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HTTP/2 200
content-type: text/html; charset=utf-8
date: Sat, 27 Dec 2025 15:18:43 GMT
access-control-allow-origin: *
cache-control: public, max-age=0, must-revalidate
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referrer-policy: strict-origin-when-cross-origin
x-content-type-options: nosniff
vary: accept-encoding
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content-encoding: gzip
server: cloudflare
cf-ray: 9b49cac94a84cf40-BOM
x-cache: Miss from cloudfront
via: 1.1 eacc4bc352ad91f6c2b8728046877502.cloudfront.net (CloudFront)
x-amz-cf-pop: BLR50-P4
x-amz-cf-id: i5oUgQL_R2s-GdVjOhagrDwbgJHbSg9gfAQ64dn2yaEGOjF1Cfp__Q==
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Introducing WebContainers: Run Node.js in your browser Read the release 
Bolt is powered by WebContainers, the first WebAssembly-based micro operating system which boots entire development environments in milliseconds, securely within your browser tab.
What about online IDEs?
Legacy cloud-based IDEs run on remote servers and stream the results back to your browser. This approach yields few security benefits and provides a worse experience than your local machine in nearly every way.
With StackBlitz, all compute occurs inside your browser, making use of decades of speed and security innovations.
 | Legacy Online IDEs | |
|---|---|---|
| Boot time | Milliseconds
| Minutes
|
| Zero network latency | ||
| Work offline | ||
| Easily debug broken containers | ||
| Reset broken containers | Page refresh
| Not possible
|