Patching A Flood of 404s

Documentation serves as a roadmap, guiding you toward reliable and high-performing code. Like maps that evolve to reflect new roads and infrastructure, our docu...

Navigating Cookies at Sentry: A Legal Perspective

You may have noticed that the banners asking you to accept “cookies” whenever you visit a website have gotten bigger and more annoying over time, especially if ...

January monthly product update

With January over, 2024 is in full swing. Read on below to find out more about the Metrics Alpha, Cron Monitoring GA, SDK improvements, and more. Cron Monitorin...

How to deal with API rate limits

When I first had the idea for this post, I wanted to provide a collection of actionable ways to handle errors caused by API rate limits in your applications. Bu...

Terms of Service Update

This post is outdated. Read our AI Privacy Principles for our most up-to-date approach to generative AI. We talked about changing our Terms of Service in supp...

Debugging weird stack traces with Session Replay

Imagine this: Your website is getting a lot of traffic and you have some kind of metrics, logging, or performance monitoring setup (maybe even Sentry). You’re a...

Understanding Middleware: A Developer's Guide

As developers, we often encounter the term "middleware" in the context of building web applications, APIs, and backend systems. But what exactly is middleware, ...

Cron Monitoring is Now Generally Available

Sentry Cron Monitoring alerts you when your scheduled jobs fail and gives you the context you need to fix it - like we do with error and performance issues. Cro...

Now’s The Time For Delayed Open Source

Sentry was born and bred in the Open Source community, and we very much think of ourselves as part of it today. One thing we’ve learned together over the years ...

Privacy by Default

While companies tout the importance of user privacy, few put their money where their mouth is – or in our case, actually live and breathe the concept the way we...

We removed advertising cookies, & here’s what happened

This is not another abstract post about what the ramifications of what a cookieless future might be; Sentry actually removed cookies from our website a few mont...

December Monthly Product Update

Let’s cut right to it. Read on to learn about all the product updates from our oddly productive December. From new tools to help with debugging while in develop...

Browser Profiling Learnings from Sentry.io

Since enabling browser profiling on our Sentry.io dashboard a month ago, we have collected over 2M profiles and learned a lot about how our users experience our...

Enhancing Security Transparency: Sentry's New Public Security Advisories Repo

As developers, staying informed about security vulnerabilities is crucial for safeguarding our products and, ultimately, our users. Sentry is taking a bold step...

AI, Privacy and Terms of Service Updates

Update Hey everyone. We’ve gotten your feedback and heard your concerns; we were less than artful in expressing our intentions. Many of the things that people ...

Fix your actual slow-loading assets with Resource Monitoring

Slow-loading assets on your web pages can lead to frustrated users, high bounce rates, and lost conversions. For the vast majority of websites, slow-loading res...

Leveraging our new User Feedback widget to improve our Performance product

While Sentry can automatically detect unhandled exceptions, poor performance, and even signals of user frustration such as rage clicks, there are some problems ...

Fetch Waterfall in React

Have you seen this problem? Or maybe this one? You’ve most likely seen this: export const Component = () => { const [data, setData] = useState() const [load...

Sentry Bundle Size: How We Reduced Replay SDK by 35%

Bundle Size matters - this is something we SDK engineers at Sentry are acutely aware of. In an ideal world, you'd get all the functionality you want with no add...

Fallbacks for HTTP 404 images in HTML and JavaScript

Your images are 404ing all over the place. You’ve got an angry email from a client. Their site is “broken”, images aren’t loading, cumulative layout shift is ru...

November product updates for Sentry

Grab your favorite mug, fill it with some warm chocolatey goodness – it is hot cocoa season after all –, and check out our most recent product updates to Sentry...

Spotlight: Sentry for Development

A long time ago I worked on a project called Django Debug Toolbar (DJDT). It was a local development plugin that would give you a debug overlay within Django’s ...

Fixing memoization-breaking re-renders in React

React’s component-based approach to building web applications allows us to break up our web apps into smaller components that we can easily reuse. When a compon...

Introducing the Functional Source License: Freedom without Free-riding

Sentry started life in 2008 as an unlicensed, 71-line Django plugin. The next year we began publishing it under BSD-3, and ten years later we switched to the Bu...

SDK & Integration Updates: Sentry for every platform, framework, and tool

It seems like these days there’s a new exciting framework or dev tool launched every week. The challenge is that even if you’re ready and able to use new produc...

Sentry’s EU Data Region Now in Early Access

Like many of our customers, Sentry takes privacy and data sovereignty seriously. One of Sentry’s values is to be for “Every Developer,” and we can’t do that wit...

