Email Splitter

Upload or paste a mailing list, clean it, and split it into batches you can use for campaigns or outreach.

Turn one messy list into neat campaign-ready batches.

Process TXT or CSV email lists in the browser, remove duplicates, filter invalid entries, sort them, and export every batch in the format you need.

Bulk list cleanupDeduplicate and validate before sending.

Flexible split sizesUse preset or custom batch limits.

Private processingYour list stays on your device.

1. Input Emails

Drag and drop a TXT or CSV file here

or click to browse

You can also paste emails manually, separated by commas, spaces, or new lines.

2. Settings

Emails per batch

Remove duplicate emails Remove invalid addresses Sort alphabetically

Export format

Features and benefits

Campaign-safe batching

Break oversized mailing lists into segments that fit your sending platform or campaign plan.

Cleanup before export

Remove duplicates and optionally filter invalid addresses before you download any batch.

TXT or CSV output

Export in the format that matches your workflow and email software.

How to Use the Email Splitter

Add your email list

Upload a TXT or CSV file, or paste your email addresses directly into the input box using commas, spaces, tabs, or line breaks.

Choose your batch settings

Set the number of emails per batch and decide whether to remove duplicates, remove invalid addresses, and sort the final output.

Split and export the results

Generate your batches, review the totals, then download each batch individually or export all batches together as a ZIP file.

Frequently Asked Questions

What separators are supported?

The tool accepts line breaks, commas, spaces, and tabs, so most pasted lists work without extra cleanup.

Can I choose a custom batch size?

Yes. Select the custom option and enter any batch size greater than zero.

Will duplicate emails be removed automatically?

Yes, if duplicate removal stays enabled. The tool compares addresses case-insensitively before exporting results.

Can I export in CSV and TXT?

Yes. Choose your preferred format before processing, and all downloads will use that file type.

Does it upload my contacts anywhere?

No. The processing happens in your browser, so your email list is not sent to an external server.

Can I create a ZIP of all batches?

Yes. After splitting, use the ZIP download button to export all generated batches together.