---
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://developers.cloudflare.com/changelog-preview.png
---

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## Increased blob size limits in Workers Analytics Engine

Jun 20, 2025 

[ Workers ](https://developers.cloudflare.com/workers/) 

We’ve increased the total allowed size of [blob](https://developers.cloudflare.com/analytics/analytics-engine/get-started/#2-write-data-points-from-your-worker) fields on data points written to [Workers Analytics Engine](https://developers.cloudflare.com/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://developers.cloudflare.com/analytics/analytics-engine/limits/).

* [  JavaScript ](#tab-panel-1536)
* [  TypeScript ](#tab-panel-1537)

JavaScript

```

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"],

    });

  },

};


```

Explain Code

TypeScript

```

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"],

    });

  }

};


```

Explain Code