Format guide
What is NDJSON?
Newline-Delimited JSON is a newline-delimited json used as readable text configuration or markup, created by Various. Streaming JSON records one per line. Keep secrets local — Format Convertly converts in the browser without uploading.
NDJSON format specifications
- Full name
- Newline-Delimited JSON
- Kind
- configuration / plain text
- File extension
- .ndjson
- MIME type
- application/x-ndjson
- Developer / standard
- Various
- Compression
- None (plain text)
- Quality model
- Lossless / not lossy
- Container
- No / single bitstream typical
- Common codecs
- —
- Technical sources
- —
- Transparency
- Not supported
- Animation
- No (still / non-animated typical use)
- Typical size
- Tiny
- Browser support
- Download/edit as text
- Compatibility
- Text editors and relevant runtimes
NDJSON compression & quality
NDJSON is text. Compress with ZIP/GZ only for transport.
Quality: Exact text
Typical size: Tiny
Transparency & animation
Not applicable.
Not applicable.
NDJSON metadata
Usually none beyond encoding.
Best use cases for NDJSON
- Streaming JSON records one per line
- Developer workflows
- Config and docs pipelines
When to avoid NDJSON
- Uploading secrets to untrusted converters
- Treating as a rich document format
Advantages
- Readable
- Scriptable
- Easy to convert to other text forms
Disadvantages
- Easy to leak secrets
- Dialect/tool specific
- Not for non-technical publishing
Compatibility
Text editors and relevant runtimes
Browsers: Download/edit as text
Software support
- VS Code
- Server tooling
- Format Convertly
Device support
- Developer and ops machines
How to open NDJSON
Open with any text editor.
How to convert NDJSON
Convert with Format Convertly’s browser text/data tools — keep secrets on-device.
Popular NDJSON conversions
Related formats
NDJSON tools
Tools extend the format graph beyond one-off conversion — compression, metadata, and utilities for real workflows.
NDJSON FAQ
What is NDJSON?
Newline-Delimited JSON. Streaming JSON records one per line.
Are my NDJSON files uploaded on Format Convertly?
No. NDJSON conversion runs in your browser. Files are not sent to Format Convertly servers for processing.