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Lab Measurements (CSV)

Synthetic lab readings (temperature, pressure, pH) with ISO timestamps for scientific ETL tests. CSV twin.

File: CSV · Lab · 16 rows
Use case: Data importCSV parsing· Conversion set

Lab Measurements (JSON)

Synthetic lab readings (temperature, pressure, pH) with ISO timestamps for scientific ETL tests. JSON twin.

File: JSON · Lab · 16 records
Use case: Data importJSON parsing· Conversion set

Large Transactions Dataset (CSV, 50k rows)

A 50,000-row transactions dataset — an in-repo 'large' fixture for testing streaming CSV parsers, import performance, and pagination. Deterministic (fixed seed).

File: CSV · Large · 50,000 rows
Use case: Data importPerformance testing+1

Latin-1 Encoded CSV

A CSV encoded in Latin-1 (ISO-8859-1) with accented names — for testing encoding detection and mis-decoding (it will look wrong if read as UTF-8).

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

Log Sample — App Json Structured

Tiny SAMPLE log excerpt (app-json-structured) for parser and alert-rule tests.

File: LOG · Logs
Use case: Log parsingError handling· Conversion set

Log Sample — Cloudflare Ray Sample

Tiny SAMPLE log excerpt (cloudflare-ray-sample) for parser and alert-rule tests.

File: LOG · Logs
Use case: Log parsingError handling· Conversion set

Log Sample — Multiline Stacktrace

Tiny SAMPLE log excerpt (multiline-stacktrace) for parser and alert-rule tests.

File: LOG · Logs
Use case: Log parsingError handling· Conversion set

Log Sample — Nginx Access Sample

Tiny SAMPLE log excerpt (nginx-access-sample) for parser and alert-rule tests.

File: LOG · Logs
Use case: Log parsingError handling· Conversion set

Log Sample — Nginx Error Sample

Tiny SAMPLE log excerpt (nginx-error-sample) for parser and alert-rule tests.

File: LOG · Logs
Use case: Log parsingError handling· Conversion set

Log Sample — Systemd Journal Excerpt

Tiny SAMPLE log excerpt (systemd-journal-excerpt) for parser and alert-rule tests.

File: LOG · Logs
Use case: Log parsingError handling· Conversion set

M3U Playlist

An extended M3U media playlist with #EXTINF duration and title directives over three track references (local and remote) — for testing playlist parsers and media players.

File: M3U · Feeds
Use case: Playlist & feed parsingEditor testing

Marketing Attribution (CSV)

Synthetic multi-touch attribution click rows with UTM fields — for marketing analytics importers. CSV twin.

File: CSV · Marketing · 10 rows
Use case: Data importCSV parsing· Conversion set

Marketing Attribution (JSON)

Synthetic multi-touch attribution click rows with UTM fields — for marketing analytics importers. JSON twin.

File: JSON · Marketing · 10 records
Use case: Data importJSON parsing· Conversion set

MDL Molfile — Water (.mol)

An MDL Molfile (V2000) of a water molecule with standard geometry — a counts line, atom block with 2D coordinates, and bond block — for testing cheminformatics parsers and MOL/SDF converters.

File: MOL · Scientific
Use case: Scientific dataEditor testing· Conversion set

Mermaid Flowchart (MMD)

A Mermaid flowchart of an order-fulfilment process as diagrams-as-code — for testing Mermaid rendering, diagram-to-image conversion, and Markdown pipelines that embed Mermaid.

File: MMD · Diagrams
Use case: Conversion testingEditor testing· Conversion set

MessagePack — Binary JSON

The records as MessagePack — a compact binary serialization that maps onto the JSON data model, common in caches and RPC. For testing MessagePack codecs and JSON↔MessagePack conversion.

File: MSGPACK · Binary · 5 rows
Use case: Conversion testingSerialization testing· Conversion set

Messy CSV (quoted commas, newlines, ragged rows)

A deliberately messy CSV: a quoted field with a comma, a quoted field with an embedded newline, escaped double-quotes, and ragged rows with too few and too many fields — the cases that break naïve parsers.

File: CSV · CSV · UTF-8
Use case: CSV parsingError handling

Multi-Value Contact - vCard 2.1

A fictional contact with repeated typed properties for testing importers that otherwise keep only the first value. This member uses vCard 2.1 syntax.

File: VCF · Calendar Contacts
Use case: Contact parsingConversion testing· Conversion set

Multi-Value Contact - vCard 3.0

A fictional contact with repeated typed properties for testing importers that otherwise keep only the first value. This member uses vCard 3.0 syntax.

File: VCF · Calendar Contacts
Use case: Contact parsingConversion testing· Conversion set

Multi-Value Contact - vCard 4.0

A fictional contact with repeated typed properties for testing importers that otherwise keep only the first value. This member uses vCard 4.0 syntax.

File: VCF · Calendar Contacts
Use case: Contact parsingConversion testing· Conversion set

MySQL SQL Dump

A MySQL-flavour SQL dump with backtick-quoted identifiers and engine options — for testing SQL importers.

File: SQL · Sql · 2 rows
Use case: SQL import

NDJSON Stream

A newline-delimited JSON (NDJSON) stream of event records — for testing streaming JSON parsers.

File: NDJSON · JSON · 4 records
Use case: JSON parsingData import

NetCDF Gridded Data (.nc)

A NetCDF-3 (classic) file holding a small CF-convention gridded temperature field over latitude, longitude, and time, with named dimensions and units — for testing NetCDF readers like netCDF4 and xarray.

File: NC · Scientific
Use case: Scientific data

Nginx Access Log

An nginx combined-format access log with several requests, including a 403 and a 404 — for testing log parsers.

File: LOG · Logs · 4 records
Use case: Log parsing