FileConvert

Data converter

NDJSON to CSV Converter

Turn NDJSON files into CSV without installing anything. The target format on this page is already set to CSV, so a single file or a whole folder is one press of Convert away.

  • Whole batches at once
  • Quality you control
  • Removed once it is done

NDJSON CSV

or drop files here

Files travel over TLS and are deleted from the server as soon as the conversion finishes.

NDJSON and CSV: what actually changes

NDJSON is one JSON object per line, so a huge file can be streamed rather than parsed whole. CSV is comma-separated plain text — one table, no types, readable by everything.

Records are read out of the NDJSON with their structure intact and written as CSV, so this is a real parse rather than a text substitution — quoting, escaping and character encoding are all handled for you. The CSV you get back keeps the header row and every value as text, and gives up formulas, formatting, multiple sheets and column types. The thing to check before you rely on the output is typing: dates, leading zeros and very large integers are where formats disagree.

How it goes3 steps

  1. Add your NDJSON files
    Drop them onto the box above or click Select File. Add as many .ndjson files as you like — the whole batch converts in one go, and duplicates are ignored.
  2. Confirm CSV as the output
    CSV is already selected as the target format on this page. Check the delimiter and encoding options if your data is unusual.
  3. Download your CSV
    Hit Convert and grab the finished CSV files individually or as a single ZIP. Everything is deleted from the server once you have them.

Format facts

What each side of this conversion is good at, so you know what you are trading away.

Source .ndjson

NDJSON

One JSON object per line, so a huge file can be streamed rather than parsed whole.

Compression
Lossless
Transparency
Not supported
Keeps
Record structure while staying line-addressable
Gives up
The enclosing array — each line stands alone

Result .csv

CSV

Comma-separated plain text — one table, no types, readable by everything.

Compression
Lossy
Transparency
Not supported
Keeps
The header row and every value as text
Gives up
Formulas, formatting, multiple sheets and column types

Send NDJSON somewhere else

Every other format a NDJSON file can leave as.

From .ndjson 6 targets

tsv json parquet yaml xml toml

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