Filter NDJSON Files Online
Filter rows in NDJSON files by column value, directly in your browser. Your data stays on your device.
Drop your .ndjson file here
or click to browse — max 50 MB
About this tool
Filter rows from NDJSON files using point-and-click conditions — no SQL required. Choose a column, pick an operator, enter a value, and download the matching rows. Everything runs in your browser.
Frequently Asked Questions
What conditions can I use to filter a NDJSON file?
You can filter by any column using equals, not equals, contains, starts with, ends with, is empty, or is not empty. Numeric columns also support greater than and less than. Multiple conditions are combined with AND.
Can I filter a NDJSON file on more than one column at a time?
Yes. Add multiple conditions and they are all applied together. Every row in the output satisfies all conditions.
Does filtering modify the original NDJSON file?
No. A new file is created containing only the matching rows. Your original file is untouched.
Is my data private?
Yes — completely. Your file is never uploaded to any server. Everything runs locally in your browser using WebAssembly — processing happens entirely inside your tab. Once you close the tab, nothing is retained.
What is the maximum file size?
The free limit is 50 MB. For larger files, performance depends on your device's available memory — most modern machines handle 500 MB to 1 GB comfortably.
Related Tools
Convert CSV to NDJSON Online
Convert CSV files to NDJSON format directly in your browser. No upload required — your data never leaves your device.
Convert Parquet to NDJSON Online
Convert Parquet files to NDJSON format directly in your browser. No upload required — your data never leaves your device.
Convert JSON to NDJSON Online
Convert JSON files to NDJSON format directly in your browser. No upload required — your data never leaves your device.
Convert NDJSON to CSV Online
Convert NDJSON files to CSV format directly in your browser. No upload required — your data never leaves your device.
Convert NDJSON to Parquet Online
Convert NDJSON files to Parquet format directly in your browser. No upload required — your data never leaves your device.