CSV to XLSX Convert
Turn CSV, TSV, and plain-text tables into Excel XLSX workbooks in seconds. Delimiters, encodings, and column types are detected automatically — just drop your files in and download the results.
Why convert CSV to Excel with AnyDocFlow?
Auto-Detects Delimiters
Comma, tab, semicolon, or pipe-separated files are detected automatically, so your data lands in the right columns with zero setup.
Smart Encoding Detection
UTF-8 files read perfectly, and files exported as GBK or other legacy encodings are decoded automatically — no more garbled Chinese characters.
Column Type Inference
Numbers, dates, and text are recognized automatically as they are converted, so sorting, filtering, and formulas keep working in Excel.
Batch Convert & ZIP Download
Drop in as many files as you need at once and download every result individually, or grab them all as a single ZIP archive.
No Excel or Office Required
Everything runs in your browser with SheetJS. No Microsoft Excel, no plugins, and nothing to install.
100% Private & Free
Files never leave your device. Conversion is fully local, free, and works without an account or registration.
About CSV to Excel conversion
CSV (comma-separated values) is one of the most common ways to exchange tabular data between systems, but it stores only plain text — no formatting, formulas, or multiple sheets. AnyDocFlow's CSV to Excel converter reads your CSV, TSV, or plain-text tables and rebuilds them as real XLSX workbooks, the native format of Microsoft Excel. The delimiter is detected automatically, encoding is handled for you (including the GBK files common on Chinese Windows systems), and text that looks like a number or date becomes a true typed value in Excel. Converted files are generated entirely in your browser, so your data never touches a server and the whole process is fast and private.
How to convert CSV to Excel
Three simple steps — no account, no software, and no data leaving your device.
Add your files
Click the drop zone or drag CSV, TSV, or plain-text files into the page. You can select several files at once.
Wait for conversion
Each file is read locally, its delimiter and encoding detected, and rebuilt as an XLSX workbook — usually in under a second.
Download your XLSX
Download each converted file with one click, or press Download all to receive every result as a single ZIP archive.
Notes
There is no file size limit — everything is processed locally in your browser. The input delimiter and encoding are detected automatically; for best results make sure each file uses a consistent delimiter. Values that cannot be recognized as numbers or dates are kept as text, and only the first worksheet of any multi-sheet input is preserved (CSV has no sheets). Very large files can take a moment to parse, but they never leave your device.