diff --git a/types/jotform-css.js/index.d.ts b/types/jotform-css.js/index.d.ts
new file mode 100644
index 0000000000..1a712868fb
--- /dev/null
+++ b/types/jotform-css.js/index.d.ts
@@ -0,0 +1,104 @@
+// Type definitions for jotform-css.js 1.0
+// Project: https://github.com/jotform/css.js
+// Definitions by: Peter van der Woude <https://github.com/pandawood>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+declare global {
+	const cssjs: CssJsConstructor;
+}
+
+export interface CssJsConstructor {
+	new (): CssJs;
+}
+
+export const cssjs: CssJsConstructor;
+export default cssjs;
+
+export interface CssJs {
+	/**
+	 * Parses given css string, and returns css object
+	 * keys as selectors and values are css rules
+	 * eliminates all css comments before parsing
+	 * @param css string to be parsed
+	 * @returns css object
+	 */
+	parseCSS(css: string): CssJs;
+
+	/**
+	 * parses given string containing css directives
+	 * @param rules, css directive string eg color:white; font-size:18px;
+	 * @returns an array of objects containing ruleName:ruleValue pairs
+	 */
+	parseRules(rules: string): any[];
+
+	/**
+	 * returns the rule having given directive
+	 */
+	findCorrespondingRule(rules: string, directive: string, value?: string): string | boolean;
+
+	/**
+	 * Finds styles that have given selector, compress them and returns them
+	 */
+	findBySelector(cssObject: CssJs, selector: string, contains?: boolean): CssJs;
+
+	/**
+	 * deletes cssObjects having given selector, and returns new array
+	 */
+	deleteBySelector(cssObject: CssJs, selector: string): CssJs;
+
+	/**
+	 * Compresses given cssObjectArray and tries to minimize selector redundence
+	 */
+	compressCSS(cssObject: CssJs): CssJs;
+
+	/**
+	 * @returns diff css object contains changed values in css1 in regards to css2, false if same
+	 */
+	cssDiff(css1: CssJs, css2: CssJs): boolean;
+
+	/**
+	 * @param cssObject target css object array
+	 * @param newArray source array that will be pushed into cssObject parameter
+	 * @param reverse [optional], if given true, first parameter will be traversed on reversed order
+	 * effectively giving priority to the styles in newArray
+	 */
+	intelligentMerge(cssObject: CssJs, newArray: CssJs, reverse?: boolean): void;
+
+	/**
+	 * inserts new css objects into a bigger css object with same selectors grouped together
+	 * @param cssObject array of bigger css object to be pushed into
+	 * @param minimalObject single css object
+	 * @param reverse reverse [optional] default is false, if given, cssObject will be reversly traversed
+	 * resulting more priority in minimalObject's styles
+	 */
+	intelligentCSSPush(cssObject: CssJs, minimalObject: CssJs, reverse?: boolean): void;
+
+	/**
+	 * Filter outs rule objects whose type param equal to DELETED
+	 * @param rules array of rules
+	 */
+	compactRules(rules: string[]): string[];
+
+	/**
+	 * Computes string for ace editor using this.css or given cssBase optional parameter
+	 */
+	getCSSForEditor(parsedCss: CssJs, depth?: number): string;
+
+	/**
+	 * Given rules array, returns visually formatted css string to be used inside editor
+	 */
+	getCSSOfRules(rules: string, depth?: null): string;
+
+	/**
+	 * Given css string or objectArray, parses it and then for every selector,
+	 * prepends this.cssPreviewNamespace to prevent css collision issues
+	 * @returns object in which this css prepended
+	 */
+	applyNamespacing(parsedCss: CssJs | string, prefix: string): CssJs;
+
+	/**
+	 * @param css the original css string to be stripped out of comments
+	 * @returns cleaned CSS containing no css comments
+	 */
+	stripComments(css: string): string;
+}
diff --git a/types/jotform-css.js/test/jotform-css.js-global-tests.ts b/types/jotform-css.js/test/jotform-css.js-global-tests.ts
new file mode 100644
index 0000000000..95cb5f6be0
--- /dev/null
+++ b/types/jotform-css.js/test/jotform-css.js-global-tests.ts
@@ -0,0 +1,5 @@
+function addNamespace(cssString: string): string {
+	const parser = new cssjs();
+	const parsed = parser.applyNamespacing(cssString, "#id1");
+	return parser.getCSSForEditor(parsed);
+}
diff --git a/types/jotform-css.js/test/jotform-css.js-module-tests.ts b/types/jotform-css.js/test/jotform-css.js-module-tests.ts
new file mode 100644
index 0000000000..7f42f0275c
--- /dev/null
+++ b/types/jotform-css.js/test/jotform-css.js-module-tests.ts
@@ -0,0 +1,9 @@
+import cssjsParser = require("jotform-css.js");
+
+function addNamespace(cssString: string): string {
+	const parser = new cssjsParser.cssjs();
+	let parsed = parser.parseCSS(cssString);
+	parsed = parser.applyNamespacing(parsed, "#id1");
+	const css = parser.getCSSForEditor(parsed);
+	return css;
+}
diff --git a/types/jotform-css.js/tsconfig.json b/types/jotform-css.js/tsconfig.json
new file mode 100644
index 0000000000..948e34b5ce
--- /dev/null
+++ b/types/jotform-css.js/tsconfig.json
@@ -0,0 +1,24 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "strictFunctionTypes": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "test/jotform-css.js-global-tests.ts",
+        "test/jotform-css.js-module-tests.ts"
+    ]
+}
diff --git a/types/jotform-css.js/tslint.json b/types/jotform-css.js/tslint.json
new file mode 100644
index 0000000000..f93cf8562a
--- /dev/null
+++ b/types/jotform-css.js/tslint.json
@@ -0,0 +1,3 @@
+{
+    "extends": "dtslint/dt.json"
+}