.gitignore Generator

A .gitignore file specifies intentionally untracked files that Git should ignore. Files already tracked by Git are not affected; to ignore a file that is already committed, you must untrack it first using git rm --cached. The patterns declared in this file are evaluated on every staging activity, preventing heavy compilation outputs, package dependencies, local secrets, and system configuration noise from leaking into your project repository history.

Exclusion rules follow standard globbing patterns. A blank line matches no files, and lines starting with a hash symbol (#) act as readable comments. A trailing slash (e.g., build/) specifies that the pattern matches directories only. Wildcards like * match zero or more characters within a path level, while double asterisks (**) match directories recursively across any subdirectories (e.g. **/logs/*.log matches logs at any depth).

The exclamation mark (!) acts as a negation operator that re-includes paths previously ignored by another pattern. This is highly useful when you want to ignore an entire directory (like config/) but explicitly preserve a single required baseline configuration (like !config/settings.example.json). Note that Git cannot re-include a file if a parent directory of that file is completely excluded.

All processing, preset merging, and deduplication run completely inside your local browser using client-side JavaScript. No project files, filenames, or directory paths are ever uploaded or transmitted to external servers. This keeps your corporate infrastructure structures and repository configurations fully private and secured within your browser sandbox environment.