Svelte Debugger for Error Handling and Performance Monitoring

Streamline your Svelte development with our online debugger. Efficiently track and resolve issues, optimizing your app's performance and user experience.

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Zipy Svelte Debugger for Error Handling and Performance Monitoring - JavaScript

Get started in a minute

Add the following to the <head> tag of your website, before other code:
<script src="" crossorigin="anonymous"></script><script> window.zipy && window.zipy.init('YOUR_PROJECT_SDK_KEY');</script>
Read our comprehensive SDK documentation for the latest guidelines on installing Zipy. Get up and running swiftly with streamlined setup processes.
1. Install the ‘zipy’ module via NPM:
npm i --save zipy
2. Import ‘zipy’ and call ‘zipy.init’ as following:
import zipy from ‘zipy’;
Read our SDK documentation to ensure you have the latest instructions for installing Zipy. Get started in minutes.
Zipy error monitoring - svelte


The best Svelte debugger for error monitoring

The best Svelte debugger for error monitoring. Unleash your inner detective to monitor and address frontend, network, and API issues. Ensure a top-notch user experience.

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Svelte debugger online with stack trace

Svelte debugger with integrated stack trace capabilities. Quickly get to the root of Svelte errors with stack trace, console logs, and detailed network request responses.

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Zipy stack trace - svelte
Zipy api performance - svelte


Supercharge your Svelte app performance

Optimize your Svelte app's performance. Keep ahead in tracking your Svelte app's performance with our state-of-the-art performance monitoring and diagnostics. Identify and resolve API latency issues, boosting speed for a better user experience.

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“As a unified platform for user session replay, frontend & network monitoring, Zipy offers an efficient solution for all my debugging needs. It is an indispensable tool for any developer.

Patryk Pijanowski, Co-Founder

Codejet  - Zipy's Happy Customer
Patryk Pijanowski - Zipy's Happy Customer

"Also, we had a call with a customer yesterday end user's message was "it's broken". In Zipy, found the session, found the error, fixed the error. Five minutes total time from reporting to resolution. Zipy is amazing."

Eddy Martinez, CEO

Read this twice  - Zipy's Happy Customer
Vahe Hovhannisyan  - Zipy's Happy Customer

Zipy has changed my life in ways I can’t tell you! Between 2 projects, I have found bugs that would have taken developers years of debugging.

Timothy Connolly, Co-founder & CTO

Directnorth  - Zipy's Happy Customer
Timothy Connolly  - Zipy's Happy Customer

“We look at user sessions on Zipy on a daily basis. We understand what's going wrong in terms of technical issues and you fix those practically before the customer even reports it to you.”

Anjali Arya, Product & Analytics

SuprSend  - Zipy's Happy Customer
Read Case Study

“You realize how good a product is when you have been using it for a while and then discover that this use case is not even what the creators had in mind, but your tool has much more.”

Tomás Charles, Co-founder & CEO

Tomás Charles  - Zipy's Happy Customer

“We integrated Zipy early on and it's now part of our daily scrums - my team has a constant eye on Production bugs. Zipy improves our Productivity significantly.”

Manish Mishra, Co-founder & CTO

Pazcare  - Zipy's Happy Customer
Manish Mishra  - Zipy's Happy Customer

“Zipy is clearly providing a very differentiated solution. Observability is going to be the key to understanding customer issues proactively and it impacts business outcomes directly.”

Jyoti Bansal, Co-founder

Appdynamics  - Zipy's Happy Customer
Jyoti Bansal  - Zipy's Happy Customer

“5 Stars. In no time, Zipy has become our go-to place for watching user journeys, and fix the most important bugs or workflows that our users are experiencing.”

Sandeep Rangdal, Senior Staff Engineer

mindtickle  - Zipy's Happy Customer
Sandeep Rangdal  - Zipy's Happy Customer

“Zipy has been a 2-in-1 solution for us. Signed up solely for error debugging, but the session playback was so smooth that we also ended up ditching a well-known session recording tool.”

Vahe Hovhannisyan, Founder

Read this twice  - Zipy's Happy Customer
Vahe Hovhannisyan  - Zipy's Happy Customer

“We use Zipy as a UX Performance & Debugging Tool. Every time there is a feature release, the testers use it to find issues. We really enjoy working with Zipy, they're very responsive & proactive.

