twenty/packages/twenty-docs/user-guide/data-migration/capabilities/file-formats.mdx
StephanieJoly4 183d034716
User guide structure update (#16705)
Reorganizing by Feature sections

Capabilities folders to give an overview of each feature

How-Tos folders to give guidance for advanced customizations

Reorganized the Developers section as well, moving the API sub section
there

added some new visuals and videos to illustrate the How-Tos articles

checked the typos, the links and added a section at the end of the
doc.json file to redirect existing links to the new ones (SEO purpose +
continuity of the user experience)

What I have not updated is the "l" folder that, per my understanding,
contains the translation of the User Guide - that I only edited in
English

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2025-12-22 09:07:06 +01:00

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---
title: Supported File Formats
description: File formats supported for data import in Twenty.
---
## Supported Formats
Twenty supports three file formats for import:
| Format | Extension | Notes |
|--------|-----------|-------|
| **CSV** | .csv | Recommended, most compatible |
| **Excel** | .xlsx | Modern Excel format |
| **Excel (Legacy)** | .xls | Older Excel format |
## File Requirements
| Requirement | Value |
|-------------|-------|
| **Encoding** | UTF-8 recommended |
| **Record limit** | 10,000 records per file |
| **Structure** | First row must contain column headers |
| **Content** | One object type per file |
## CSV Best Practices
- **Delimiter**: Use comma (`,`) or semicolon (`;`)
- **Text qualifier**: Use double quotes (`"`) for text containing commas
- **Line endings**: Windows (CRLF) or Unix (LF) both supported
- **Empty values**: Leave cells empty, don't use "NULL" or "N/A"
## Excel Best Practices
When exporting from Excel:
- Remove formulas (export values only)
- Delete empty rows at the end
- Ensure no merged cells
- Use the first sheet only
## Large Datasets
For datasets larger than 10,000 records:
- Split into multiple files
- Or use the [API import](/user-guide/data-migration/how-tos/import-data-via-api) for unlimited records
<Note>For very large migrations (100,000+ records), the API is significantly faster and more reliable than CSV imports.</Note>