diff --git a/.travis.yml b/.travis.yml
index f98fed0..29ef4bf 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,3 +1,7 @@
+os:
+  - linux
+  - osx
+  - windows
 language: node_js
 node_js:
   - '12'
diff --git a/index.d.ts b/index.d.ts
index f6366c3..b4d9767 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -40,12 +40,12 @@ declare const del: {
 	/**
 	Delete files and directories using glob patterns.
 
-	Note that glob patterns can only contain forward-slashes, not backward-slashes, so if you want to construct a glob pattern from path components, you need to use `path.posix.join()` instead of `path.join()`.
+	Note that glob patterns can only contain forward-slashes, not backward-slashes. Windows file paths can use backward-slashes as long as the path does not contain any glob-like characters, otherwise use `path.posix.join()` instead of `path.join()`.
 
 	@param patterns - See the supported [glob patterns](https://github.com/sindresorhus/globby#globbing-patterns).
 	- [Pattern examples with expected matches](https://github.com/sindresorhus/multimatch/blob/master/test/test.js)
 	- [Quick globbing pattern overview](https://github.com/sindresorhus/multimatch#globbing-patterns)
-	@param options - You can specify any of the [`globby` options](https://github.com/sindresorhus/globby#options) in addition to the `del` options. In constrast to the `globby` defaults, `expandDirectories`, `onlyFiles`, and `followSymbolicLinks` are `false` by default.
+	@param options - You can specify any of the [`globby` options](https://github.com/sindresorhus/globby#options) in addition to the `del` options. In contrast to the `globby` defaults, `expandDirectories`, `onlyFiles`, and `followSymbolicLinks` are `false` by default.
 	@returns The deleted paths.
 
 	@example
@@ -67,12 +67,12 @@ declare const del: {
 	/**
 	Synchronously delete files and directories using glob patterns.
 
-	Note that glob patterns can only contain forward-slashes, not backward-slashes, so if you want to construct a glob pattern from path components, you need to use `path.posix.join()` instead of `path.join()`.
+	Note that glob patterns can only contain forward-slashes, not backward-slashes. Windows file paths can use backward-slashes as long as the path does not contain any glob-like characters, otherwise use `path.posix.join()` instead of `path.join()`.
 
 	@param patterns - See the supported [glob patterns](https://github.com/sindresorhus/globby#globbing-patterns).
 	- [Pattern examples with expected matches](https://github.com/sindresorhus/multimatch/blob/master/test/test.js)
 	- [Quick globbing pattern overview](https://github.com/sindresorhus/multimatch#globbing-patterns)
-	@param options - You can specify any of the [`globby` options](https://github.com/sindresorhus/globby#options) in addition to the `del` options. In constrast to the `globby` defaults, `expandDirectories`, `onlyFiles`, and `followSymbolicLinks` are `false` by default.
+	@param options - You can specify any of the [`globby` options](https://github.com/sindresorhus/globby#options) in addition to the `del` options. In contrast to the `globby` defaults, `expandDirectories`, `onlyFiles`, and `followSymbolicLinks` are `false` by default.
 	@returns The deleted paths.
 	*/
 	sync(
diff --git a/index.js b/index.js
index cbdde5a..e1956b8 100644
--- a/index.js
+++ b/index.js
@@ -2,6 +2,8 @@
 const {promisify} = require('util');
 const path = require('path');
 const globby = require('globby');
+const isGlob = require('is-glob');
+const slash = require('slash');
 const gracefulFs = require('graceful-fs');
 const isPathCwd = require('is-path-cwd');
 const isPathInside = require('is-path-inside');
@@ -36,6 +38,20 @@ function safeCheck(file, cwd) {
 	}
 }
 
+function normalizePatterns(patterns) {
+	patterns = Array.isArray(patterns) ? patterns : [patterns];
+
+	patterns = patterns.map(pattern => {
+		if (process.platform === 'win32' && isGlob(pattern) === false) {
+			return slash(pattern);
+		}
+
+		return pattern;
+	});
+
+	return patterns;
+}
+
 module.exports = async (patterns, {force, dryRun, cwd = process.cwd(), ...options} = {}) => {
 	options = {
 		expandDirectories: false,
@@ -45,6 +61,8 @@ module.exports = async (patterns, {force, dryRun, cwd = process.cwd(), ...option
 		...options
 	};
 
