diff --git a/.eslintrc.json b/.eslintrc.json
deleted file mode 100644
index 9c7a144..0000000
--- a/.eslintrc.json
+++ /dev/null
@@ -1,27 +0,0 @@
-{
-  "env": {
-    "es6":  true,
-    "node": true
-  },
-  "extends": "eslint:recommended",
-  "parserOptions": {
-    "ecmaVersion": 7,
-    "ecmaFeatures": { "experimentalObjectRestSpread": true }
-  },
-  "rules": {
-    "linebreak-style":    [ "error", "unix" ],
-    "no-console":           "off",
-    "no-trailing-spaces":   "error",
-    "no-var":               "error",
-    "prefer-const":         "error",
-    "quotes":             [ "error", "single" ],
-    "semi":               [ "error", "always" ],
-    "indent": [ "error", 2, {
-      "ArrayExpression":       "first",
-      "ObjectExpression":      "first",
-      "FunctionExpression":  { "parameters": "first" },
-      "FunctionDeclaration": { "parameters": "first" },
-      "CallExpression":      { "arguments":  "first" }
-    }]
-  }
-}
diff --git a/.prettierrc.json b/.prettierrc.json
new file mode 100644
index 0000000..b2d49bd
--- /dev/null
+++ b/.prettierrc.json
@@ -0,0 +1,5 @@
+{
+  "endOfLine": "lf",
+  "proseWrap": "always",
+  "singleQuote": true
+}
diff --git a/tools/combine.js b/tools/combine.js
index 762b4a9..83a1348 100644
--- a/tools/combine.js
+++ b/tools/combine.js
@@ -9,23 +9,23 @@ const files = [];
 const includeDirs = [];
 let stripGuardsEnabled = false;
 
-process.argv
-  .slice(2)
-  .forEach(arg => {
-    let match;
-    if ((match = /^-I(.*)$/.exec(arg)))
-      includeDirs.push(match[1]);
-    else if (arg === '--strip-guards')
-      stripGuardsEnabled = true;
-    else
-      files.push(arg);
-  });
+process.argv.slice(2).forEach(arg => {
+  let match;
+  if ((match = /^-I(.*)$/.exec(arg))) {
+    includeDirs.push(match[1]);
+  } else if (arg === '--strip-guards') {
+    stripGuardsEnabled = true;
+  } else {
+    files.push(arg);
+  }
+});
 
 const included = {};
 
 function readFileWithPath(fileName, dirs) {
-  if (/[/\\]/.test(fileName))
+  if (/[/\\]/.test(fileName)) {
     return fs.readFileSync(fileName, 'utf8');
+  }
 
   for (let i = 0; i < dirs.length; i++) {
     const filePath = path.resolve(dirs[i], fileName);
@@ -70,14 +70,17 @@ function strip_guards(filename, source) {
 
 function lines(filename, strip) {
   let source = readFileWithPath(filename, ['.'].concat(includeDirs));
-  if (strip) source = strip_guards(filename, source);
+  if (strip) {
+    source = strip_guards(filename, source);
+  }
   return source.split(/\r?\n/g);
 }
 
 function include(line, filename) {
   const key = path.basename(filename).toLowerCase();
-  if (included[key])
+  if (included[key]) {
     return ''; // Included earlier.
+  }
   console.error('Including: ' + key);
   included[key] = true;
   return lines(filename, true);
@@ -93,20 +96,23 @@ function add(filename) {
 const sys_included = {};
 function include_sys(line, filename) {
   const key = path.basename(filename).toLowerCase();
-  if (sys_included[key])
+  if (sys_included[key]) {
     return ''; // Included earlier.
-
+  }
   sys_included[key] = true;
 }
 
 let source = [];
 
-source = source.concat('/*')
-  .concat(fs.readFileSync('LICENSE', 'utf8')
-    .replace(/^\s+|\s+$/g, '')
-    .split(/\r?\n/g)
-    .map(line => ' * ' + line)
-    .map(line => line.replace(/\s+$/, ''))
+source = source
+  .concat('/*')
+  .concat(
+    fs
+      .readFileSync('LICENSE', 'utf8')
+      .replace(/^\s+|\s+$/g, '')
+      .split(/\r?\n/g)
+      .map(line => ' * ' + line)
+      .map(line => line.replace(/\s+$/, ''))
   )
   .concat(' */')
   .concat('');
@@ -121,7 +127,7 @@ const patterns = [
   { re: /^\s*#include\s*<([^"]*)>.*$/, fn: include_sys }
 ];
 
-restart: for (let lno = 0; lno < source.length;) {
+restart: for (let lno = 0; lno < source.length; ) {
   for (const i in patterns) {
     const line = source[lno];
     const pattern = patterns[i];
diff --git a/tools/release.js b/tools/release.js
index 1f2c98b..22f0763 100644
--- a/tools/release.js
+++ b/tools/release.js
@@ -42,12 +42,14 @@ const distTree = getSHA(stdout);
 
 exec('git reset');
 
+// prettier-ignore
 stdout = exec(`git commit-tree -S ${distTree} ` +
               `-p ${previousTagCommit} ` +
               `-p ${sourceCommit} ` +
               `-m "version ${version}"`, utf8);
 const distCommit = getSHA(stdout);
 
+// prettier-ignore
 stdout = exec(`git commit-tree -S ${sourceTree} ` +
               `-p ${sourceCommit} ` +
               `-p ${distCommit} ` +
@@ -60,6 +62,7 @@ console.log('');
 console.log(`Previous release tag: ${previousTag}`);
 console.log(`New release tag ${distTag}`);
 
+// prettier-ignore
 exec(`git tag ${distTag} ${distCommit} ` +
      `-sm "version ${version}"`, inherit);
 
diff --git a/tools/run-tests.js b/tools/run-tests.js
index 33d69de..7263383 100644
--- a/tools/run-tests.js
+++ b/tools/run-tests.js
@@ -1,4 +1,3 @@
-
 const spawn = require('child_process').spawn;
 const basename = require('path').basename;
 
@@ -6,21 +5,22 @@ const test_exes = process.argv.slice(2);
 run_tests(test_exes);
 
 function run_tests(test_exes, num = 0, fail_count = 0) {
-  if (test_exes.length <= num)
+  if (test_exes.length <= num) {
     return done(test_exes, fail_count);
+  }
 
   const test_exe = test_exes[num];
   const test_name = basename(test_exe, '.exe');
 
-  console.log('(%d/%d) %s...', (num + 1), test_exes.length, test_name);
+  console.log('(%d/%d) %s...', num + 1, test_exes.length, test_name);
 
   const child = spawn(test_exe, [], { encoding: 'utf8' });
 
   let out = '';
-  child.stdout.on('data', (data) => out += data);
-  child.stderr.on('data', (data) => out += data);
+  child.stdout.on('data', data => (out += data));
+  child.stderr.on('data', data => (out += data));
 
-  child.on('exit', (code) => {
+  child.on('exit', code => {
     if (code === 0) {
       console.log('  PASS');
     } else {
@@ -38,4 +38,3 @@ function done(test_exes, fail_count) {
 
   process.exit(fail_count == 0 ? 0 : 1);
 }
-