Why this tool is useful
Use this codec when placing user-visible text, line breaks or Unicode inside JSON configuration, API examples and deterministic test data.
Text & List Tools · runs locally
JSON String Literal Encoder and Decoder
Create a valid quoted JSON string literal from text or strictly decode one literal without evaluating code.
Ready. Your working data stays in this browser.
How it works
Encoding delegates to the JSON string grammar; decoding uses JSON parsing and rejects numbers, objects, arrays and trailing content instead of executing input.
Practical example
A line break becomes backslash-n and embedded double quotes become backslash-quote inside one valid JSON string.
Validation
The calculation is deterministic and explains validation errors instead of silently changing invalid input.
Privacy boundary
Input and output remain in this tab. Copy and download happen through browser APIs without a server upload.
Result passport
Every run reports its tool mode, timestamp and input/output size so transformed data can be audited.