+	patterns = normalizePatterns(patterns);
+
 	const files = (await globby(patterns, options))
 		.sort((a, b) => b.localeCompare(a));
 
@@ -78,6 +96,8 @@ module.exports.sync = (patterns, {force, dryRun, cwd = process.cwd(), ...options
 		...options
 	};
 
+	patterns = normalizePatterns(patterns);
+
 	const files = globby.sync(patterns, options)
 		.sort((a, b) => b.localeCompare(a));
 
diff --git a/package.json b/package.json
index 6b4ac47..6e81e2f 100644
--- a/package.json
+++ b/package.json
@@ -46,8 +46,10 @@
 	"dependencies": {
 		"globby": "^10.0.0",
 		"graceful-fs": "^4.2.2",
+		"is-glob": "^4.0.1",
 		"is-path-cwd": "^2.0.0",
 		"is-path-inside": "^3.0.1",
+		"slash": "^3.0.0",
 		"p-map": "^3.0.0",
 		"rimraf": "^3.0.0"
 	},
diff --git a/readme.md b/readme.md
index 79d5280..36c0f06 100644
--- a/readme.md
+++ b/readme.md
@@ -46,7 +46,7 @@ Suggestions on how to improve this welcome!
 
 ## API
 
-Note that glob patterns can only contain forward-slashes, not backward-slashes, so if you want to construct a glob pattern from path components, you need to use `path.posix.join()` instead of `path.join()`.
+Note that glob patterns can only contain forward-slashes, not backward-slashes. Windows file paths can use backward-slashes as long as the path does not contain any glob-like characters, otherwise use `path.posix.join()` instead of `path.join()`.
 
 ### del(patterns, options?)
 
@@ -69,7 +69,7 @@ See the supported [glob patterns](https://github.com/sindresorhus/globby#globbin
 
 Type: `object`
 
-You can specify any of the [`globby` options](https://github.com/sindresorhus/globby#options) in addition to the below options. In constrast to the `globby` defaults, `expandDirectories`, `onlyFiles`, and `followSymbolicLinks` are `false` by default.
+You can specify any of the [`globby` options](https://github.com/sindresorhus/globby#options) in addition to the below options. In contrast to the `globby` defaults, `expandDirectories`, `onlyFiles`, and `followSymbolicLinks` are `false` by default.
 
 ##### force
 
diff --git a/test.js b/test.js
index edf47c1..d5a4fcf 100644
--- a/test.js
+++ b/test.js
@@ -315,3 +315,37 @@ test('cannot delete files inside process.cwd when outside cwd without force: tru
 	exists(t, ['1.tmp', '2.tmp', '3.tmp', '4.tmp', '.dot.tmp']);
 	process.chdir(processCwd);
 });
+
+test('windows can pass absolute paths with "\\" - async', async t => {
+	const filePath = path.resolve(t.context.tmp, '1.tmp');
+
+	const removeFiles = await del([filePath], {cwd: t.context.tmp, dryRun: true});
+
+	t.deepEqual(removeFiles, [filePath]);
+});
+
+test('windows can pass absolute paths with "\\" - sync', t => {
+	const filePath = path.resolve(t.context.tmp, '1.tmp');
+
+	const removeFiles = del.sync([filePath], {cwd: t.context.tmp, dryRun: true});
+
+	t.deepEqual(removeFiles, [filePath]);
+});
+
+test('windows can pass relative paths with "\\" - async', async t => {
+	const nestedFile = path.resolve(t.context.tmp, 'a/b/c/nested.js');
+	makeDir.sync(nestedFile);
+
+	const removeFiles = await del([nestedFile], {cwd: t.context.tmp, dryRun: true});
+
+	t.deepEqual(removeFiles, [nestedFile]);
+});
+
+test('windows can pass relative paths with "\\" - sync', t => {
+	const nestedFile = path.resolve(t.context.tmp, 'a/b/c/nested.js');
+	makeDir.sync(nestedFile);
+
+	const removeFiles = del.sync([nestedFile], {cwd: t.context.tmp, dryRun: true});
+
+	t.deepEqual(removeFiles, [nestedFile]);
+});