Aggregation Builder

What is Aggregation Builder?

Aggregation Builder is a free, browser-based tool that helps you produce ready-to-use output in seconds. Build GROUP BY / HAVING / window aggregations visually. It's built for speed and privacy: Everything runs locally in your browser — your data is never uploaded to a server. No sign-up, no installs, and no daily limits.

Used by

• Database administrators
• Backend developers
• Data engineers
• Students
• Developers
• Test-data teams

Recommended workflow

1. 1

   Prepare the input

   Generate a sample or helper artifact, then copy it into the workflow that needs it.

2. 2

   Run Aggregation Builder

   Review the preview, copy or download the result, and keep everything local in your browser.

3. 3

   Next recommended tool

   Pivot Table Builder: Build pivots without Excel.

   Open tool
4. 4

   Then continue with

   SQL Query Builder: Build SELECT/JOIN queries with a form.

   Open tool
5. 5

   Then continue with

   SQL Query Formatter: Format ugly SQL into readable layouts.

   Open tool

Frequently asked questions

How do I use Aggregation Builder?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Build GROUP BY / HAVING / window aggregations visually.

Is my data uploaded or stored anywhere?

No. Everything runs locally in your browser — your data is never uploaded to a server. Nothing is sent to a server, so it's safe to use with private or sensitive data.

Is Aggregation Builder free?

Yes — it's completely free with no account, no sign-up, no watermark, and no daily usage limits.

What's the maximum file size?

There's no hard limit imposed by the tool. Because processing happens in your browser, the practical ceiling is your device's available memory — most everyday files work instantly.

Do I need to install anything?

No installs and no extensions — it runs entirely in your web browser and even works offline once the page has loaded.