JSON lowercase keys
ClientQuick normalization when upstream sends mixed-case keys but you want consistent lowercase names.
Learn more: lowercase keys
Only changes key strings via toLowerCase—values are copied unchanged.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Input
?
Nearby workflows on Toolcore
- JSON camelCase keys — Convert every object key to camelCase recursively—in your browser, no upload. once JSON text parses on this page.
- JSON snake_case keys — Convert object keys to snake_case at every level—local JSON key normalization. once JSON text parses on this page.
- 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 formatter — JSON format online: pretty-print, minify, validate, escape, download . once JSON text parses on this page.
Common use cases
- Quick normalization when upstream sends mixed-case keys but you want consistent lowercase names.
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 camelCase keys
ClientConvert every object key to camelCase recursively—in your browser, no upload.
JSON snake_case keys
ClientConvert object keys to snake_case at every level—local JSON key normalization.
JSON rename keys
ClientMap old property names to new—deep rename at every object level; local only.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.