Vineet Jawa, Founder  - Zipy's Happy Customer
Vineet Jawa  - Zipy's Happy Customer


Replay errors, instead of recreating them

Replay and analyze errors efficiently. Utilize our session replay tools to uncover the causes of Svelte errors or UX issues, capturing detailed context from DOM events, console logs, and network interactions. Our Svelte debugger aligns error monitoring with user interactions for insightful analysis

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Zipy session replay - svelte
Zipy user environment - svelte


See the whole story, no secrets

Gain complete insights into user interactions. Capture comprehensive user environment data to accurately replicate Svelte bugs, including browser, OS, location, and custom user parameters. Stay proactive in bug resolution with our Svelte debugger.

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Custom error logging with the magic of Zipy logs

Tailored error logging for your Svelte apps. Beyond standard console logs, Zipy allow for custom Svelte exceptions, messages, and error logging, enabling personalized debugging and error tracking. Filter and analyze error sessions effectively with our advanced Svelte debugger.

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Zipy custom logs - svelte

Works seamlessly with your stack

Zipy for ReactJSZipy for Vue.jsZipy for AngularZipy for Next.jsZipy for JqueryZipy for EmberZipy for JavaScriptZipy for AndroidZipy for ios

Frequently Asked Questions

If you have any more questions, feel free to reach out to us at

How do I debug svelte in browser?

To debug a Svelte application in a browser, start by launching the development server with $ npm run dev in your terminal. Then, in Visual Studio Code, open the debugger by clicking the Run icon in the activity bar and press the green 'RUN' button to begin the session. Next, open your browser, navigate to your Svelte application, and open the Developer Tools (right-click on the page and select 'Inspect' or use Ctrl+Shift+I/Cmd+Opt+I). Here, you can inspect HTML and CSS in the 'Elements' tab, view logs and errors in the 'Console', and set breakpoints in the 'Sources' tab to step through your code. Also, pay attention to reactive updates in your Svelte components, and consider using Svelte-specific browser tools or extensions for a more detailed debugging experience.

How do you debug a svelte component?

To debug Svelte components, start by using @debug tags to pause execution and inspect variable values at specific points in your code. Additionally, leverage reactive statements to automatically log the values of variables whenever they change, helping you track data flow and state changes. For more in-depth analysis, use browser developer tools like the 'Console' and 'Sources' tabs for real-time debugging. Combining these methods provides a robust way to understand and resolve issues in your Svelte components.

What is Svelte used for?

Svelte is a modern JavaScript framework used for building highly efficient and interactive web applications. Unlike traditional frameworks that apply updates to the DOM in response to data changes, Svelte is a compiler that generates optimized JavaScript code at build time. This results in faster, more responsive applications with minimal overhead. It requires a development environment with Node.js and npm for compiling and building apps. The primary objective of using Svelte is to create web applications that are both performant and easy to develop. It simplifies the development process by eliminating the need for complex state management and reducing boilerplate code, making it an excellent choice for developers looking to build sleek, modern web interfaces with improved performance.

Is Svelte a frontend?

Yes, Svelte is indeed a frontend framework. It's an innovative open-source tool specifically designed for building interactive web applications. What sets Svelte apart from traditional frontend frameworks is its unique approach to processing components. Instead of relying on a runtime library to interpret and render components on the fly, Svelte handles much of this work at compile-time. This shift results in significantly more efficient applications, as it reduces the amount of code that needs to be executed in the browser, leading to faster load times and improved performance. By compiling its components into highly optimized vanilla JavaScript, Svelte streamlines the development process and enhances the end-user experience, making it a revolutionary choice in the realm of frontend development.

How do I debug a Svelte app?

"Debugging a Svelte application can be effectively done using several approaches. The most straightforward method is the use of @debug tags in your Svelte files. By including @debug followed by the variable names, the execution will pause at these points, allowing you to inspect the current state and values of your variables. This is especially helpful for identifying unexpected behaviors in your data. Another powerful method involves reactive statements. Svelte’s reactivity model automatically updates the UI in response to data changes. By using reactive statements, you can log the values of any variables whenever they change, giving you real-time insight into how data flows and updates within your app."

Empower your Svelte app with Zipy

Zipy, online svelte debugger, provides you with full customer visibility without multiple back and forths between Customers, Customer Support and your Engineering teams.

The unified digital experience platform to drive growth with Product Analytics, Error Tracking, and Session Replay in one.

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