ETL Builder Online - Free Browser Tool

Source format

Source data (CSV or JSON)JSON

Pipeline · 5 steps

1Trim whitespace6 rows

Trims leading/trailing whitespace in every cell.

2Deduplicate5 rows

3Filter rows3 rows

4Compute column (math)3 rows

5Sort3 rows

numeric

Table view3rows·6columns

id	name	city	spend	active	spend_with_tax
3	Cy Borg	London	2480	yes	2976
1	Ada Lovelace	London	1299	yes	1558.8
4	Di Ode	Berlin		yes

Tip: use samples, upload, copy, download, and send-to actions inside the workspace where available.

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.

How to use ETL Builder

1Configure the options to describe what you need.
2The output is generated instantly and updates as you tweak settings.
3Copy the generated result or download it.

Features

Live output that updates with every option
Copy or download the generated result
100% client-side — no upload, fully private
Free with no account, no watermark, and no daily limit
Works on large inputs, limited only by your device's memory
Load a sample, then copy, download, or share your result

Common uses

Prototyping a data pipeline with no code
Quick one-off generator jobs without opening a heavy app
Preparing data before importing it elsewhere
Sharing a reproducible result with a teammate via a link

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.

name

city

spend

active

spend_with_tax

Cy Borg

London

2480

yes

2976

Ada Lovelace

London

1299

yes

1558.8

Di Ode

Berlin

yes

What is ETL Builder?

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.