diff --git a/src/index.js b/src/index.js
new file mode 100755
index 0000000..28603a9
--- /dev/null
+++ b/src/index.js
@@ -0,0 +1,133 @@
+#!/usr/bin/env node
+
+const emoticonRegex = /^(\:\w+\:|\<[\/\\]?3|[\(\)\\\D|\*\$][\-\^]?[\:\;\=]|[\:\;\=B8][\-\^]?[3DOPp\@\$\*\\\)\(\/\|])(?=\s|[\!\.\?]|$)/;
+const hashtagRegex = /^#[a-zA-Z0-9]+/;
+const urlRegex = /^(ftp|http)s?:\/\/[^\s]+/;
+const emailRegex = /^\b[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\.[A-Z|a-z]{2,}\b/;
+const addressRegex = /^@[a-zA-Z0-9]+/;
+const actionWordRegex = /^:.*:$/;
+
+const optionDefinitions = [
+    { name: 'sparse', alias: 's', type: Boolean, description: 'Print only the files, lines that have POS annotations.'},
+    { name: 'help', alias: 'h', type: Boolean, description: 'Print this usage guide.'},
+]
+
+const sections = [
+  {
+    header: 'conllu2cmc',
+    content: 'Reads CoNLL-U format from stdin and annotates emojis, emoticons, hashtags, URLs, email addresses, @addresses, and action words. Writes CoNLL-U format to stdout.'
+  },
+  {
+    header: 'Synopsis',
+    content: '$ conllu2cmc [-s] < input.conllu > output.conllu'
+  },
+  {
+    header: 'Options',
+    optionList: optionDefinitions
+  }
+]
+
+const getUsage = require('command-line-usage')
+const commandLineArgs = require('command-line-args')
+
+var options;
+try {
+  options = commandLineArgs(optionDefinitions)
+} catch (e) {
+  console.error(e.message);
+  options = { help: true };
+}
+
+if (options.help) {
+  const usage = getUsage(sections);
+  console.log(usage);
+  process.exit(1);
+}
+
+const EmojiRegex = require('emoji-regex');
+const emojiRegex = EmojiRegex();
+const readline = require('readline');
+global.header = '';
+global.standalone = false
+
+
+const rl = readline.createInterface({
+  input: process.stdin,
+  output: process.stdout,
+  terminal: false,
+  
+});
+
+
+function parseConllu(line) {
+  if (line.match('#\\s*foundry')) {
+    if (line.match('=\\s*base')) {
+      if (options.sparse) {
+        global.standalone = true
+      }
+      process.stdout.write("# foundry = cmc\n");
+    } else {
+      process.stdout.write(`${line}\n`);
+    }
+    return
+  }
+
+  if (global.standalone) {
+    if (line.match('^#\\s*filename')) {
+      global.fileheader = `${line}\n`;
+      return;
+    } else if (line.match('^#\\s*text_id')){
+      global.fileheader += `${line}\n`;
+      return;
+    } else if (line.match('^#')){
+      global.header += `${line}\n`;
+      return;
+    } else if (line.trim().match('^$')) {
+      if(global.header == "") {
+        process.stdout.write("\n");
+      }
+      global.header = '';
+      return
+    }
+  } else {
+    if (! line.match('^\\d+')) {
+      process.stdout.write(`${line}\n`);
+      return;
+    }
+  }
+
+  const columns = line.trim().split('\t');
+
+  const word = columns[1];
+  var new_tag = null;
+  if (word.match(emojiRegex)) {
+    new_tag = 'EMOIMG';
+  } else if(word.match(actionWordRegex)) {
+    new_tag = 'AKW';
+  } else if(word.match(emoticonRegex)) {
+    new_tag = 'EMOASC';
+  } else if(word.match(hashtagRegex)) {
+  } else if(word.match(urlRegex)) {
+    new_tag = 'URL';
+  } else if(word.match(emailRegex)) {
+    new_tag = 'EML';
+  } else if(! columns[3].match("^(NE|PROPN)") &&  word.match(addressRegex)) {
+    new_tag = 'ADR';
+  }
+  if (new_tag) {
+    columns[3] = columns[4] = new_tag;
+    columns[5] = '_';
+    if (global.standalone) {
+      process.stdout.write(fileheader);
+      process.stdout.write(header);
+      new_tag = null;
+      header = fileheader = '';
+    }
+    process.stdout.write(columns.join('\t') + '\n');
+  } else if (! global.standalone) {
+    process.stdout.write(`${line}\n`);
+  }
+}
+
+rl.on('line', parseConllu);
+rl.on('close', () => process.exit(0)); // important to exit, otherwise the process will hang