diff --git a/snippets/atob.md b/snippets/atob.md
new file mode 100644
index 000000000..e7fa6d167
--- /dev/null
+++ b/snippets/atob.md
@@ -0,0 +1,13 @@
+### atob
+
+Decodes a string of data which has been encoded using base-64 encoding.
+
+Create a `Buffer` for the given string with base-64 encoding and use `Buffer.toString('binary')` to return the decoded string.
+
+```js
+const atob = str => new Buffer(str, 'base64').toString('binary');
+```
+
+```js
+atob('Zm9vYmFy'); // 'foobar'
+```
diff --git a/snippets/btoa.md b/snippets/btoa.md
new file mode 100644
index 000000000..970cee770
--- /dev/null
+++ b/snippets/btoa.md
@@ -0,0 +1,13 @@
+### btoa
+
+Creates a base-64 encoded ASCII string from a String object in which each character in the string is treated as a byte of binary data.
+
+Create a `Buffer` for the given string with binary encoding and use `Buffer.toString('base64')` to return the encoded string.
+
+```js
+const btoa = str => new Buffer(str, 'binary').toString('base64');
+```
+
+```js
+btoa('foobar'); // 'Zm9vYmFy'
+```
diff --git a/tag_database b/tag_database
index f24d2af5c..6a577d873 100644
--- a/tag_database
+++ b/tag_database
@@ -1,8 +1,10 @@
 anagrams:string,recursion
 arrayToHtmlList:browser,array
+atob:node,string,utility
 average:math,array
 averageBy:math,array,function
 bottomVisible:browser
+btoa:node,string,utility
 byteSize:string
 call:adapter,function
 capitalize:string,array