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Input
JSON
Limit
1 MiB
Runtime
Browser

Convert a flat JSON string map to Properties

Serialize a flat JSON object of string values using documented Properties escapes and deterministic key output.

Local processingNo sign-upNo content upload

Convert JSON to Properties

Inputs are limited to 1 MiB and stay in this browser tab.

Paste or edit the source. Tool Swim does not upload or save it.

Java Properties result

Nothing is placed in a URL, account, or remote log.

What this tool does

Bounded, explicit, and local

Only a flat string map has an unambiguous Properties representation. Arrays, nested objects, null, numbers, and Booleans are rejected rather than silently stringified or flattened.

Escaping follows the target grammar

Spaces and separator characters are escaped where required so Java can load the emitted keys and values. The output is data, not a Java source string literal.

Character encoding remains an integration choice

The browser returns Unicode text. Save and load it through a Java API whose Reader or InputStream encoding contract matches the deployment.

Primary references

Questions and answers

Related INI and Properties tools