---
title: Increased blob size limits in Workers Analytics Engine
description: We’ve increased the total allowed size of blob fields per request from 5 KB to 16 KB in the Workers Analytics Engine.
image: https://edgetunnel-b2h.pages.dev/changelog-preview.png
---

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## Increased blob size limits in Workers Analytics Engine

Jun 20, 2025 

[ Workers ](https://edgetunnel-b2h.pages.dev/workers/) 

We’ve increased the total allowed size of [blob](https://edgetunnel-b2h.pages.dev/analytics/analytics-engine/get-started/#2-write-data-points-from-your-worker) fields on data points written to [Workers Analytics Engine](https://edgetunnel-b2h.pages.dev/analytics/analytics-engine/) from **5 KB to 16 KB**.

This change gives you more flexibility when logging rich observability data — such as base64-encoded payloads, AI inference traces, or custom metadata — without hitting request size limits.

You can find full details on limits for queries, filters, payloads, and more [here in the Workers Analytics Engine limits documentation](https://edgetunnel-b2h.pages.dev/analytics/analytics-engine/limits/).

* [  JavaScript ](#tab-panel-2903)
* [  TypeScript ](#tab-panel-2904)

**JavaScript**

```js
export default {
  async fetch(request, env) {
    env.analyticsDataset.writeDataPoint({
      // The sum of all of the blob's sizes can now be 16 KB
      blobs: [
        // The URL of the request to the Worker
        request.url,
        // Some metadata about your application you'd like to store
        JSON.stringify(metadata),
        // The version of your Worker this datapoint was collected from
        env.versionMetadata.tag,
      ],
      indexes: ["sample-index"],
    });
  },
};
```

**TypeScript**

```ts
export default {
  async fetch(request, env) {
    env.analyticsDataset.writeDataPoint({
      // The sum of all of the blob's sizes can now be 16 KB
      blobs: [
        // The URL of the request to the Worker
        request.url,
        // Some metadata about your application you'd like to store
        JSON.stringify(metadata),
        // The version of your Worker this datapoint was collected from
        env.versionMetadata.tag,
      ],
      indexes: ["sample-index"],
    });
  }
};
```

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```