Description from extension meta
Browser DevTools extension for debugging Svelte applications.
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Description from store
Check out the changelog at https://github.com/sveltejs/svelte-devtools/releases
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Svelte DevTools is a browser DevTools extension for the open-source Svelte JavaScript framework. It allows you to gain deep insights and inspect the Svelte component hierarchies in the Developer Tools panel itself. After installing, you will get a new tab in your browser DevTools titled "Svelte". The DevTools panel will only work on sites with `dev` mode enabled, which should work out-of-the-box when you're running your Svelte app locally.
Key Features:
- Zero-configuration: Run your application in development mode and have everything working
- Real-time Component Tree: Svelte component hierarchy visualization in real-time, deeper understanding of your application structure and identify relationships between components easily
- Interactive State Inspection: Modify and experiment with component states effortlessly in one place, and easily see events and other state
- Dark Mode Support: Enjoy the sleek and user-friendly interface in both light and dark modes
- Open Source and Community-Driven: This extension is open source and actively maintained by the Svelte community
This extension requires permissions to access the tab's content, data will be processed locally in your browser and cleared after each session.
Latest reviews
- (2025-07-18) Anthony Holland: Abandonware. Not updated since before the release of Svelte 5 and doesn't work with Svelte 5.
- (2025-04-22) Kyle Mueller: uses `crypto.randomUUID`, which straps the tool to HTTPS connections. Great dev choice guys! (/s) If you needed a unique ID, why not use Symbol? Kind of worthless for dev work.
- (2025-02-05) Lukas: Good tool but doesn't work with latest release (Svelte 5).
- (2025-01-21) Emiel van der Hooft: Lack of proper dev tools makes it hard to take Svelte serious. Does not work with 5 and what works with 4 is lacklustre compared to vue devtools for example.
- (2025-01-13) Neil Young: Doesn't work with Svelte 5
- (2025-01-07) Alek Melnyk: does not work at all, sveltekit, mac and brave browser
- (2024-06-23) Phil Cleaver: Sorry for 1 star, but for me this doesn't work on my Chromebook. Did fresh npn create svelte@latest, npm i. restart etc, App runs great but I get Svelte DevTools No Svelte app detected reload Not working? Did you... Build with dev mode enabled? Use Svelte version ^4.0.0? chrome os Version 125.0.6422.197 (Official Build) (64-bit) lenovo chromebook
- (2024-03-10) joy mia: Best of the best
- (2023-12-17) Dewmal Handapangoda: Not working with kit.svelte.dev
- (2023-11-16) Ondřej Čížek: Very cool, keep it up!
- (2023-11-15) John: great tool. helped me debug some object arrays burried in my locals very quickly.
- (2023-11-13) Laurent Gaulhiac: Awesome initiative.
- (2023-11-11) Andreas Söderlund: Powerful! Incredible to have the Svelte code directly in the DevTools, with editable props and so much more.
- (2023-11-04) Rubi: I love when I can debug my svelte web app using Svelte DevTools
- (2023-11-04) Rubi: I love when I can debug my svelte web app using Svelte DevTools