Last updated: November 10, 2026
Is StackBlitz down? User reports indicate possible problems with StackBlitz
StackBlitz is an online development environment that runs full Node.js projects inside the browser using its WebContainers technology. Developers use it to build, test, and share web apps without installing anything on their own machines.
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StackBlitz problems reported in the last 24 hours
Most reported problems
All quiet. No issues reported in the last 24 hours.
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How would you rate StackBlitz over the past 3 months?
Most reported locations
Where StackBlitz reports are coming from in the last 24 hours.
No problem locations to show yet. StackBlitz looks fine right now. Locations appear here as soon as users submit reports.
Latest StackBlitz user reports
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StackBlitz outage history
Our latest check and the live report status for StackBlitz.
✓ Our latest check (8 November 2026, 3:40 AM PKT): stackblitz.com answered normally in 596 ms.
Good news. StackBlitz has no reported problems right now. If it is not working for you, report it above and your report will appear here.
StackBlitz uptime and reports
Live report counts and the day by day record for the last 30 days.
User reports received in each period.
Last 30 days, day by day: 11 October 2026 to 9 November 2026
Green: up. Red: outage. Amber: some checks failed. Grey: no record yet.
The daily record builds from today as our checks run. Grey days have no saved record yet. A red day marks a confirmed outage.
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StackBlitz on social media
An early signal from outside our site, watched in rotation.
Posts on Bluesky saying StackBlitz is down. Checked 8 November 2026, 1:15 PM PKT.
Quiet right now. Nobody on Bluesky is saying StackBlitz is down.
Guides that can fix it
Step by step fixes for the problems people report most.
→ An App Is Not Working? Fixes for Android and iPhone
→ Login Problems That Are Not an Outage
→ How to Clear the Cache in Firefox, Safari and Edge
Is StackBlitz Down Right Now?
No. StackBlitz is working normally right now. Projects are booting, previews are rendering, and saves are going through.
When a project will not start, the browser is the first suspect. StackBlitz runs a real Node.js runtime inside your tab, and that needs features only some browsers fully support. Check the points below before blaming the service.
Is StackBlitz Down for Me or Everyone?
Open one of the public starter projects, like the plain JavaScript starter. If it boots and runs, the platform is fine and your project or browser setup is the blocker.
A genuine StackBlitz outage stops starters too. Editors hang on the boot screen for everyone, and saves fail across accounts. The live StackBlitz status reports on this page show that pattern within minutes.
Why Does StackBlitz Say WebContainer Failed to Boot?
WebContainers need a secure page with cross-origin isolation turned on. If those headers are missing or blocked, the runtime cannot start and boot fails.
This often happens inside embedded frames or strict company browsers. Open the project in a normal top-level tab in Chrome or Edge and try again.
Why Does StackBlitz Only Work Well in Chrome?
The runtime leans on browser features that Chromium browsers ship first. Firefox and Safari support has grown, but some projects still fail or crawl outside Chrome and Edge.
For heavy projects, use a current Chromium browser and close other demanding tabs. The runtime shares your machine’s memory, so a busy laptop slows the editor fast.
Why Is My StackBlitz Project Not Saving?
Signed-out sessions and expired logins silently stop saving. Your work then lives only in that tab, and a refresh can lose it.
Check that you are signed in, then use the fork option to save a copy under your account. Forking also protects your work before you try risky fixes.
Why Does npm Install Fail Inside StackBlitz?
Packages run in the browser runtime, not on a normal server. Packages that need native builds or system tools can fail even though they install fine on your machine.
Read the first error line in the terminal, since later lines repeat it. Swapping the package for a pure JavaScript alternative usually clears the way.
Common StackBlitz Problems and Fixes
Boot a Project That Hangs on Loading
Hard refresh the page, then reopen the project. If it still hangs, open it in Chrome or Edge in a fresh window with extensions off. Most boot failures clear there.
Fix a Blank Preview Pane
Restart the dev server from the terminal by stopping it and running the start command again. Check the terminal output for a port or build error before refreshing the preview.
Save Work From an Expired Session
Fork the project from the menu to store a copy under your account. If you were signed out, sign in first. Then compare the fork with your tab before closing anything.
Clear a Stuck Terminal
Open a new terminal tab inside the editor instead of fighting the stuck one. Kill long-running commands with the trash icon. A fresh terminal avoids a full page reload.
Speed Up a Slow Editor
Close other heavy browser tabs and pause sync tools that watch files. Large projects with many dependencies run better after you remove unused packages from package.json.
Having a problem with StackBlitz?
Comments are public and help others understand the issue.
Frequently Asked Questions
Why won’t my StackBlitz project load?
Most load failures are browser issues. WebContainers need a Chromium browser with cross-origin isolation. Open the project in Chrome or Edge in a normal tab, not inside an embedded frame.
Why does StackBlitz need Chrome or Edge?
Its WebContainers runtime uses browser features that Chromium ships in full. Firefox and Safari work for some projects, but complex ones can fail. Chrome and Edge give the most reliable results.
Why is my StackBlitz project not saving?
You are likely signed out or your session expired. Sign in and fork the project to save a copy. Work in an unsaved tab can be lost on refresh, so fork early.
What does WebContainer failed to boot mean?
The in-browser Node.js runtime could not start. Missing isolation headers, embedded frames, or strict browser policies cause it. Open the project in a top-level Chrome or Edge tab.
Why is npm install failing in StackBlitz?
The browser runtime cannot build native packages or use system tools. Read the first terminal error. Replacing the package with a pure JavaScript one usually fixes the install.
Why is StackBlitz so slow on my machine?
The runtime shares your computer’s CPU and memory. Close heavy tabs, remove unused dependencies, and avoid running several dev servers at once inside one project.