# Vercel Sandbox now support Custom Images

By Steven Van · 2026-06-30

The public beta lets a sandbox boot from any image pushed to Vercel Container Registry instead of a managed image.

[Vercel](<https://creatorstoolbox.com/tools/vercel>) Sandbox can now boot from a custom root filesystem instead of only its managed images. [Custom images](<https://vercel.com/docs/sandbox/concepts/images>) are in public beta as of 30 June 2026, pulled from Vercel Container Registry, so any image pushed with docker push is available to a sandbox immediately.

The point is to bring an existing OS, toolchain and dependencies into a sandbox without spinning up compute to create a Snapshot first. Custom images still boot from a precompiled snapshot in the same format as Sandbox Snapshots, so cold start performance isn't affected.

[![](<https://vercel.com/api/docs-og?title=Images&format=docs&sig=35420a1b1d7f9ce4751e74c1db0cb0edf720ecc03ff2680009ba8e69744ffe19&category=Run%20agents%20and%20backends&subcategory=Sandbox&subcategory2=Concepts>)](<https://vercel.com/docs/sandbox/concepts/images>)

![Vercel](<https://www.google.com/s2/favicons?domain=vercel.com&sz=128>)

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Sources

[Original source](<https://vercel.com/docs/sandbox/concepts/images>)

[Read Vercel Sandbox now support Custom Images on Creators Toolbox](<https://creatorstoolbox.com/blog/vercel-vercel-sandbox-now-support-custom-images>)

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Canonical source: https://creatorstoolbox.com/blog/vercel-vercel-sandbox-now-support-custom-images