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Find files, editable templates and browser test targets by what you need to make or test. The directory below is cut by format; the two collections under it cut the same library by subject and by workflow.

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CSV Edge: Pipe Delimited

Tiny SAMPLE CSV (pipe-delimited) exercising delimiter/quoting edge behaviour.

File: CSV · CSV
Use case: CSV parsingError handling+1· Conversion set

CSV Edge: Quoted Embedded Comma

Tiny SAMPLE CSV (quoted-embedded-comma) exercising delimiter/quoting edge behaviour.

File: CSV · CSV
Use case: CSV parsingError handling+1· Conversion set

CSV Edge: Quoted Embedded Newline

Tiny SAMPLE CSV (quoted-embedded-newline) exercising delimiter/quoting edge behaviour.

File: CSV · CSV
Use case: CSV parsingError handling+1· Conversion set

CSV Edge: Semicolon Eu

Tiny SAMPLE CSV (semicolon-eu) exercising delimiter/quoting edge behaviour.

File: CSV · CSV
Use case: CSV parsingError handling+1· Conversion set

CSV Edge: Single Column

Tiny SAMPLE CSV (single-column) exercising delimiter/quoting edge behaviour.

File: CSV · CSV
Use case: CSV parsingError handling+1· Conversion set

CSV Edge: Trailing Comma

Tiny SAMPLE CSV (trailing-comma) exercising delimiter/quoting edge behaviour.

File: CSV · CSV
Use case: CSV parsingError handling+1· Conversion set

CSV Extension: Tab Delimited Content

A .csv file whose content is tab-delimited. Tests whether importers sniff delimiters or trust the extension.

File: CSV · Encodings · 2 rows
Use case: CSV parsingError handling

CSV Formula-Injection Safe Sample

A sanitization-test CSV with one equals-prefixed cell clearly labelled sample-only. Use it to verify importers neutralize spreadsheet formulas, not an attack list.

File: CSV · Edge Cases · 2 rows
Use case: CSV parsingError handling

CSV with Duplicate Headers

A small CSV whose header row repeats the column name id: a common importer failure mode.

File: CSV · Edge Cases · 2 rows
Use case: CSV parsingError handling

CSV with Leading-Zero Identifiers

SKU identifiers that start with zeros. Spreadsheet tools often coerce these to numbers and drop the zeros. Keep them as text.

File: CSV · Edge Cases · 3 rows
Use case: CSV parsingData import

CSV with Mixed Null Representations

A CSV where missing values are written seven different ways (empty string, NULL, NA, N/A, null, None, and a dash) across text and numeric columns. A fixture for testing null-detection and coercion in CSV importers.

File: CSV · Edge Cases · 8 rows
Use case: CSV parsingError handling+1

CSV with Mixed Timestamp Formats

A CSV listing timestamps in eleven formats: ISO 8601 with Z and numeric offsets, millisecond precision, naive local, date-only, Unix epoch in seconds and milliseconds, US AM/PM, and RFC 1123. A fixture for testing date parsing and timezone normalisation.

File: CSV · Edge Cases · 11 rows
Use case: CSV parsingError handling+1

CSV with Mixed-Type Columns

A CSV whose 'value' column mixes integers, floats, scientific notation, dates, hex, thousands separators, and whitespace, and whose 'flag' column mixes a dozen boolean spellings. A torture test for type inference and schema detection.

File: CSV · Edge Cases · 12 rows
Use case: CSV parsingError handling+1

CSV: Hash Comment Lines

A CSV with # comment lines mixed among data: common in scientific exports; tests comment skipping.

File: CSV · Encodings · 2 rows
Use case: CSV parsingData import

CSV: ISO-8859-1 (Latin-1)

A Latin-1 CSV with high-bit accented characters, for legacy 8-bit charset detection.

File: CSV · Encodings · 2 rows
Use case: CSV parsingEncoding detection

CSV: Mixed CRLF and LF

A CSV that mixes CRLF and LF row endings within one file: newline normalisation fixture.

File: CSV · Encodings · 3 rows
Use case: CSV parsingEncoding detection

CSV: Pipe Delimiter

A pipe-delimited (| ) tabular file, for testing non-comma delimiter autodetection.

File: CSV · Encodings · 2 rows
Use case: CSV parsingData import

CSV: Quoted Embedded Newlines

A CSV with a quoted field that contains an embedded newline: a classic RFC 4180 parser stress case.

File: CSV · Encodings · 2 rows
Use case: CSV parsingError handling

CSV: Ragged Column Counts

Rows with differing field counts, for testing how importers pad, truncate, or error on ragged CSV.

File: CSV · Encodings · 3 rows
Use case: CSV parsingError handling

CSV: Semicolon Delimiter (EU)

European-style CSV using semicolons as delimiters and comma decimals: a common locale edge case.

File: CSV · Encodings · 2 rows
Use case: CSV parsingData import

CSV: Shift-JIS Japanese

A Shift-JIS encoded Japanese CSV, for CJK charset detection and Shift-JIS→UTF-8 conversion in importers.

File: CSV · Encodings · 2 rows
Use case: CSV parsingEncoding detection+1

CSV: Single Column

A one-column CSV of email addresses: edge case for delimiter sniffers that expect commas in every row.

File: CSV · Encodings · 2 rows
Use case: CSV parsingData import

CSV: UTF-16 BE with BOM

UTF-16 big-endian CSV with BOM, for byte-order detection in tabular importers.

File: CSV · Encodings · 3 rows
Use case: CSV parsingEncoding detection

CSV: UTF-16 LE with BOM

The same three data rows as UTF-16 little-endian with a BOM, wide-character CSV decoding fixture.

File: CSV · Encodings · 3 rows
Use case: CSV parsingEncoding detection