Codee Formatter

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Format your Fortran instantly.

Ensure cleaner, standardized, more consistent code.

The first step toward high-quality development.
Built with and for the Fortran community.

📄 What it does

Automatically formats free-form Fortran (from Fortran 77 onward)
Enforces consistent coding standards across the codebase
Improves readability and long-term maintainability through structured formatting
Helps streamline code reviews by standardizing code layout

🦾 Key capabilities

More than 20 configurable style options to adapt formatting to project-specific coding conventions
Converts fixed-form code to free-form, helping simplify the maintenance of legacy projects
Designed for integration into CLI workflows, IDEs, and CI/CD pipelines

🔗 Learn more in the Codee Formatter documentation ⟶

FEATURE SET COMPARISON

Codee Formatter vs Other Fortran Formatters

Feature name	Feature description	Codee	fprettify	fortitude	findent
CLI Integration	Command-line simple usage, integrable into editors or CI pipelines
Config File Customization	Customization file for code style enforcement with extensive documentation
Partial File Formatting	Format only parts of the code, ideal for IDE selections or git commits
Format Suppression Comments	Suppression of formatting in code sections with comments
Detailed Documentation	Up-to-date detailed documentation with all the options explained
Integration Guides	Step-by-step guides with integration with git, the most used IDEs and CI pipelines
Modern Fortran Support	Support up to the latest version of Fortran (2023)
Fixed Form Support	Support for legacy fixed-form Fortran format)
Automatic Line Indentation	Automatic indentation based on code scope
Column Limit	Breaking long lines into multiple smaller ones
Operator Spacing Consistency	Consistent spacing around operators and keywords
Uniform Operator Style	Choose between symbolic or literal representation of Fortran operators
Consistent Keyword Casing	Ensure consistent casing of keywords, identifiers and operators
End Statement Style	Ensure joined/separated, with/without names end statements
Double-Colon in Declarations	Add missing double-colon token to variable declaration
Kind Keyword Enforcement	Enforcing the usage of the kind keyword in intrinsic declaration
Split Multiline Statements	Break each statement into a separate line
Remove Superfluous Semicolons	Removes unnecessary semicolons
Whitespace Cleanup	Redundant EOL, trailing whitespace and consecutive whitespaces
EOL Normalization	Enforce consistent end-of-line (LF or CRLF)
Maintenance and Support	Indicates whether the tool is actively maintained and offers customer support

Why Developers Trust Codee Formatter

"Codee Formatter is getting better and better! I've used it from the first day and there is a lot of improvement. Today, many people use AI for formatting. Still, Codee Formatter is the most trustworthy tool! It is safe and it wont change code ridiculously like AI. Codee Formatter gives consistent results, something AI can't match."

CHENG, Ho Lam

PhD in Physics at CUHK

“Using Codee for code modernization is faster and more profitable than relying on AI inference. And it is less risky. […] We do not say that using AI-driven programming assistants is wrong, but […] they are not as efficient as we need it to be. Paradoxically, the AI-driven programming assistants help in Fortran code modernization only if they are supervised by a well-experienced programmer.”

Veselin Kolev

PhD, CEO Cluster Operations at Discoverer Supercomputer PetaSC Bulgaria

“In most cases, we found that using Codee vs. Cursor.sh to modernize old Fortran 77 code is at least 8 to 10 times faster, on average. If we include the time spent verifying the code’s validity after it was modernized […] the Codee approach for modernization saves 25 times more time overall.”

"Thanks for this amazing tool! It is awesome to finally have a Fortran formatter that doesn't rely on regexp and has proper context. I am now heavily advising it to my colleagues."

Emmanuel Lanti

HPC applications specialist

"I am impressed by the speed, and the configuration is very simple and extensive. There are still a couple of things that are missing to get it perfect, but it’s getting close."

Computational Scientist

Need more than formatting?

Take your Fortran development further with Codee Analyzer — deep static analysis for correct, modern, secure, portable and optimized code.

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