What is a .gitignore File?
A .gitignore file tells Git which files and directories to ignore when committing changes to a repository. Without one, build artifacts, local environment variables, dependency folders, and editor configuration files end up committed — cluttering your repo history and potentially exposing sensitive data.
Every project should have a .gitignore tailored to its stack. A Next.js project needs different rules than a Python project, and both benefit from OS and editor-specific rules on top.
What Should You Include in .gitignore?
A well-structured .gitignore covers four layers: your project stack, your OS, your editor, and any tooling specific to your workflow.
Project Stack
The core of your .gitignore. For Node.js this means node_modules and .env files. For Python it is __pycache__, .venv, and *.pyc files. Each language and framework has its own set of generated files that should never be committed.
Operating System
macOS creates .DS_Store files in every directory. Windows generates Thumbs.db and desktop.ini. Linux leaves behind .directory files. Including your OS rules prevents these from slipping into your commits.
Code Editor & IDE
VS Code stores settings in .vscode/. JetBrains IDEs use .idea/. Vim creates swap files. These are personal editor preferences that should not be shared across a team or stored in version control.
Build & CI Artifacts
Build output directories like /dist, /out, /build, and /.next should always be ignored. These are generated from source and do not belong in the repository — they can always be rebuilt from the source code.
How to Use the Generated .gitignore
Select your technologies
Search and add your project stack, OS, and editor. Use the quick-add presets for common combinations like Next.js, Python, or macOS + VS Code.
Generate the file
Click Generate and the tool fetches a combined .gitignore with clearly labelled sections for each technology you selected.
Download or copy
Download the file directly as .gitignore or copy it to your clipboard. If you already have a .gitignore, you can copy sections in and merge manually.
Place it in your project root
Add the .gitignore file to the root of your repository. Git will automatically respect it on your next commit. You can also run git rm -r --cached . to untrack files that were previously committed.
.gitignore Best Practices
Always include your OS and editor
Even on team projects where everyone uses different tools, including OS and editor rules in the project .gitignore prevents accidental commits of system files.
Commit .gitignore early
Add your .gitignore before you make your first commit. Once files are tracked by Git, adding them to .gitignore does not automatically untrack them — you need to run git rm --cached.
Never ignore .gitignore itself
The .gitignore file should always be committed to your repository so all contributors benefit from the same ignore rules.
Use global gitignore for personal rules
OS and editor rules that are specific to you (not your project) can go in a global .gitignore_global file instead. Run git config --global core.excludesfile ~/.gitignore_global to set it up.
Review generated output before committing
Generated .gitignore files cover the common cases well, but every project is different. Review the output and remove rules that do not apply or add project-specific entries as needed.
Frequently Asked Questions
What is a .gitignore file?
A .gitignore file tells Git which files and folders to ignore when staging and committing changes. Common examples are node_modules, .env files, build output directories, and OS-generated files like .DS_Store. Without a .gitignore these files end up in your repository history.
How do I use the generated .gitignore file?
Download the file and place it in the root directory of your project repository. Name it exactly .gitignore (with the dot, no extension). Git will automatically apply the rules on your next commit. If you already have a .gitignore, copy the relevant sections in manually.
Can I combine multiple technologies in one file?
Yes — that is the main purpose of this generator. Select as many technologies as your project uses and the generator combines them into a single .gitignore with clearly labelled sections for each. A typical project might include the framework, language runtime, OS, and editor.
What if I already committed files that should be ignored?
Adding files to .gitignore does not untrack files that are already committed. To untrack them, run git rm -r --cached . followed by git add . and git commit. This removes the files from tracking without deleting them from your local filesystem.
Should I include OS rules like macOS or Windows?
Yes. Even on team projects, it is good practice to include rules for the most common operating systems. .DS_Store files from macOS and Thumbs.db from Windows frequently end up committed accidentally on projects that do not have OS rules in their .gitignore.
How often is the technology list updated?
The list of supported technologies is fetched daily and covers 500+ entries including languages, frameworks, editors, and operating systems. If a technology you need is missing, you can add custom rules manually to the downloaded .gitignore file.