JSON snake_case keys

Client

Prepare JSON for Python, Ruby, or SQL-friendly conventions by snake_casing all property names.

Learn more: snake_case keys

Walks the document and renames keys with snake_case—does not change values or array ordering.

Local processing

Parsing and output formatting run entirely in your browser—nothing is uploaded for this transform.

Input

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Paste JSON, then read transformed output below.

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 kebab-case keys — Convert JSON object keys to kebab-case throughout nested structures—client-side only. 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

  • Prepare JSON for Python, Ruby, or SQL-friendly conventions by snake_casing all property 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.