JSON empty string to null
ClientNormalize forms that send blank text where your API expects null for optional fields.
Learn more: empty to null
Exact empty strings only—whitespace-only strings are not converted unless trimmed first.
Local processing
Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.
Input
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Nearby workflows on Toolcore
- JSON null to empty string — Replace JSON null leaves with empty strings—recursive, local transformation. once JSON text parses on this page.
- JSON cleaner — Remove null and optional empty values recursively—pretty-printed output; local only. once JSON text parses on this page.
- JSON trim strings — Trim leading and trailing whitespace from every string value in JSON—local cleanup. 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
- Normalize forms that send blank text where your API expects null for optional fields.
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 null to empty string
ClientReplace JSON null leaves with empty strings—recursive, local transformation.
JSON cleaner
ClientRemove null and optional empty values recursively—pretty-printed output; local only.
JSON trim strings
ClientTrim leading and trailing whitespace from every string value in JSON—local cleanup.
JSON formatter
ClientJSON format online: pretty-print, minify, validate, escape, download .json.