Edge Function bundle size issues

Last edited: 2/6/2026

Edge Functions have a 10MB source code limit. If your function exceeds this limit, deployment will fail.

Check your bundle size#

Use the deno info command to analyze your function's dependencies and total size:

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deno info /path/to/function/index.ts

Look for the "size" field in the output to see the total bundle size.

How to reduce bundle size#

If your bundle is too large, try these strategies:

Remove unused dependencies#

Review your imports and remove any packages you're not actively using.

Use selective imports#

Instead of importing entire packages, import only the specific modules you need:

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// Good: Import specific submodules
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import { specific } from 'npm:package/specific'
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// Avoid: Import entire package
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import * as everything from 'npm:package'

Split large functions#

Consider breaking large functions into smaller, more focused functions. Each function can handle a specific task, reducing the code needed in any single deployment.

Choose lightweight alternatives#

Research smaller packages that provide the same functionality. Many NPM packages designed for Node.js include unnecessary polyfills that increase bundle size.