Each line becomes one record
The file opens as one list with one item per line, also when the format is called NDJSON. The file size beside the document's name says JSONL.
jsonloupe
JSONL viewer
Open a JSON Lines file, one record per line, and read it as a list. Log extracts, Kafka dumps and data exports open as records you can scroll, search and filter.
A text editor shows each record as one long line. Here every line becomes an item you can expand on its own.
0 bytes uploaded · no account · free
Paste JSON Lines
nothing leaves this tab
for big files, “open a file instead” reads the file straight from your disk — .jsonl and .json
⌃↵ to open
What happens to your JSONL
Big logs stay responsive
The tree draws only the rows on screen, and a long list opens in pages of 10,000 records. Reading, searching and filtering run in the background.
Long IDs keep every digit
Trace IDs and order numbers longer than 15 digits can be rounded by other viewers. Here they stay exactly as they are in the file.
Search every record at once
Search by text or pattern across all records, and filter the tree down to the matches. Each closed record shows its size in bytes, so the heavy ones are easy to find.
Count and group records
Short queries run in this tab, for example the errors in a log grouped by service.
$[?(@.level == 'error')] | group(@.service)
Why nothing is uploaded
The viewer runs inside this browser tab. Your file is read here and nowhere else. There is no server to send your file to, which is why it keeps working with your wifi off. Nothing is logged, counted, or kept anywhere but your own computer.
bytes uploaded0
largest file200 MB
works with wifi offyes
pricefree · MIT