diff --git a/js/grunt/fixEOL.js b/js/grunt/fixEOL.ts
similarity index 70%
rename from js/grunt/fixEOL.js
rename to js/grunt/fixEOL.ts
index dbe71793c..861ffa72a 100644
--- a/js/grunt/fixEOL.js
+++ b/js/grunt/fixEOL.ts
@@ -3,16 +3,11 @@
 /**
  * Fix end of lines for a string based on the operating system this code is being run on.
  * See https://github.com/phetsims/chipper/issues/933
+ *
  * @author Michael Kauzmann (PhET Interactive Simulations)
  */
 
-
 // modules
 const os = require( 'os' );
 
-/**
- * @public
- *
- * @returns {string}
- */
-module.exports = string => string.split( '\r' ).join( '' ).split( '\n' ).join( os.EOL );
\ No newline at end of file
+export default ( string: string ): string => string.split( '\r' ).join( '' ).split( '\n' ).join( os.EOL );
\ No newline at end of file
diff --git a/js/grunt/generateDevelopmentHTML.ts b/js/grunt/generateDevelopmentHTML.ts
index 2a55eb7e0..4ca719154 100644
--- a/js/grunt/generateDevelopmentHTML.ts
+++ b/js/grunt/generateDevelopmentHTML.ts
@@ -14,7 +14,7 @@ import * as _ from 'lodash';
 import IntentionalAny from '../../../phet-core/js/types/IntentionalAny.js';
 
 const ChipperStringUtils = require( '../common/ChipperStringUtils' );
-const fixEOL = require( './fixEOL' );
+import fixEOL from './fixEOL';
 const getPreloads = require( './getPreloads' );
 const getStringRepos = require( './getStringRepos' );
 const writeFileAndGitAdd = require( '../../../perennial-alias/js/common/writeFileAndGitAdd' );
diff --git a/js/grunt/generateREADME.ts b/js/grunt/generateREADME.ts
index 443031abd..9ce692078 100644
--- a/js/grunt/generateREADME.ts
+++ b/js/grunt/generateREADME.ts
@@ -9,7 +9,7 @@
 
 
 const ChipperStringUtils = require( '../common/ChipperStringUtils' );
-const fixEOL = require( './fixEOL' );
+import fixEOL from './fixEOL';
 const getPhetLibs = require( './getPhetLibs' );
 const getTitleStringKey = require( './getTitleStringKey' );
 const writeFileAndGitAdd = require( '../../../perennial-alias/js/common/writeFileAndGitAdd' );
diff --git a/js/grunt/getA11yViewHTMLFromTemplate.ts b/js/grunt/getA11yViewHTMLFromTemplate.ts
index 36ae0bc81..7a8745103 100644
--- a/js/grunt/getA11yViewHTMLFromTemplate.ts
+++ b/js/grunt/getA11yViewHTMLFromTemplate.ts
@@ -8,7 +8,7 @@
 
 const ChipperConstants = require( '../common/ChipperConstants' );
 const ChipperStringUtils = require( '../common/ChipperStringUtils' );
-const fixEOL = require( './fixEOL' );
+import fixEOL from './fixEOL';
 const getTitleStringKey = require( './getTitleStringKey' );
 import * as grunt from 'grunt';
 
diff --git a/js/phet-io/formatPhetioAPI.ts b/js/phet-io/formatPhetioAPI.ts
index b723a2488..080a95689 100644
--- a/js/phet-io/formatPhetioAPI.ts
+++ b/js/phet-io/formatPhetioAPI.ts
@@ -11,7 +11,7 @@
  */
 
 const assert = require( 'assert' );
-const fixEOL = require( '../grunt/fixEOL' );
+import fixEOL from '../grunt/fixEOL';
 
 import IntentionalAny from '../../../phet-core/js/types/IntentionalAny.ts';