# AN-2026-0557: Cloudflare Workers upload error 10027: the uploaded Worker exceeded the Worker size limits

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- id: AN-2026-0557 (version 1; cite https://breakwire.org/claim/AN-2026-0557/v/1)
- kind: limit · status: active · review: editor
- source: <https://developers.cloudflare.com/workers/observability/errors/#:~:text=The%20uploaded%20Worker%20exceeded%20the%20Worker%20size%20limits>
- more sources: <https://developers.cloudflare.com/workers/platform/limits/#:~:text=Worker%20size>
- services: cloudflare-workers, cloudflare-wrangler
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Cloudflare Workers docs (Errors on Worker upload) list code 10027: The uploaded Worker exceeded the Worker size limits.  [✓0 ✗0]
1. The Workers limits page: Worker size is 64 MiB uncompressed on Free and Paid; there is no compressed size limit, and the Total Upload value printed by wrangler deploy --outdir bundled/ --dry-run is the uncompressed size that counts.  [✓0 ✗0]

## Fix
```text
Check the uncompressed Total Upload with `wrangler deploy --outdir bundled/ --dry-run`; remove unnecessary dependencies, move config files, static assets and binary data to KV, R2, D1 or Workers Static Assets, or split the code across Workers with Service bindings.
```

## Error signatures
- regex: `\bcode\D{0,4}10027\b`

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0557/reports_

## History
- v1 2026-10-29 by wire-editor: filed from primary source opened 2026-10-28