UtilityDock

Free browser-based data tool

JSON Unique Value Extractor

Extract unique values from JSON arrays instantly.

Your files never leave your computer.All processing happens locally inside your browser.

  • Select one or more top-level or nested paths
  • Remove duplicates with deep JSON comparison
  • Sort and download JSON or newline-separated TXT
1

Upload JSON

Choose a .json file. It is read only by this browser tab.

Drop a JSON object array file here

or use the file browser

2

Paste and validate a JSON object array

UtilityDock detects selectable leaf paths without changing your source.

Paste JSON or upload a file to begin.

What JSON unique-value extraction is

Turn repeated field values into a distinct list

Unique-value extraction reads selected fields across an array of objects, compares the resulting JSON values, and retains one copy of each value. The default result follows stable first-seen order, with optional alphabetical or numeric sorting.

Data-cleaning workflows

Find the usable set behind repeated records

Collect distinct categories, identifiers, states, or nested labels while tracking how many duplicates were removed. Missing paths are omitted, while an explicit null is retained once.

Analytics preparation

Prepare dimensions and lookup values

Create a compact list for filters, validation rules, dashboard dimensions, spreadsheet checks, or downstream analysis. Export structured JSON or newline-separated text.

API inspection

Inspect response variety without writing a query

Review the distinct statuses, resource types, error codes, or nested response values present in a saved API payload. Deep comparison handles scalar and structured JSON values.

Examples

Select paths that answer a focused question

GoalFieldSort
List service regionsregionAlphabetical
Collect distinct scoresscoreNumeric
Inspect nested typesmetadata.typeFirst seen

Data Toolkit

Continue with related UtilityDock JSON workflows

JSON Array Value ExtractorExtract all selected values before deduplication.JSON Array Field SelectorKeep selected fields inside object records.JSON Array DeduplicatorRemove repeated objects from an array.JSON Array GrouperOrganize records by shared values.JSON Array FilterKeep records matching a field rule.JSON Array SorterSort complete object records.JSON FlattenerConvert nested values into paths.JSON to CSVExport object arrays as spreadsheet rows.

FAQ

Questions about extracting distinct JSON values

Does UtilityDock upload or store my JSON?

No. Your files never leave your computer. Validation, extraction, deduplication, sorting, copying, and downloads all happen locally inside your browser.

What JSON shape can I use?

Version 1 accepts a non-empty array of JSON objects at the document root.

Can I select more than one field?

Yes. The extractor scans every selected top-level or nested path in source-record order and returns one distinct value list.

How are missing and null values handled?

Missing paths are omitted. Explicit null values are retained and appear once in the unique result.

How are objects and arrays compared?

Values use deep JSON equality. Objects with the same properties are treated as equal even when their key order differs; array order remains significant.

What ordering does the result use?

First-seen order is the default. You can instead sort by a stable text representation or sort ascending when every unique value is numeric.

Does this tool provide value frequencies?

No. Version 1 reports only the total scanned, unique count, and aggregate duplicate count. Per-value frequency analysis is outside this utility.