Limited jq-style JSON Path Selector
Applies supported property and array-index paths to JSON, with simple `|` chaining. This bounded selector does not implement the jq filter language.
About this limited jq-style json path selector
Applies supported property and array-index paths to JSON, with simple `|` chaining. This bounded selector does not implement the jq filter language Transforms and validates developer data structures locally, preventing confidential payload exposure during data wrangling.
Syntax parsing & data transformation logic
Strictly parses JSON, then evaluates supported dotted property and array-index paths. A `|` runs each trimmed path over the previous result; jq functions, variables, arithmetic and object construction are unavailable.
Worked conversion & output example
Scenario: Select a nested JSON member with this tool's limited dotted-path syntax.
Sample input:
Processing: Strictly parse the first field as JSON, then traverse the user and name keys from the second field. This is not the full jq filter language.
Illustrative output:
Syntax constraints & input size limits
Only a bounded path-selector subset is supported. jq functions, variables, arithmetic, object construction, streaming and general filters are unavailable; invalid JSON or a missing path raises an error.
Data conversions and formatting in Limited jq-style JSON Path Selector reflect standard structured syntax. Verify parsed outputs against your target runtime before deployment.
Local client execution boundary
Data parsing and transformations in Limited jq-style JSON Path Selector execute in the local browser tab without remote data transmission.
Data format specifications & language standards
Data interchange formats and language grammar specifications:
- Standard Browser Web API / Algorithm Implementation (No single external RFC/ISO standard)
Limited jq-style JSON Path Selector verification · Audit standards
How to use it
- Paste valid JSON and enter a supported dotted property or array-index path.
- Optionally join supported paths with `|`; evaluate each path against the previous result.
- Read a JSON-serialized result, or one JSON value per line when an array path ends in `[]`.
Frequently asked questions
How does jq Simulator evaluate an expression?+
It parses strict interchange JSON, returns the whole value for an empty expression or `.`, and otherwise passes dotted path segments to evaluatePath. A `|` expression runs each trimmed part from left to right over the preceding result.
What does the dotted selector return?+
For `{"user":{"name":"Ada"}}` with `.user.name`, the page returns JSON string `"Ada"`. It selects the nested member; that result does not represent the full jq language.
How are array results presented?+
When the evaluated result is an array and the expression ends in `[]`, it serializes each member as JSON on its own line. Other successful results are serialized once; malformed JSON or a nonmatching path errors.
What jq features are outside scope?+
This is a bounded selector simulator. It does not promise jq filters, variables, functions, arithmetic, object construction, streaming, module loading, shell integration, or compatibility with every jq expression.