---
title = "Edge Function bundle size issues"
topics = [ "functions" ]
keywords = [ "bundle", "size", "limit", "dependencies", "edge function", "10MB" ]
database_id = "aaf9e673-64ae-460a-88e0-b83ea4963382"

[api]
cli = [ "supabase-functions-deploy" ]
---

Edge Functions have a 20MB 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:

```bash
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:

```tsx
// Good: Import specific submodules
import { specific } from 'npm:package/specific'

// Avoid: Import entire package
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.

## Additional resources

- [Unable to deploy Edge Function](./unable-to-deploy-edge-function)
- [Dependency analysis](./edge-function-dependency-analysis)
- [Edge Function limits](/docs/guides/functions/limits)
