What does this tool do?
JSON to Ruby Hash turns the JSON you paste into a valid Ruby hash literal. The output comes as data = {...}, ready to drop straight into a .rb file, making it useful for Ruby and Rails developers and anyone who needs to embed sample data quickly.
How to use it
- Paste or type your data into the left field.
- The result is generated instantly on the right.
- Use the Copy button to grab the output.
Hash rocket syntax
The tool maps keys to string keys using the hash rocket (=>), producing the "name" => value form. This keeps JSON keys as strings rather than symbols, so it works safely with any key name, including ones with spaces or special characters. Nested structures are indented with two spaces, matching the community-standard Ruby style. The result is valid Ruby code that runs the moment you copy and paste it.
Ruby value equivalents
JSON null becomes Ruby's nil, while true and false map straight to Ruby booleans. JSON objects ({}) become Ruby hashes and JSON arrays ([]) become Ruby arrays. Strings are wrapped in double quotes, with backslashes and double quotes escaped, so deeply nested data keeps its integrity when embedded into Ruby source. There's no need to parse JSON at runtime.
Frequently asked questions
Are keys generated as symbols or strings?
They are generated as string keys using the hash rocket (=>) syntax, e.g. "name" => "Alice", which works safely with any key name.
How is JSON null represented?
It becomes Ruby's nil, while JSON true and false map directly to Ruby's true and false.
How many spaces does the indentation use?
It uses two spaces, the standard indent width recommended by common Ruby style guides.
Is JSON to Ruby Hash free?
Yes. JSON to Ruby Hash and all 300+ tools on MagmaNex are completely free with no signup or account required.
Is my data safe?
Yes. Everything runs locally in your browser. The data you enter is never sent to a server, stored, or shared.
Does it work on mobile?
Yes. JSON to Ruby Hash works on phones, tablets and desktops — no app download needed.
🔒 Privacy: everything runs in your browser, your data is never sent to a server.