ETL Builder

What is ETL Builder?

ETL Builder is a free, browser-based tool that helps you produce ready-to-use output in seconds. Upload, transform, map, and export 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

• Data engineers
• Analytics engineers
• Database administrators
• Operations teams
• 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 ETL Builder

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

3. 3

   Next recommended tool

   One-Click Fix Pipeline: Analyze, repair, explain, and export a cleaned CSV dataset with before-and-after health scores.

   Open tool
4. 4

   Then continue with

   Data Validation Pipeline: Chain validators on a dataset and surface row-level failures.

   Open tool
5. 5

   Then continue with

   Merge Datasets: Concatenate or join two tabular files.

   Open tool

Frequently asked questions

How do I use ETL Builder?

Paste or drop your data into the workspace, adjust the options to fit your data, then copy or download the result. Upload, transform, map, and export 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 ETL 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.