# XLSX CSV Detect Normalize Auto-detect CSV delimiter/encoding (UTF-8/GBK), normalize the table, and import to XLSX/CSV > Canonical page: https://elysiatools.com/en/tools/xlsx-csv-detect-normalize - **Category:** Format Conversion - **Keywords:** csv, detect, normalize, encoding, delimiter, xlsx, gbk ## Overview Normalize messy CSV before spreadsheet import. - Detects encoding (`UTF-8`/`GBK`) and delimiter automatically - Normalizes rows to a consistent column count - Exports normalized CSV, XLSX, or both ## Inputs - **CSV/TSV Source File** (file) - **Source Encoding** (select) - **Output Mode** (select) - **Output Delimiter** (select) - **Sheet Name** (text): Data - **Trim Whitespace** (checkbox) - **Treat First Row as Header** (checkbox) ## When to use - When you encounter 'mojibake' or garbled text caused by incorrect file encoding like GBK or UTF-8. - When your CSV file has inconsistent column counts that break standard spreadsheet imports. - When you need to quickly convert raw, non-standard delimited data into a clean XLSX or standardized CSV format. ## How it works - Upload your source CSV or TSV file to the tool. - The system automatically detects the character encoding and delimiter, or you can manually override these settings. - Configure your output preferences, such as trimming whitespace or defining a custom sheet name. - Download your normalized data as a clean CSV, an XLSX file, or a ZIP package containing both. ## Use cases - Fixing legacy data exports that use non-standard delimiters or outdated character encodings. - Preparing raw system logs or database dumps for analysis in Excel. - Standardizing inconsistent CSV files from multiple sources into a uniform format for team collaboration. ## Frequently asked questions ### Does this tool support GBK encoding? Yes, the tool supports automatic detection of GBK and UTF-8 encodings to ensure your data displays correctly. ### Can I convert a CSV directly to XLSX? Yes, you can select 'XLSX Only' in the output mode to convert your CSV file into a standard Excel workbook. ### What happens if my CSV rows have different column counts? The tool normalizes the data structure to ensure every row aligns with the header, preventing import errors in Excel. ### Can I change the delimiter in the output file? Yes, you can choose from common delimiters like commas, semicolons, tabs, or pipes for your output CSV. ### Is there a limit to the file size I can upload? The tool supports files up to 100MB for processing. ## Related tools - [XLSX CSV Batch Converter](https://elysiatools.com/en/tools/xlsx-csv-batch-converter): Batch convert CSV/TSV to XLSX or convert XLSX back to CSV/TSV with delimiter and encoding handling - [XLSX Sheet to CSV Pack](https://elysiatools.com/en/tools/xlsx-sheet-to-csv-pack): Export each Excel worksheet as an individual CSV file and include a manifest with schema/statistics - [Excel to CSV Converter](https://elysiatools.com/en/tools/excel-to-csv): Convert Excel file to CSV format, extracting data from the first worksheet - [Text to Excel Converter](https://elysiatools.com/en/tools/text-to-excel): Convert various text formats to Excel with customizable parsing and formatting options - [Barcode Batch Generator](https://elysiatools.com/en/tools/barcode-batch-generator): Batch generate Code 128, EAN-13, UPC-A, ITF-14, QR Code, and Data Matrix outputs from CSV or multiline text - [CSV File Merger](https://elysiatools.com/en/tools/csv-merger): Merge multiple CSV files into a single file with options for header handling and deduplication - [Time Series Forecast & Seasonality Analyzer](https://elysiatools.com/en/tools/time-series-forecast-seasonality-analyzer): Forecast future periods from CSV or JSON time-series data and inspect trend, seasonal, and residual decomposition in one report - [XLSX Multi Sheet Splitter](https://elysiatools.com/en/tools/xlsx-multi-sheet-splitter): Split a multi-sheet workbook into independent files by sheet name, with ZIP output ## Samples - [XLSX Samples](https://elysiatools.com/en/samples/xlsx-samples): Sample XLSX spreadsheets for worksheet parsing and data extraction testing - [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 - [XLS Samples](https://elysiatools.com/en/samples/xls-samples): Sample legacy Excel (XLS) files for binary spreadsheet parsing and import tests - [CSV Samples](https://elysiatools.com/en/samples/csv-samples): Sample CSV files with various data types, sizes, and complexity levels ## Related content - [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. - [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. - [CSV Cleanup, Reshaping, and Delivery Workflow](https://elysiatools.com/en/hubs/csv-utility): Inspect CSV structure, keep the right columns, reshape rows, compare outputs, and split final files for dependable imports or reporting.