troubleshoot installation of gtag.js and Google Tag Manager.
8. 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 GTools: Developer Swiss Army Knife: 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.
9. 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 GTools: Developer Swiss Army Knife: 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.
10. Cookie-Editor
Simple yet powerful Cookie Editor that allow you to quickly create, edit and delete cookies without leaving your tab.
Why it replaces GTools: Developer Swiss Army Knife: Another popular Developer Tools extension: Simple yet powerful Cookie Editor that allow you to quickly create, edit and delete cookies without leaving your tab.
Compare GTools: Developer Swiss Army Knife 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 GTools: Developer Swiss Army Knife?
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 GTools: Developer Swiss Army Knife?
Yes — JSON Formatter, Web Developer, React Developer Tools are free.