How It Works

Generates a sectioned, deduplicated .gitignore for your project’s languages and tools. Common generators like gitignore.io fetch the template from a server; here templates ship with the page, and folder selection never leaves the browser either — only file names are read, never contents.

Two ways in

Pick a folder — the browser hands over every file’s name and relative path inside the folder you choose. This tool reads only those names (file.name, webkitRelativePath); no file content is ever read, and FileReader is never called anywhere in this code. It pre-checks matching templates from the names alone.
Pick tags — without selecting a folder, check as many templates as you want from a filterable list. Fully functional on its own, even in a browser that doesn’t support webkitdirectory.

Both paths work together: folder detection pre-checks templates, you correct them.

Detection rules

package.json → Node.js; if next.config.js/.mjs/.ts is also present, Next.js is added.
composer.json → PHP (Composer) and Laravel.
Cargo.toml → Rust.
go.mod → Go.
*.xcodeproj → Xcode.
.idea/ → JetBrains IDEs.
.DS_Store → macOS.

Rules stay broad on purpose: a false positive is cheap (you uncheck it), a missed template is more expensive. You can also check any template by hand.

Output

Each selected template appears under its own ### Name ### heading; a line that appears in more than one template is kept only in the first section it shows up in and dropped from later ones. Copy the output to your clipboard, use “Copy as command” for a cat > .gitignore <<'EOF' … EOF shell command that writes the file under the right name directly, or download it as a file. The command overwrites an existing .gitignore file. Chrome and other Chromium-based browsers save the download as gitignore, without the leading dot; use the command if you need the exact name, or rename the downloaded file by hand. The command only works in bash/zsh — it won’t run in Windows cmd or PowerShell.

Privacy

This tool runs entirely in your browser and makes no network requests. When you pick a folder, the only thing read is file and subfolder names — contents are never read or sent anywhere. The templates themselves ship with the page too, so nothing is fetched while generating output.