Verilog Code Formatter
A free online Verilog code formatter designed for engineers, students, and educators who need consistent, readable Verilog or SystemVerilog source.
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Worked Example & Common Values
Below is a sample worked calculation demonstrating how Verilog Code Formatter processes input data instantly inside your browser.
Minified string: {"id":1,"status":"active","roles":["admin"]}
{
"id": 1,
"status": "active",
"roles": [
"admin"
]
}
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About This Tool
Conceptually, formatting follows a language-aware pipeline: tokenize input, parse into a structured representation, apply style rules, and emit reformatted code. It preserves semantics and comments while adjusting indentation, spacing, and line breaks. Features include automatic alignment of assignments, consistent block indentation, padding around operators, and line-wrapping for long statements; profiles match common industry conventions or can be customized for institutional style.
Who benefits: hardware design engineers, verification teams, educators, and students who review HDL code or prepare it for documentation. The tool reduces review time, improves consistency across a project, and supports faster onboarding by providing an agreed-upon baseline.
Core differentiators include language-aware parsing that minimizes the risk of altering logic, support for Verilog-2001/2005 and SystemVerilog subsets, non-destructive transformations, and ready-to-use output suitable for CI pipelines or batch processing. Typical use cases are pre-commit formatting, automated code reviews, and cleaning large legacy codebases before refactoring.
How to Use
- Provide inputs: supply Verilog or SystemVerilog source text to the formatter.
- Choose formatting profile: select a standard or customize indentation, line length, and alignment rules.
- Run formatting: execute the formatter to transform the code.
- Retrieve outputs: obtain reformatted code and a non-destructive diff summary.
- Validate: review key semantics remain unchanged and re-run quick checks if integrated into CI.
Frequently Asked Questions
Find Quick Answers
What languages are supported?
Will formatting modify logic?
Can I customize the style?
Can it be integrated into CI/CD?
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