🚫 Gitignore Generator
By ToolNimba Dev Tools Team · Updated 2026-06-19
Tick every language, framework, OS and editor your project uses. Rules are combined and deduplicated.
Select at least one stack to build your .gitignore file.
A .gitignore file tells Git which files and folders to leave out of version control: build output, dependency caches, secrets, and editor or OS junk. This generator builds one for you. Tick the stacks your project uses, such as Node, Python, Java, macOS, Windows, VS Code, or JetBrains, and it stitches the matching rule snippets into a single tidy file with section headers, removes any duplicate patterns, and lets you copy it or download it straight to your repo root.
What is the Gitignore Generator?
Git tracks everything in your working directory by default, but you almost never want that. Compiled artifacts, the node_modules folder, virtual environments, log files, and machine-specific editor settings do not belong in a shared repository: they bloat the history, cause merge conflicts, and can leak secrets. A .gitignore file is a plain-text list of patterns that Git uses to decide what to skip. Each line is either a glob pattern (such as *.log), a directory (node_modules/), or a negation (!keep.txt) that re-includes something an earlier rule excluded.
Most projects pull from a handful of well-known templates: one for the language or runtime, one for the operating system that produces files like .DS_Store or Thumbs.db, and one for the code editor or IDE that drops a .vscode or .idea folder. Maintaining these by hand is tedious and error-prone, which is why a generator helps. By combining curated snippets, you get a file that covers the real sources of clutter without guessing at every pattern.
This tool keeps the output clean in two ways. First, it groups rules under a clear comment header for each stack, so you can see at a glance where every pattern came from and edit confidently later. Second, it deduplicates: if two stacks both ignore build/ or *.log, the pattern appears only once. The result is a file you can drop in as-is, then tweak for the few project-specific paths only you know about.
When to use it
- Starting a new repository and wanting a sensible .gitignore in seconds instead of copying from an old project.
- Adding a second language or framework to an existing project and needing the extra ignore rules merged in cleanly.
- Cleaning up a repo where committed build artifacts or editor folders keep causing noisy diffs and merge conflicts.
- Standardising .gitignore files across a team so everyone ignores the same OS and IDE clutter.
How to use the Gitignore Generator
- Tick every stack your project uses: language or runtime, operating system, and code editor or IDE.
- Use Select all or Clear all to toggle everything at once if that is faster.
- Read the combined, deduplicated .gitignore in the output box.
- Click Copy to put it on your clipboard, or Download to save it as a .gitignore file.
- Place the file in the root of your repository and commit it.
Formula & method
Worked examples
A Node project on macOS, edited in VS Code. You select Node, macOS, and VS Code.
- Node contributes node_modules/, dist/, .env, *.tsbuildinfo and similar build and dependency rules.
- macOS contributes .DS_Store, ._*, .Spotlight-V100 and other Finder artifacts.
- VS Code contributes .vscode/* with negations like !.vscode/settings.json to keep shared config.
- No pattern is shared between these three, so nothing is dropped as a duplicate.
- The file is written with three labelled sections in the order you picked them.
Result: A .gitignore with three headered sections covering dependencies, OS junk, and editor files.
A Python and Java repo. You select Python and Java, both of which ignore build/.
- Python is processed first and emits build/, dist/, __pycache__/, .venv/ and friends.
- Java is processed next and would emit target/, *.class, .gradle/ and build/.
- The generator sees build/ was already added by Python, so it omits the duplicate under Java.
- No other Java pattern overlaps with Python, so build/ is the only line removed.
- Every remaining Java pattern is new and is kept under the Java header.
Result: Both stacks are included with build/ appearing only once, under the Python section.
Stacks available in this generator and what they ignore
| Stack | Typical patterns ignored |
|---|---|
| Node | node_modules/, dist/, build/, coverage/, .env, *.tsbuildinfo |
| Python | __pycache__/, *.pyc, .venv/, *.egg-info/, .pytest_cache/ |
| Java | *.class, *.jar, target/, .gradle/, bin/, .classpath |
| macOS | .DS_Store, ._*, .Spotlight-V100, .Trashes |
| Windows | Thumbs.db, Desktop.ini, $RECYCLE.BIN/, *.lnk |
| VS Code | .vscode/* (keeping shared settings.json, tasks.json, launch.json) |
| JetBrains | .idea/, *.iml, out/, cmake-build-*/ |
Common .gitignore pattern syntax
| Pattern | Meaning |
|---|---|
| node_modules/ | Ignore a directory and everything inside it |
| *.log | Ignore every file ending in .log, in any folder |
| /secret.txt | Ignore secret.txt only in the repo root, not in subfolders |
| !keep.log | Re-include keep.log even though *.log would have ignored it |
| build/ | Trailing slash means match a directory, not a file of that name |
| # comment | A line starting with # is a comment and is ignored by Git |
Common mistakes to avoid
- Adding .gitignore after files are already committed. A .gitignore only affects untracked files. If you already committed node_modules or a build folder, Git keeps tracking it. Remove it from tracking with git rm -r --cached, then commit, and the ignore rule takes effect from then on.
- Ignoring a folder but expecting one file inside to stay. Once a parent directory is ignored, Git will not look inside it, so a later negation like !logs/keep.txt is ignored too. Ignore the contents (logs/*) rather than the folder, then add the negation for the file you want to keep.
- Committing secrets before ignoring them. Adding .env to .gitignore does not erase a secret you already pushed. The value stays in the Git history. Rotate the exposed credential and, if needed, rewrite history to purge it.
- Using Windows backslashes in patterns. Git always uses forward slashes in .gitignore paths, even on Windows. Write build/output, not build\output, or the rule will not match.
Glossary
- .gitignore
- A plain-text file listing patterns for files and folders Git should not track.
- Pattern
- A single line in .gitignore, such as *.log or node_modules/, that Git matches against paths.
- Glob
- Wildcard matching where * stands for any run of characters within a path segment.
- Negation
- A pattern starting with ! that re-includes a path an earlier rule would have ignored.
- Untracked file
- A file in your working directory that Git is not yet following. Only untracked files are affected by .gitignore.
- Repo root
- The top folder of your repository, where the .git directory lives and where the main .gitignore usually sits.
Frequently asked questions
What is a .gitignore file?
It is a plain-text file in your repository that lists patterns for files and folders Git should not track, such as build output, dependency caches, secrets, and editor or operating-system junk. Keeping these out of version control reduces noise, avoids merge conflicts, and prevents accidental leaks.
Where do I put the generated file?
Save it as a file literally named .gitignore in the root of your repository, next to your project folder. Git applies it to that folder and all subfolders. You can also place additional .gitignore files in subdirectories for more specific rules.
How are duplicate rules handled?
When two selected stacks share a pattern, such as build/ in both Python and Java, the generator keeps it only once, under the first stack that uses it. This keeps the file short and avoids confusing repeated lines.
Why does VS Code keep some files instead of ignoring everything?
The VS Code section ignores the .vscode folder but uses negations like !.vscode/settings.json to keep the shared config most teams want in version control. Editor-specific or personal files are still ignored, while project settings stay tracked.
Will this remove files Git is already tracking?
No. A .gitignore only affects untracked files. If a file was already committed, Git keeps tracking it until you untrack it with git rm --cached. Add the ignore rule, run that command on the file or folder, then commit.
Can I edit the generated file afterwards?
Yes, and you should. The generator covers common clutter, but every project has its own paths, such as a local data folder or a generated config. Add those lines under a comment of your own, and remove any section you do not need.