Data format

NDJSON Sample Files

NDJSON (.ndjson) is newline-delimited JSON optimized for streaming pipelines. Use sample NDJSON files to validate event ingestion, line-level error handling, and batch processing behavior.

9 files All to 5MB SHA256 verified Manifest included

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Quick facts

CategoryData

Total Files9

Extension.ndjson

MIMEapplication/octet-stream

ManifestJSON

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Starter file

ndjson_api_activity_stream_sample.ndjson · 313 B

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Webhook Delivery NDJSON

Line-delimited delivery stream for webhook replay and ingestion testing.

ndjson_webhook_delivery_stream_sample.ndjson · 356 B

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API Activity NDJSON

Line-delimited API activity stream for replay and analytics ingestion.

ndjson_api_activity_stream_sample.ndjson · 313 B

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Malformed NDJSON Stream

Broken line-delimited event stream for parser failure tests.

ndjson_malformed_event_stream_sample.ndjson · 230 B

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All (9) 50KB (4) 200KB (1) 500KB (1) 1MB (1) 2MB (1) 5MB (1)

50KB NDJSON 1MB NDJSON

Filename	Size	MIME	Download
ndjson_api_activity_stream_sample.ndjson .ndjson Realistic Starter `SHA256 27962b74e241...`	313 B	`application/octet-stream`	Download
ndjson_malformed_event_stream_sample.ndjson .ndjson Edge `SHA256 b9a4f27ae434...`	230 B	`application/octet-stream`	Download
ndjson_sample_file_1MB.ndjson .ndjson `SHA256 e3d7a3a53403...`	1.0 MB	`application/octet-stream`	Download
ndjson_sample_file_200KB.ndjson .ndjson `SHA256 39bab07e1729...`	200.0 KB	`application/octet-stream`	Download
ndjson_sample_file_2MB.ndjson .ndjson `SHA256 a9408f51eb49...`	2.0 MB	`application/octet-stream`	Download
ndjson_sample_file_500KB.ndjson .ndjson `SHA256 896c3c8d042a...`	500.0 KB	`application/octet-stream`	Download
ndjson_sample_file_50KB.ndjson .ndjson `SHA256 03528f9db518...`	50.0 KB	`application/octet-stream`	Download
ndjson_sample_file_5MB.ndjson .ndjson `SHA256 e673907f12b7...`	5.0 MB	`application/octet-stream`	Download
ndjson_webhook_delivery_stream_sample.ndjson .ndjson Realistic `SHA256 734480223447...`	356 B	`application/octet-stream`	Download

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Best Format for Realtime Event Streams How to Convert NDJSON to SQL

FAQ and reference

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Checksum Verification

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shasum -a 256 your_file_name_here
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Where is the machine-readable manifest?

Use the manifest when you need stable names, SHA256 values, and URLs for automation.

Manifest

Validation Methodology

Validate extension and MIME detection before processing.
Benchmark performance with small and larger files.
Test malformed-input handling and error messaging.

Fixture Matrix

Use the curated NDJSON matrix to choose the right clean, edge-case, and broken fixtures for this format.

Open Matrix

Workflow Packs

API Replay Fixture Pack Webhook Debugging Fixture Pack

Edge-Case Fixtures

Malformed NDJSON Stream

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