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API Problem+JSON — Unprocessable Entity (422)

RFC 7807 SAMPLE problem document for HTTP 422 (Unprocessable Entity) client tests.

File: JSON · Api
Use case: JSON parsingError handling+1· Conversion set

API Problem+JSON — Unsupported Media Type (415)

RFC 7807 SAMPLE problem document for HTTP 415 (Unsupported Media Type) client tests.

File: JSON · Api
Use case: JSON parsingError handling+1· Conversion set

Api Rate Limit Meta

Rate-limit header values captured as JSON for middleware testing.

File: JSON · Api
Use case: API testingJSON parsing

API Response — Users Page 1 (JSON)

Page 1 of a paginated JSON API response (users), with page metadata and a `hasMore` flag. Paired with page 2 for testing pagination and infinite-scroll logic.

File: JSON · Api
Use case: API testingConversion testing· Conversion set

API Response — Users Page 2 (JSON)

Page 2 (the final page) of a paginated JSON API response. Paired with page 1 for testing pagination, `hasMore` handling, and list merging.

File: JSON · Api
Use case: API testingConversion testing· Conversion set

Api Total Count Mismatch

Paginated response where total count disagrees with items length — tests inconsistency detection.

File: JSON · Api
Use case: API testingJSON parsing

App Config (INI)

Sample INI config file for legacy config parser tests.

File: INI · Config
Use case: Config testingConversion testing

App Config (TOML)

Sample TOML application config for TOML parser tests.

File: TOML · Config
Use case: Config testingConversion testing

App Settings (JSON)

JSON application settings for config-merge and validation tests.

File: JSON · Config
Use case: Config testingConversion testing+1

Atom Feed

A well-formed Atom feed with multiple entries — for testing feed readers and parsers.

File: ATOM · Feeds · UTF-8
Use case: Feed parsing

Avro — Row Binary + Schema

The same records as Apache Avro — a compact row-based binary format that embeds its own schema, widely used in Kafka pipelines. For testing Avro decoders and schema evolution.

File: AVRO · Binary · 5 rows
Use case: Conversion testingData engineering· Conversion set

Avro Schema Evolution - Backward-Compatible

The compatible Avro record schema for reader/writer compatibility tests. Backward compatible for old records: nullable email is added with a null default.

File: JSON · Schema · 3 fields
Use case: Schema / OpenAPI testingSchema validation+2· Conversion set

Avro Schema Evolution - Baseline

The baseline Avro record schema for reader/writer compatibility tests. Reference writer schema: id and name are strings.

File: JSON · Schema · 2 fields
Use case: Schema / OpenAPI testingSchema validation+2· Conversion set

Avro Schema Evolution - Breaking

The breaking Avro record schema for reader/writer compatibility tests. Breaking relative to baseline: id changes to long and tenantId has no default.

File: JSON · Schema · 3 fields
Use case: Schema / OpenAPI testingSchema validation+2· Conversion set

AWS Credentials Shape SAMPLE (INI)

AWS credentials file shape with obviously fake keys — for credential scanner and parser tests.

File: INI · Config
Use case: Config testingConversion testing

Bank Transactions (CSV, 60 rows)

A bank-transaction statement — 60 debits and credits across three accounts (masked numbers) with running balances, categories, and merchants. Synthetic data for testing statement parsers, categorisation, and reconciliation.

File: CSV · Banking · 60 rows
Use case: Data importConversion testing· Conversion set

Bank Transactions (JSON, 60 records)

The bank transactions as a JSON array — the format twin of the CSV, for import and reconciliation testing.

File: JSON · Banking · 60 records
Use case: Data importConversion testing· Conversion set

BibTeX Bibliography (.bib)

A BibTeX bibliography with three real citations (Lovelace, Knuth, Shannon) across article, book, and inproceedings types — for testing BibTeX parsers, reference managers, and citation converters.

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

BSON — Binary JSON (MongoDB)

The records as BSON — the binary-JSON encoding MongoDB stores documents in. For testing BSON decoders and JSON↔BSON conversion.

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

Calendar Parsing - Intentionally Corrupt Missing END:VEVENT (ICS)

An intentionally corrupt iCalendar file whose VEVENT is never closed, for testing fatal component-nesting errors without using a large or hostile payload.

File: ICS · Calendar Contacts · UTF-8
Use case: Calendar parsingConversion testing· Conversion set

Calendar Parsing - Recoverable LF Line Endings (ICS)

A complete iCalendar structure using LF-only line endings, a common recoverable export defect for tolerant parser tests.

File: ICS · Calendar Contacts · UTF-8
Use case: Calendar parsingConversion testing· Conversion set

Calendar Parsing - Valid Folded UTF-8 Event (ICS)

A standards-conforming event with a folded content line and UTF-8 text for baseline parser and line-unfolding tests.

File: ICS · Calendar Contacts · UTF-8
Use case: Calendar parsingConversion testing· Conversion set

Calendar Recurrence - EXDATE plus RDATE (ICS)

A recurrence set with both an exclusion and an explicit addition, useful for catching expansion engines that apply only one modifier.

File: ICS · Calendar Contacts · UTF-8
Use case: Calendar parsingConversion testing· Conversion set

Calendar Recurrence - Five Weekly Occurrences (ICS)

A weekly five-occurrence series that provides the recurrence baseline before exclusions or additions are applied.

File: ICS · Calendar Contacts · UTF-8
Use case: Calendar parsingConversion testing· Conversion set