Mask Ruby code in the browser
Select classes, methods, identifiers, values, and comments to create a shareable copy that preserves Ruby syntax. Input source code is not sent to or stored on Develop Tools servers.
Open Ruby Code Masking ToolConclusion
Check API keys, tokens, private URLs, class names, method names, and comments, then create a shareable copy that retains Ruby syntax and exception context.
Separate dangerous information from investigation context before sharing
class InternalCustomerService
API_TOKEN = "dummy-secret"
def fetch_customer(customer_id:)
URI("https://internal.example.test/users/#{customer_id}")
end
end| Candidates to retain | Candidates to hide |
|---|---|
| class, def, and keyword arguments | Project Class, Method, and Constant |
| URI, Net::HTTP, Exception Type | Token, internal URL, Customer ID |
| Branches, blocks, and patterns | Comment, file path, organization name |
How to verify with the Ruby code masking tool
- 1. Extract the minimum scope needed for consultation into a separate copy.
- 2. Select classes/types, methods, identifiers, values, and comments.
- 3. Compare Ruby syntax and framework APIs.
- 4. Restore only required words by right-clicking, then share only the result.
Checklist to prevent oversights
| Category | Account to check |
|---|---|
| Authentication | API Key, Token, Password |
| connection | Host, Path ID, Database URL |
| Identifiers | Class, Module, Method, Variable |
| Nearby | Comment, Log, Backtrace, File Path |
Check whether Ruby-specific syntax is intact.
- Check that declarations and references for class, module, and def, namespaces, and ? / ! method suffixes correspond
- Whether keyword arguments, *args, **kwargs, &block, ..., do ... end, and brace blocks remain
- Check whether _1, _2, or it has not been converted to a different identifier. If it is in use, restore it by right-clicking or exclude the identifier from processing.
- Are the delimiters for String, Symbol, Heredoc, Percent Literal, and Regexp preserved? Were Interpolation and Pattern manually reconstructed as Dummy values where needed?
- Have case / in, rightward assignment, deconstruct / deconstruct_keys, endless methods, and similar features been checked against the target Ruby version?
- Check whether dynamic references such as send, public_send, define_method, and const_get use the same Dummy names as declarations.
The current Tool does not semantically analyze `_1`, `it`, dynamic Symbol references, String Interpolation, or Rails DSL. Manually align relevant output portions.
Final check before sharing with AI, an issue, or chat
- Search for API keys, access tokens, passwords, authorization, DATABASE_URL, and cookies.
- Check internal hosts, URLs, email addresses, IP addresses, customer IDs, file paths, and project names.
- Check whether the organization can be inferred from Class, Module, Constant, Method, Instance Variable, Symbol, Hash Key, or Comment
- Also separately check Rails Credentials Keys, ENV names, private Gems, Git URLs, Routes, Logs, and Backtraces.
- Compare whether investigation Context such as Ruby/Rails Version, Exception Type, Line Number, and Framework API remains.
- Share only the masking results, and retain the original source and mapping information in an access-controlled location
Secret management and masking are separate measures. Do not merely hide hard-coded Secrets before sharing; also revoke and reissue them and review the management method.
What the current Ruby code masking tool can and cannot do
| Item | Current support | Points to note |
|---|---|---|
| Input | Paste Ruby text | Do not directly load or download .rb, Gemfile, Rakefile, or .rake files. |
| Basic syntax | Classify class, module, def, endless methods, variables, and comments | Not full syntax analysis equivalent to a Ruby Parser or automatic Version detection. |
| Arguments | Retain regular arguments, keyword labels, and symbols such as *, **, &, and ... | Complex destructuring assignments and Ruby version differences require checking in the runtime environment. |
| Block | Preserve do ... end and braces as strings | Do not perform brace-block-specific scope analysis or automatically protect _1, _2, or it. |
| Literal | Preserve delimiters for String, Symbol, Regexp, Percent Literal, and Heredoc | Because the body text is replaced with values, the meanings of interpolation and regular expressions are not preserved. |
| Dynamic references | Process syntax such as send, public_send, and define_method. | Mapping between Symbol / String and Method declarations is not automatically synchronized |
| Rails | Process pasted Rails code as Ruby | Does not specially parse Rails DSL, Framework Constants, ERB, or Routes. |
| output | Copy results, clear all, and individually unmask results by right-clicking | Does not provide a mapping list, cross-file mappings, or saved history |
| Save | Save only display settings in LocalStorage. | Do not save input source, results, or mappings in LocalStorage. |
| Privacy | Process input and conversion in the browser. | Do not send or save Source and results to the Develop Tools server. |
Masking results are copies for sharing. They do not replace ruby -c, RSpec, Rails tests, RuboCop, or checks in the runtime environment.
Check specifications in primary Ruby and Rails sources.
- Ruby 4.0: Ruby Syntax
- Ruby 4.0: Pattern Matching
- Rails Guides: Securing Rails Applications
- Rails Guides: Configuring Rails Applications
- Rails Guides: Active Record Encryption
Ruby Syntax and Rails Credentials and Log Filters vary by Version. Do not conclude from article examples alone; check official Documentation and execution results for the Ruby and Rails Versions you use.
Example: ask AI about a Ruby error
Check API keys, tokens, private URLs, class names, method names, and comments, then create a shareable copy that retains Ruby syntax and exception context.
Use dummy data such as example.test instead of real tokens, real customer information, or internal URLs, and verify only the minimum scope needed to reproduce the issue.
- Extract minimal reproducible Code into a separate Copy
- Mask identifiers, values, and Comments
- Compare Ruby-specific syntax and dynamic references
- Share only the masking results
You can individually unmask anonymized locations in the result by right-clicking. Before sending, recheck whether the revealed original information is truly necessary for sharing.
Frequently asked questions
- Can I directly load .rb files, Gemfile, and Rakefile?
- Direct loading is not supported. Paste the required Ruby Text into the input field. Gemfile, Rakefile, and .rake equivalents are also handled as Text, but this is not a file-type-specific Parser.
- Can ERB, _1/it, and send symbols also be handled automatically and safely?
- Not guaranteed. ERB HTML mixing, _1 / it, dynamic Symbol/String references, and Interpolation require manual checks. Restore needed parts by right-clicking or align them to Dummy names.
- Is the entered Ruby Source sent to a server?
- Input and masking results are processed in the browser and are not sent to or stored on the Develop Tools server. Only display settings are saved to LocalStorage.