UtilityDock

Free browser-based data tool

JSON Array Field Renamer

Rename JSON fields across entire arrays instantly.

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

  • Map multiple top-level or nested field names
  • Block destination conflicts before output
  • Copy or download pretty or minified JSON
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 renameable fields at every object path.

Paste JSON or upload a file to begin.

What JSON field renaming is

Change property names without moving their values

Field renaming applies exact name mappings across every matching object in an array. Nested values remain in their existing parent, records stay ordered, and UtilityDock blocks any mapping that would overwrite a sibling field.

Preparing API payloads

Match the names expected by another system

Convert internal names such as account_status tostatus or rename nested response properties before using a payload in fixtures, imports, or integration testing.

Schema migration

Preview a naming change across saved records

Apply several exact mappings to representative data before a schema migration. Conflict detection exposes records where a destination name already exists, without overwriting either value.

Data normalization

Create consistent field names for downstream work

Normalize casing, terminology, and vendor-specific property names before analysis or conversion. Missing source paths are ignored, while every matching path receives the same name.

Examples

Map exact source paths to clearer names

Source pathNew nameUse
idrecordIdClarify a generic identifier
profile.emailcontactEmailNormalize contact data
account_statusstatusMatch API naming conventions

Data Toolkit

Continue with related UtilityDock JSON workflows

JSON Property CopierDuplicate values at new names or paths.JSON Array Field SelectorKeep only selected nested fields.JSON Array Field RemoverDelete fields you do not need.JSON Array FilterKeep records that match a field rule.JSON Array DeduplicatorRemove repeated objects from an array.JSON Array GrouperOrganize records by shared values.JSON FlattenerConvert nested values into paths.JSON Formatter & ValidatorValidate and format any JSON document.JSON to CSVExport object arrays as spreadsheet rows.

FAQ

Questions about renaming JSON fields

Does UtilityDock upload or store my JSON?

No. Your files never leave your computer. Validation, field discovery, renaming, conflict detection, preview, copying, and download creation 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 rename nested properties?

Yes. Enter a new terminal name for any detected object field path. The field stays inside its existing parent object.

Can I rename fields inside arrays?

Object properties inside indexed arrays can be renamed. Numeric array positions themselves are not field names and cannot be renamed.

What happens when a destination field already exists?

UtilityDock blocks the rename and identifies the affected array item. Existing values are never overwritten.

Does renaming change record or property order?

Records and arrays retain their order. Renamed object keys keep the original key position whenever JavaScript object ordering permits.

Can this tool rename fields conditionally?

No. Version 1 applies each exact mapping wherever its source path exists. It does not support conditions, regular expressions, calculated fields, or APIs.