What is a .NDJSON file?
NDJSON stores one JSON record per line, used for streaming data.
- Did you know
- Elasticsearch’s bulk API is one of the format’s best-known users, requiring every command and document to sit on its own newline-terminated line.
- The very same format is also called JSON Lines or JSONL, each line being one independent JSON value with no commas between them.
- Reading it line by line lets a program stream a multi-gigabyte file without loading the whole thing into memory at once.
- What Analyser reads
- Identify and read metadata from developer and data files: JWT tokens (header + claims + expiry), WebAssembly, Java class files, NumPy/Safetensors/GGUF model files, source maps, SQL dumps, Visual Studio/.NET projects, Terraform, Protobuf, GraphQL, SARIF, Python bytecode, and Apple property lists (XML + binary). Jupyter notebooks (IPYNB) and HAR captures now open in a full viewer - see Notebooks & data above.
- Depth of analysis
- .NDJSON is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .NDJSON file
- Drag a .NDJSON file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.