Not Every Problem is an Error: Introducing Rage and Dead Clicks + New User Feedback Reports

I know, we’re Sentry the error and performance monitoring platform and we catch production issues. But as you (hopefully) saw during our Launch Week announcemen...

Performance Monitoring for Every Developer: Web Vitals & Function Regression Issues

Extracting relevant insights from your performance monitoring tool can be frustrating. You often get back more data than you need, making it difficult to connec...

A story about HTTP status codes and why you should read documentation

Since 2020, I’ve been working on an Express (Node.js framework) application to power viewer interactions and events that happen whilst I’m streaming live coding...

Next.js SDK Security Advisory - CVE-2023-46729

TL;DR We released a critical security advisory today for Sentry’s Next.js SDK. In the SDK versions 7.26.0-7.76.0 (inclusive), when the tunnelRoute option is ena...

Improved GraphQL Support in Sentry

Beautiful syntax-highlighted GraphQL errors are coming — get ‘em while they’re fresh! Not that we encourage you to add more errors of any kind to your code. But...

October Product Updates for Sentry

Hey, you. Yes, you. Do you want to fix broken code faster and easier? Of course, you do. Who doesn’t? Well, lucky for you, we dedicated the whole month of Octob...

We Just Gave $500,000 to Open Source Maintainers

Want to hear more? Register for “The Future of Open Source: The State of Sustainability”, on October 26. Sentry is an Open Source-aligned company, and our missi...

September Product Updates for Sentry

It’s official, summer is over. So grab yourself a pumpkin-spiced food item of choice and check out what the Sentry team has been up to this past month. From int...

How to identify and fix Render-Blocking Resources

Render-blocking resources are JavaScript and CSS files that prevent the web page from loading until they are downloaded. These might be critical resources that ...

Intern Gino develops the Kotlin Multiplatform SDK

Gino, a student at the Vienna University of Technology, spent the summer of 2023 as a software engineer intern with the Mobile SDK team. We asked him to share a...

Intern Michelle integrates Sentry with Opsgenie

Michelle Fu, a student at Stanford University, spent the summer of 2023 as a software engineer intern with the Sentry Enterprise team. We asked her to share a l...

Intern Nikki helps developers find performance trends

Nikki Kapadia, a student at Toronto Metropolitan University, spent the summer of 2023 as a software engineer intern with the Sentry Performance team. We asked h...

Intern Ryan helps Sentry find and fix customer pain points

Ryan Suh, a student at Stanford University, spent the summer of 2023 as a product marketing intern with the Sentry Marketing team. We asked him to share a littl...

Intern Spencer gives you Issue alerts in Discord

Spencer, a student at the University of Toronto, spent the summer of 2023 as a software engineer intern with the Sentry Issues team. We asked him to share a lit...

Intern Lucas makes it easier to hire at Sentry

Lucas Hatae, a student at Cal Poly San Luis Obispo, spent the summer of 2023 as a BizOps intern with the Sentry BizOps team. We asked him to share a little abou...

Intern Jack improves the Kubernetes agent for Sentry Crons

Jack Zhang, a student at Dartmouth College, spent the summer of 2023 as a software engineer intern with the Sentry Dev Infra team. We asked him to share a littl...

Intern David enables queries against production data

David Tsukernik, a student at the University of Toronto, spent the summer of 2023 as a software engineer intern with the Sentry Search and Storage team. We aske...

Intern Chloe improves Sentry integration health

Chloe Ho, a student at Bernard College, spent the summer of 2023 as a software engineer intern with the Sentry Issues team. We asked her to share a little about...

Flutter Debugging: Top Tips and Tools You Need to Know

Modern applications are complex, interconnected collections of services and moving parts that all have the potential to fail or not work as expected. Flutter an...

Find slow database queries with Query Insights

There’s only so much you can control when it comes to your app’s performance. But you control what is arguably most important - the code. Sentry Performance get...

From LCP to CLS: Improve your Core Web Vitals with Image Loading Best Practices

If you’re a front end developer, there’s a high probability you’ve built (or will build) an image-heavy page. And you’ll need to make it look great by serving h...

Find Trending Problems Faster with Escalating Issues

Knowing what issues to hit the snooze button on, or drop everything and push a hotfix for is a common developer dilemma. Similarly to what was discussed in Slee...

Responsive Images: A cheap trick to improve page performance

Being a frontend developer, I’m always looking for ways to improve page load and render time performance issues. One of my biggest annoyances is when I’m waitin...

Fly.io with Sentry

When developers build and deploy their apps, understanding what's slow or broken in production is more a necessity than a convenience. With Sentry, developers a...

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