Yes. It supports a jq-like filter engine including .key, map(), select(), sort_by(), unique, and more.

JSON Linter, Formatter and Fixer

Fix, Validate and Transform Broken JSON Online

Paste any API response or log output. We validate, auto-repair common mistakes, and let you query with jq.

Fixes: trailing commas · single quotes · comments · missing commas

Popular JSON parse errors people search for

Unexpected token } in JSON at position 123
Expected ',' or ']' after array element in JSON at position 45
JSON.parse: expected property name or '}' at line 1 column 2
Invalid control character at line 3 column 12

Fix Invalid JSON

Get instant details for json parse error line column issues and repair JSON that breaks in logs, templates, or API responses.

Trailing commas: Remove trailing commas in objects and arrays (trailing comma json).

Single quotes: Convert single quotes JSON into valid double-quoted strings.

Unquoted keys: Add quotes around unquoted object keys for strict JSON.

Comments in JSON: Strip // and /* */ comments (comments in json).

Missing commas: Repair missing commas between properties or array items.

Missing brackets or quotes: Close unbalanced braces, brackets, or quotes.

All fixes run client-side in your browser. Nothing is uploaded.

jq Online Playground

Use this jq online playground to jq filter JSON, extract field from json payloads, and test quick transformations without leaving the browser.

. Return the input as-is.

.key Extract a field from JSON.

.[] Stream each item in an array.

.[0] Pick an element by index.

keys List all keys in an object.

length Count array length or string size.

map(.name) Map a field from each array item.

select(.age > 18) Filter array items by condition.

sort_by(.name) Sort array items by a field.

Click any snippet or "Try this" to prefill the editor and jq filter. Or open the dedicated jq Playground for a full-screen experience with the complete filter reference.

Common Tasks

Use the editor as a JSON validator or JSON checker, and to beautify JSON before reviews, commits, or debugging.

Pretty print: Format JSON with stable indentation for reviews and diffs.

Minify: Strip whitespace for smaller payloads and faster copy/paste.

Extract field: Use jq .key or .users[].name to extract field from json.

Filter array: Filter arrays with select(.age > 18) or similar predicates.

Sort keys: Inspect or sort keys with keys | sort for quick audits.

Remove duplicates: Use unique to remove duplicate values from arrays.

FAQ

Is it free?

Yes. The JSON linter, formatter, and jq playground are free to use.

Does it upload my data?

No. Everything runs locally in your browser, and your JSON never leaves your device.

Can it fix invalid JSON?

Yes. It can repair trailing commas, single quotes, comments in JSON, and missing commas or brackets.

Does it support jq?

Yes. It supports jq-like filters such as .key, map(), select(), sort_by(), unique, and more.

Why does my API return invalid JSON?

Common causes are debug comments, trailing commas, unquoted keys, or mixed quotes in logs or templates.

How to find JSON error line/column?

Run lint to see the exact parse error line and column, then fix or auto-repair the highlighted part.

JSON Linter, Formatter and Fixer - Fix, Validate and Transform Broken JSON Online

Apply jq Filter

Supported Operations:

Popular JSON parse errors people search for

Fix Invalid JSON

jq Online Playground

Common Tasks

FAQ