JSONL Filter

updated 11 May 2026 · the no-code alternative to jq

100% client-side. No upload.

Filter

Combine with:

Drop a .jsonl file here, or

Input

Output

JSONL Filter — No-Code

Filter a JSONL file by writing conditions in a form, not in jq. Pick a key path, an operator, and a value; combine multiple conditions with AND or OR; invert the result to get the non-matching rows. Supports regex, ranges, and exists/missing checks. 100% in-browser.

— S., [email protected]

Operators

== / != — equality (auto-coerces numeric strings vs numbers).
> / >= / < / <= — numeric comparison (parses both sides).
contains / starts with / ends with — case-sensitive substring match.
regex — JavaScript regex match. Use without slashes; the i flag is supported via the trailing-slash form, e.g. /foo/i.
in — value is one of a comma-separated set (admin,owner,root).
exists / missing — the key path is or isn't present.
between — numeric range (10..20 inclusive).

Key path syntax

Dotted paths: id, user.email, meta.tags.0 for the first element of an array. Bracket notation also works: user["email address"] for keys with spaces.

Combining conditions

Choose AND to keep records where every condition is true; OR to keep records where at least one is true. For more complex logic ((A AND B) OR (C AND D)), filter twice and concatenate, or fall back to the Viewer's filter bar which supports nested expressions.

Tips & common pitfalls

Numbers vs strings. age == 30 matches both 30 and "30". If you need strict, use == "30" with quotes.
Missing keys never match equality. A record without email won't match email == "[email protected]" — use exists or missing if that's the question.
Regex anchors. Use ^ and $ to anchor; otherwise the regex matches anywhere in the value.

Example

Conditions: role == admin AND age >= 30.

Input:

{"id":1,"role":"admin","age":30}
{"id":2,"role":"user","age":25}
{"id":3,"role":"admin","age":42}
{"id":4,"role":"admin","age":18}

Output:

{"id":1,"role":"admin","age":30}
{"id":3,"role":"admin","age":42}