TOML to Ruby Hash Converter
Convert TOML configuration files into Ruby hashes instantly. This tool generates clean Ruby code that you can use directly in your Rails or Ruby projects. It accurately maps TOML data types to Ruby equivalents, including nested structures.
How the TOML to Ruby Hash Converter Works
This tool converts TOML configuration files into Ruby hash syntax. Paste your TOML content and get equivalent Ruby hash code that you can use directly in Ruby applications, Rails configurations, or Rake files.
The converter maps TOML structures to Ruby hashes: tables become nested hashes, arrays become Ruby arrays, strings use single or double quotes, symbols can be used for keys. Type mapping preserves integers, floats, booleans, and strings.
Output uses idiomatic Ruby syntax with proper quoting, indentation, and formatting. Copy the generated hash into your Ruby code or configuration files. Perfect for migrating configs or generating Ruby-compatible data structures.
When You'd Actually Use This
Migrating Rails configs to TOML
Moving from YAML/Ruby configs to TOML? Convert existing configs to TOML, then generate Ruby hashes to verify the structure matches your expectations.
Creating Ruby gem configurations
Your gem accepts configuration as a hash. Provide TOML examples, let users convert to Ruby hash for their initializer files. Best of both worlds.
Building Ruby data fixtures
Generate test fixtures from TOML data. Convert to Ruby hash syntax, paste into test files. Easier than maintaining pure Ruby fixture files.
Scripting with embedded data
Ruby scripts often need embedded configuration data. Store data in TOML, convert to hash, paste into scripts. Cleaner than long Ruby hash literals.
Teaching Ruby data structures
Show students how different config formats map to Ruby hashes. Compare TOML, YAML, JSON representations. Helps understand data serialization concepts.
Generating seed data
Create database seed data in TOML, convert to Ruby hash for Rails seed files. Easier to maintain TOML than complex nested Ruby hashes.
What to Know Before Using
Ruby hash syntax has variations.Hash rockets (>=) vs. colon syntax ({ key: value }). String keys vs. symbol keys. The converter uses common conventions but you may need to adjust.
String quoting follows Ruby rules.Single quotes for literal strings, double quotes for strings with interpolation or escape sequences. The converter chooses appropriately.
Nested structures become nested hashes.TOML tables translate to nested Ruby hashes. Deep nesting is valid but consider whether your Ruby code can handle it cleanly.
Arrays map directly to Ruby arrays.TOML arrays become Ruby array literals with square brackets. Element types are preserved: strings, numbers, hashes, etc.
Pro tip: For Rails configs, use symbol keys (key:) instead of string keys. It's more idiomatic and matches Rails conventions for configuration hashes.
Common Questions
Should I use symbols or strings for keys?
Symbols (:key) are more memory-efficient and idiomatic for Ruby code. Strings ("key") are needed when keys come from external sources or contain special characters.
How do I load TOML directly in Ruby?
Use the 'toml-rb' or 'toml' gem: TOML.load(file_content). No need to convert to hash syntax if you're loading TOML files at runtime.
Can I convert back from Ruby hash to TOML?
This tool does TOML to Ruby. For Ruby to TOML, use a TOML gem's dump function or a dedicated converter tool.
What about Ruby-specific values?
TOML doesn't support Ruby symbols, procs, or objects. Only basic data types convert. Ruby-specific values need manual addition after conversion.
How do I handle multiline strings?
TOML multiline strings become Ruby heredocs or concatenated strings. The converter chooses the most readable format for the output.
Is the output valid Ruby code?
Yes, the generated hash is valid Ruby syntax. Paste it into .rb files, IRB, or Rails console. It will evaluate to a proper Ruby hash object.
Can I use this for Rails credentials?
Rails credentials use YAML internally. You could convert TOML to Ruby hash, then use that to populate credentials. But YAML is the standard format.
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