---
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
---

> Documentation Index  
> Fetch the complete documentation index at: https://developers.cloudflare.com/changelog/llms.txt  
> Use this file to discover all available pages before exploring further. 

[Skip to content](#%5Ftop) 

# Changelog

New updates and improvements at Cloudflare.

[ Subscribe to RSS ](https://developers.cloudflare.com/changelog/rss/index.xml) [ View RSS feeds ](https://developers.cloudflare.com/fundamentals/new-features/available-rss-feeds/) 

![hero image](https://developers.cloudflare.com/_astro/hero.CVYJHPAd_26AMqX.svg) 

[ ← Back to all posts ](https://developers.cloudflare.com/changelog/) 

## 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-2741)
* [  TypeScript ](#tab-panel-2742)

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"],    });  },};
```

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"],    });  }};
```

```json
{"@context":"https://schema.org","@type":"BlogPosting","@id":"https://developers.cloudflare.com/changelog/post/2025-06-20-increased-blob-size-limits-in-workers-analytics/#page","headline":"Increased blob size limits in Workers Analytics Engine · Changelog","description":"We’ve increased the total allowed size of blob fields per request from 5 KB to 16 KB in the Workers Analytics Engine.","url":"https://developers.cloudflare.com/changelog/post/2025-06-20-increased-blob-size-limits-in-workers-analytics/","inLanguage":"en","image":"https://developers.cloudflare.com/changelog-preview.png","dateModified":"2025-06-20","datePublished":"2025-06-20","publisher":{"@type":"Organization","name":"Cloudflare","url":"https://www.cloudflare.com/"},"isPartOf":{"@type":"WebSite","@id":"https://developers.cloudflare.com/#website","name":"Cloudflare Docs","url":"https://developers.cloudflare.com/"}}
```