How it works
Add your JSON Lines / NDJSON file. MimiFile checks the format, converts it to JSON, and provides a temporary download when the result is ready.
Convert JSONL / NDJSON to a standard JSON array when a viewer, API, script or application expects one JSON document instead of one record per line.
JSONL → JSON
Drag and drop, paste a file, or browse your device.
Files are temporary and deleted automatically.
Limits: 50 MB per file · 128 MB total per batch.
Add your JSON Lines / NDJSON file. MimiFile checks the format, converts it to JSON, and provides a temporary download when the result is ready.
JSONL is convenient for streaming because each record is independent. The converted JSON output is one array containing the records, so the whole document has a single enclosing structure.
Current source limit : 50 MB per file. Up to 10 files can be submitted in a batch, subject to the global batch ceiling.
JSONL stores separate JSON records on individual lines. MimiFile parses those records and writes one JSON array containing the converted row objects.
An array is often easier to open in JSON viewers, pass to APIs that expect a single JSON value, inspect with ordinary JSON tooling or load with a standard JSON parser.
A single JSON array is less append-friendly than JSONL because the document has an enclosing structure. Keep the JSONL source when streaming, incremental writes or line-oriented processing matters.
When a tabular destination cannot represent lists or objects directly, nested values are serialized as JSON text where supported instead of being silently discarded.
Nulls and timestamps are preserved when the destination supports them. Binary values can be represented as Base64 text in text-based or spreadsheet outputs.
Check column types, null values, timestamps and nested fields before using the converted file in a production data pipeline.