JSON rename one key
ClientOne-off key migration on sample payloads—distinct from full rename maps.
Learn more: renaming one key
Matches key names exactly; values and other keys stay unchanged.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Input
?
Nearby workflows on Toolcore
- JSON rename keys — Map old property names to new—deep rename at every object level; local only. once JSON text parses on this page.
- JSON prefix keys — Prepend the same string to all object keys recursively—client-side rename helper. once JSON text parses on this page.
- JSON suffix keys — Append a suffix to each object key throughout nested JSON—in the browser only. once JSON text parses on this page.
- JSON formatter — JSON format online: pretty-print, minify, validate, escape, download . once JSON text parses on this page.
Common use cases
- One-off key migration on sample payloads—distinct from full rename maps.
Common mistakes to avoid
Invalid JSON
Fix parse errors before expecting output.
FAQ
Is data uploaded?
No—all parsing and transforms run locally.
How is this different from jq?
This page focuses on one deterministic task without a filter language.
More tools
Related utilities you can open in another tab—mostly client-side.
JSON rename keys
ClientMap old property names to new—deep rename at every object level; local only.
JSON prefix keys
ClientPrepend the same string to all object keys recursively—client-side rename helper.
JSON suffix keys
ClientAppend a suffix to each object key throughout nested JSON—in the browser only.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.