General Tool #316

CSV to Excel

Turn CSV, TSV and delimited text into a polished real Excel workbook — without letting Excel silently destroy IDs, leading zeros or long numbers.

Private by default

Your files are parsed and the .xlsx workbook is built in this browser. Nothing is uploaded by this tool.

Real .xlsxMulti-sheetValue-safeNo signup

XLSX

Drop CSV files here

Add one file, several CSVs, or paste data. Each source can become its own Excel sheet.

Workbook sheets

Add multiple files. Rename any worksheet before export.

PreviewPage 1

Rows—

Columns—

Encoding—

Delimiter—

Mode—

This source sheets—

Showing a preview only. The full dataset is exported.

Data protection

Choose whether Excel receives exact text or carefully inferred native types.

Preserve exactlyBest for IDs, codes and exports.Smart typesNumbers, booleans & ISO dates.

Exact mode writes source values as text, so 00123, 18-digit IDs and date-like codes stay unchanged.

Column types

Optional overrides for the active sheet.

Excel polish

First row is headers
Style the header row.Freeze header rowAdd Excel filtersAuto-fit columnsWrap long textAdd Workbook Info sheet

Workbook style

Safety check

Leading zeros0

Long IDs0

Formula-like0

Row issues0

Add a file to run the workbook safety check.

Build workbook

File name

Real XLSX · local conversion · no watermark

Building workbook…

Preparing sheets

Workbook ready

Your Excel file is ready.

The workbook has been built and validated as a ZIP-based XLSX package in this browser.

Worksheets—

Rows—

Cells—

File size—

CSV to Excel

Drop CSV files here

Your Excel file is ready.

Paste delimited data