#229 · CSV & Delimited Files Tool

CSV Dialect Report

Inspect a delimited text file and report its likely delimiter, quote behavior, line endings, row widths, and encoding signals.

Office File Tool

Choose exactly one file
row
rows
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How to use this office tool

  1. Select the required spreadsheet file.
  2. Choose the worksheet and adjust the available options.
  3. Select Analyze dialect and inspect the bounded preview.
  4. Download the newly generated result file.

What this tool does

Inspect a delimited text file and report its likely delimiter, quote behavior, line endings, row widths, and encoding signals.

Candidate delimiters are scored across sampled lines, then the chosen dialect is parsed to measure consistent and irregular row widths.

Files remain on this device. Keep a backup of the source file and review generated reports before acting on them.

Supported formats

Designed for CSV and TSV text files. Encoding detection distinguishes UTF-8 BOM, valid UTF-8, and uncertain legacy byte sequences; it cannot identify every legacy code page.

FormatSupport
XLSX / XLSBrowser parsing with SheetJS CE
CSV / TSVDelimited table input
OutputNew XLSX, CSV, JSON, or YAML report

Tips for better results

  • Use a clear header row and unique column names.
  • Keep identifiers such as postal codes stored as text.
  • Check dates, large integers, and formula results in the preview.
  • For sensitive workbooks, close the tab after downloading the result.

FAQ

Does the csv dialect report upload my file?

No. The selected file is read and processed locally by JavaScript in your browser. This page does not send its contents to a processing server.

What happens to formulas and formatting in this csv dialect report?

Designed for CSV and TSV text files. Encoding detection distinguishes UTF-8 BOM, valid UTF-8, and uncertain legacy byte sequences; it cannot identify every legacy code page.

How large a file can I process with the csv dialect report?

The page enforces a 50 MB per-file and 1,000,000-cell safety limit. Practical capacity also depends on your device memory and browser.

Can I review the csv dialect report result before downloading?

Yes. A bounded preview and summary statistics appear after processing. The full newly generated result is available from the Download button.

Why might the csv dialect report result differ from Excel?

Browser libraries read stored workbook data but do not reproduce the complete Microsoft Excel calculation and rendering engine, VBA, Power Query, or every advanced workbook object.

Processing notes

AreaBehavior
PrivacyLocal browser processing
PreviewLimited rows and columns
SafetyCSV formula-prefix protection option

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