
CodeSandbox
An online React editor with a focus on sharing
CodeSandbox launched on June 12, 2017 with 21 votes, #776 of 3,107 launches that month and more than 50% of that year's launches. The site was still online in September 2026, 9 years on.
What it does
CodeSandbox is a cloud development platform that empowers developers to code, collaborate and ship projects of any size from any device in record time.
Use our APIs to create isolated development environments (sandboxes) that can run any type of code you need. Every environment runs in isolation, so you can safely run untrusted code without it affecting your system. We can handle millions of concurrent VMs and make it easy to provision, manage and decommission VMs. Resume development within the same sandbox after periods of inactivity. With no loss thanks to our snapshots. Our microVM infrastructure allows us to spin up entire VMs, clone them and restore snapshots within 2 seconds. Gain total control over periods of inactivity before auto hibernation kicks in. Give agents a sandbox to resolve user prompts, or create autonomous agents…from codesandbox.io
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