#009 · CSV & Delimited Files Tool

CSV Viewer

Open CSV or TSV data safely in your browser, inspect a limited preview, and export a normalized copy.

Office File Tool

One CSV or TSV file
row
rows
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How to use this office tool

  1. Choose a CSV or TSV file and let the delimiter detector inspect it.
  2. Adjust preview rows and text-safety options.
  3. View the table, check counts, and download a normalized CSV copy if needed.

What this tool does

The viewer detects comma, tab, semicolon, or pipe delimiters, parses quoted fields, displays a bounded table, and creates a normalized CSV copy.

Delimited text → detected delimiter and quoted-field parsing → safe preview → normalized CSV Blob

The preview is intentionally limited to protect browser performance. The download includes the full parsed table.

Supported formats

Files are processed in memory on this device. Large or structurally complex workbooks may require desktop spreadsheet software.

InputSupport
XLSX / XLSNot accepted
CSV / TSVSupported with delimiter-aware parsing
Limits25 MB per file, bounded preview, up to 500,000 used cells

Tips for better results

  • Confirm delimiter detection with the preview.
  • Preserve original text encoding when non-English characters look wrong.
  • Keep formula-injection protection enabled for untrusted data.

FAQ

Which delimiters can the CSV viewer detect?

It tests comma, tab, semicolon, and pipe delimiters and chooses the candidate that produces the most consistent table.

Does the viewer handle quoted commas and line breaks?

Yes. Parsing follows CSV quote escaping, so delimiters and line breaks inside properly quoted fields remain within their field.

Why is the on-screen preview shorter than my file?

The preview is capped at the selected row count to keep large files responsive; the normalized download includes all parsed rows.

Can I view TSV files with this tool?

Yes. Tab-separated files are accepted and can be normalized into a comma-separated CSV download.

How does the tool reduce CSV formula-injection risk?

When Protect text values is enabled, exported cells beginning with =, +, -, or @ are prefixed with an apostrophe.

Processing details

Processing detailBehavior
Browser processingNo file upload
Preview5–100 rows
OutputNew generated file

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