Free browser-based data tool

JSON Array Frequency Analyzer

Analyze value frequency and distribution across JSON arrays. Everything stays in your browser.

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

Select fields from root or nested object arrays
Review unique counts and percentage distributions
Find top and least-common values without modifying data

Upload JSON

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

Drop a JSON file here

or use the file browser

Paste and validate JSON

UtilityDock discovers selectable fields across root and nested object arrays.

JSON document

Paste JSON or upload a file to begin.

What JSON frequency analysis is

A count and percentage for every observed field value

Frequency analysis groups equal values within selected JSON fields, counts each occurrence, and calculates its share of present values. UtilityDock keeps JSON types distinct and produces stable ordering without sending data anywhere.

Data quality workflows

Identify duplicates, dominant categories, and rare values

Inspect identifiers, statuses, regions, labels, or flags to see whether one value dominates, duplicates are common, or unexpected outliers deserve closer review.

API inspection

Understand response distributions before integration

Analyze saved API resources to count status values, feature flags, resource types, or error codes. Missing properties and explicit nulls remain separate so response behavior is clear.

Analytics preparation

Profile dimensions before building a report

Review categorical distributions before importing data into a spreadsheet, notebook, or analytics pipeline. The JSON report can be copied or downloaded for later comparison.

Examples

Turn repeated values into useful distribution signals

Field	Question answered
`$.customers[*].region`	Which region appears most often?
`$.events[*].status`	What percentage of events succeeded?
`$.items[*].category`	Which categories are rare or dominant?

Inspection utilities

Continue with related UtilityDock inspection workflows

JSON Type ProfilerMeasure value types and normalized path distributions.JSON Null & Missing InspectorMeasure completeness across object arrays.JSON Pointer ExplorerNavigate a document and copy RFC 6901 paths.JSON Diff & CompareInspect structural and value differences.JSON Schema ValidatorReview validation errors against a draft-07 schema.JSON Unique Value ExtractorExport distinct values from selected fields.

FAQ

Questions about JSON value frequency

Does UtilityDock upload or store my JSON?

No. Your files never leave your computer. Validation, field discovery, frequency analysis, preview, copying, and report creation all happen locally inside your browser.

How are percentages calculated?

Each value count is divided by the number of present values for that field. Missing properties are reported separately and excluded from the distribution denominator.

Does null count as a value?

Yes. Explicit JSON null is a distinct value. A missing property is not a value and is tracked separately.

How are ties ordered?

Frequency tables sort by count from highest to lowest. Values with equal counts retain deterministic first-seen order.

Can this tool change or recommend changes to my data?

No. Version 1 is read-only and provides no charts, automatic recommendations, modification, or APIs.