# XLSX CSV Batch Converter

Batch convert CSV/TSV to XLSX or convert XLSX back to CSV/TSV with delimiter and encoding handling

> Canonical page: https://elysiatools.com/en/tools/xlsx-csv-batch-converter

- **Category:** Format Conversion

- **Keywords:** xlsx, csv, tsv, batch, encoding, delimiter, excel

## Overview

Batch conversion for spreadsheet text formats.

- CSV/TSV/TXT -> XLSX
- XLSX/XLS -> CSV/TSV
- Auto mode detects direction by extension

Designed to reduce delimiter and text-encoding problems in cross-platform workflows.

## Inputs

- **Source Files** (file)
- **Conversion Mode** (select)
- **Source Text Encoding** (select)
- **Output Text Encoding** (select)
- **Input Delimiter** (select)
- **Output Delimiter** (select)
- **Sheet Name** (text): Sheet1
- **Include Header** (checkbox)
- **Always Return ZIP** (checkbox)

## When to use

- When you need to convert multiple CSV or TSV files into a single Excel workbook format.
- When you need to export large Excel datasets into CSV format for database imports or legacy system compatibility.
- When you encounter character encoding issues or incorrect column separation in your spreadsheet data.

## How it works

- Upload your source files and select the conversion mode, or use 'Auto' to let the tool detect the format based on file extensions.
- Configure your preferred text encoding and delimiters to ensure data integrity during the conversion process.
- Choose whether to output individual files or a compressed ZIP archive for efficient batch handling.
- Execute the conversion and download your processed files instantly.

## Use cases

- Standardizing data exports from multiple sources into a unified Excel format for reporting.
- Preparing clean CSV files for SQL database ingestion by setting specific delimiters and encodings.
- Archiving large sets of spreadsheet data into a single, compressed ZIP file for easier storage and transfer.

## Frequently asked questions

### Can I convert multiple files at once?

Yes, the tool supports batch processing for up to 50 files simultaneously.

### How do I fix mojibake or garbled text?

Select the correct 'Source Text Encoding' (e.g., UTF-8, GBK, or Shift_JIS) that matches your original file to resolve character display issues.

### Does it support tab-separated values?

Yes, you can specify 'Tab' as the input or output delimiter to handle TSV files correctly.

### Why should I use UTF-8 with BOM?

Using UTF-8 with BOM is recommended when exporting to CSV to ensure that spreadsheet applications like Excel correctly recognize the file encoding and display special characters properly.

### What is the maximum file size?

The tool supports individual file uploads up to 100MB.

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## Samples

- [XLSX Samples](https://elysiatools.com/en/samples/xlsx-samples): Sample XLSX spreadsheets for worksheet parsing and data extraction testing
- [XLS Samples](https://elysiatools.com/en/samples/xls-samples): Sample legacy Excel (XLS) files for binary spreadsheet parsing and import tests
- [Windows String Processing - C# Samples](https://elysiatools.com/en/samples/windows-string-processing-csharp): Comprehensive C# string processing examples for Windows platform including string manipulation, splitting, joining, regex operations, and text analysis
- [CSV Samples](https://elysiatools.com/en/samples/csv-samples): Sample CSV files with various data types, sizes, and complexity levels

## Related content

- [Tabular Data Conversion Workflow](https://elysiatools.com/en/hubs/csv-convert): Convert CSV, spreadsheets, JSON, HTML tables, Markdown, XML, and text while checking headers, delimiters, types, and encoding.
- [XLSX ETL Ingestion and Warehouse Handoff](https://elysiatools.com/en/hubs/xlsx-etl-ingestion-workflows): Turn mixed workbook and CSV sources into traceable, schema-aware outputs for SQL loading, Parquet pipelines, and object-storage batch handoff.