Ruby Hash Formatter Online (Pretty Print / Minify / Normalize)

Category: Developer · URL: /tools/ruby-hash-formatter-online.html

Mode

Indent

String quotes

Output

Prefer key: syntax for symbol keys (when possible) Sort hash keys

Input (Ruby Hash)

Output

Notes: supports common literals ({}, [], strings, numbers, true/false, nil, symbols) and both => and key: hash syntax.

Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Use this formatter to clean up Ruby Hash literals (including nested hashes/arrays).

Paste your Ruby hash into the input box.
Choose options (Pretty/Minify, indent, quote style, key sorting, output format).
Click Format (or Minify).
Copy the result from the output area.

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Secondary intents covered: Pretty print a Ruby hash for code reviews and diffs, Minify a Ruby hash to a single line for logs or fixtures, Normalize mixed syntax (hash rockets vs symbol label keys), Validate that a pasted Ruby hash is syntactically parseable (subset), Sort hash keys to make outputs stable and comparable, Switch quote style for strings (single vs double), Convert a Ruby hash literal to JSON for debugging or APIs, Copy formatted output quickly for pasting into Ruby code

FAQ

Is this formatter safe to use with untrusted input?

Yes. It does not run Ruby or use eval; it parses a limited Ruby-literal subset in JavaScript.

What Ruby hash syntax is supported?

Common literals: hashes ({}), arrays ([]), strings, numbers, booleans, nil, symbols, and both key: and => pairs.

Can it convert hash rockets to <code>key:</code> syntax?

Yes, when the key is a simple symbol name it will output key:. Other keys keep =>.

Does it preserve comments and complex Ruby expressions?

No. Comments are ignored, and complex expressions (method calls, constants, heredocs, etc.) are not supported.

Can I sort keys for stable diffs?

Yes. Enable “Sort hash keys” to output keys in a consistent order.

Can I output JSON instead of Ruby?

Yes. Switch Output to JSON; symbols become strings and nil becomes null.

Why am I getting a parse error on valid Ruby code?

This tool intentionally supports only Ruby literal subsets. If your hash contains non-literals, simplify it (or replace values with placeholders) before formatting.