diff --git a/transpile/transpiler.js b/transpile/transpiler.js
deleted file mode 100644
index df8fed3d3..000000000
--- a/transpile/transpiler.js
+++ /dev/null
@@ -1,157 +0,0 @@
-// Copyright 2021, University of Colorado Boulder
-
-/**
- * Transpiles *.ts and copies all *.js files to chipper/dist. Does not do type checking. Filters based on active-repos
- * and subsets of directories within repos (such as js/, images/, and sounds/)
- *
- * Usage:
- * cd chipper
- * node transpile/transpile-all.js --watch
- *
- * OPTIONS:
- * --watch                continue watching all directories and transpile on detected changes
- * --clean                dispose of the cache that tracks file status on startup, can be combined with other commands
- *                        you would need to run --clean if the transpiled file status ever gets out of sync with the
- *                        cache file status, for example if you deleted/modified a transpiled file
- * --skipInitial          skip the initial transpilation
- *
- * @author Sam Reid (PhET Interactive Simulations)
- */
-
-// constants
-const start = Date.now();
-const statusPath = '../chipper/transpile/cache/status.json';
-const args = process.argv.slice( 2 );
-const root = '../';
-
-// Directories in a sim repo that may contain things for transpilation
-// This is used for a top-down seach in the initial transpilation and for filtering relevant files in the watch process
-const subdirs = [ 'js', 'images', 'sounds' ];
-
-// imports
-const fs = require( 'fs' );
-const path = require( 'path' );
-const crypto = require( 'crypto' );
-const core = require( '@babel/core' );
-
-// Track the status of each repo
-let status = {};
-
-// Make sure a directory exists for the cached status file
-fs.mkdirSync( path.dirname( statusPath ), { recursive: true } );
-
-// Clear the cache on `--clean`
-if ( args.includes( '--clean' ) ) {
-  fs.writeFileSync( statusPath, JSON.stringify( {}, null, 2 ) );
-}
-
-// Load cached status
-try {
-  status = JSON.parse( fs.readFileSync( statusPath, 'utf-8' ) );
-}
-catch( e ) {
-  status = {};
-  fs.writeFileSync( statusPath, JSON.stringify( status, null, 2 ) );
-}
-
-/**
- * Transpile the file using babel, and write it to the corresponding location in chipper/dist
- * @param {string} filename
- * @param {string} text - file text
- */
-const transpileFunction = ( filename, text ) => {
-  const x = core.transformSync( text, {
-    filename: filename,
-    presets: [ '@babel/preset-typescript' ],
-    sourceMaps: 'inline'
-  } );
-  const relativePath = path.relative( root, filename );
-  const targetPath = path.join( root, 'chipper', 'dist', ...relativePath.split( path.sep ) ).split( '.ts' ).join( '.js' );
-  fs.mkdirSync( path.dirname( targetPath ), { recursive: true } );
-  fs.writeFileSync( targetPath, x.code );
-};
-
-/**
- * For *.ts and *.js files, checks if they have changed file contents since last transpile.  If so, the
- * file is transpiled.
- * @param {string} path
- */
-const visitFile = path => {
-  if ( path.endsWith( '.js' ) || path.endsWith( '.ts' ) ) {
-    const changeDetectedTime = Date.now();
-    const text = fs.readFileSync( path, 'utf-8' );
-    const hash = crypto.createHash( 'md5' ).update( text ).digest( 'hex' );
-
-    // If the file has changed, transpile and update the cache
-    if ( !status[ path ] || status[ path ].md5 !== hash ) {
-      transpileFunction( path, text );
-      status[ path ] = { md5: hash };
-      fs.writeFileSync( statusPath, JSON.stringify( status, null, 2 ) );
-      console.log( ( Date.now() - changeDetectedTime ) + 'ms: ' + path );
-    }
-  }
-};
-
-let activeRepos = fs.readFileSync( '../perennial/data/active-repos', 'utf-8' ).trim().split( '\n' );
-
-// Recursively visit a directory for files to transpile
-const visitDirectory = ( dir => {
-  if ( fs.existsSync( dir ) ) {
-    const files = fs.readdirSync( dir );
-    files.forEach( file => {
-      const child = dir + path.sep + file;
-      if ( fs.lstatSync( child ).isDirectory() ) {
-        visitDirectory( child );
-      }
-      else {
-        visitFile( child );
-      }
-    } );
-  }
-} );
-
-// Visit all the subdirectories in a repo that need transpilation
-const visitRepo = repo => subdirs.forEach( subdir => visitDirectory( `../${repo}/${subdir}` ) );
-
-// Initial pass
-if ( !args.includes( '--skipInitial' ) ) {
-  activeRepos.forEach( repo => visitRepo( repo ) );
-  console.log( 'Finished initial transpilation in ' + ( Date.now() - start ) + 'ms' );
-}
-
-// Watch process
-if ( args.includes( '--watch' ) ) {
-  fs.watch( '../', { recursive: true }, ( eventType, filename ) => {
-
-    if ( filename.includes( '/node_modules/' ) ||
-         filename.includes( '.git/' ) ||
-         filename.includes( 'chipper/dist/' ) ||
-         filename.includes( 'transpile/cache/status.json' ) ||
-
-         // Temporary files sometimes saved by the IDE
-         filename.endsWith( '~' ) ) {
-
-      // ignore
-    }
-    else if ( filename === 'perennial/data/active-repos' ) {
-      const newActiveRepos = fs.readFileSync( '../perennial/data/active-repos', 'utf-8' ).trim().split( '\n' );
-      console.log( 'reloaded active repos' );
-      const newRepos = newActiveRepos.filter( repo => !activeRepos.includes( repo ) );
-
-      //Scan anything that was added
-      newRepos.forEach( repo => {
-        console.log( 'New repo detected in active-repos, transpiling: ' + repo );
-        visitRepo( repo );
-      } );
-      activeRepos = newActiveRepos;
-    }
-    else {
-      args.includes( '--verbose' ) && console.log( eventType, filename );
-      const terms = filename.split( path.sep );
-      if ( activeRepos.includes( terms[ 0 ] ) && subdirs.includes( terms[ 1 ] ) ) {
-        visitFile( '../' + filename );
-      }
-    }
-  } );
-  console.log( 'Watching...' );
-}
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