diff --git a/CHANGES.rst b/CHANGES.rst
index ec128116..ab7d76b6 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -1181,7 +1181,7 @@ pywb 0.9.6 changelist
 pywb 0.9.5 changelist
 ~~~~~~~~~~~~~~~~~~~~~
 
-* s3 loading: support ``s3://`` scheme in block loader, allowing for loading index and archive files from s3. ``boto`` library must be installed seperately
+* s3 loading: support ``s3://`` scheme in block loader, allowing for loading index and archive files from s3. ``boto`` library must be installed separately
   via ``pip install boto``. Attempt default boto auth path, and if that fails, attempt anonymous s3 connection.
   
 * Wombat/Client-Side Rewrite Customizations: New ``rewrite_opts.client`` settings from ``config.yaml`` are passed directly to wombat as json. 
@@ -1277,7 +1277,7 @@ pywb 0.9.1 changelist
 
 * cdx server query: add support for ``url=*.host`` and ``url=host/*`` as shortcuts for ``matchType=domain`` and ``matchType=prefix``
 
-* zipnum cdx cluster: support loading index shared from prefix path instead of seperate location file.
+* zipnum cdx cluster: support loading index shared from prefix path instead of separate location file.
 
   The ``shard_index_loc`` config property may contain match and replace properties.
   Regex replacement is then used to obtain path prefix from the shard prefix path.
@@ -1643,7 +1643,7 @@ pywb 0.4.7 changelist
 
 * Rewrite: Parsing of html as raw bytes instead of decode/encode, detection still needed for non-ascii compatible encoding.
 
-* Indexing: Refactoring of cdx-indexer using a seperate 'archive record iterator' and pluggable cdx writer classes. Groundwork for creating custom indexers.
+* Indexing: Refactoring of cdx-indexer using a separate 'archive record iterator' and pluggable cdx writer classes. Groundwork for creating custom indexers.
 
 * Indexing: Support for 9 field cdx formats with -9 flag.
 
diff --git a/pywb/apps/frontendapp.py b/pywb/apps/frontendapp.py
index af25ea68..3129b240 100644
--- a/pywb/apps/frontendapp.py
+++ b/pywb/apps/frontendapp.py
@@ -599,7 +599,7 @@ class FrontEndApp(object):
         and message.
 
         :param dict environ: The WSGI environment dictionary for the request
-        :param str err_type: The identifier for type of error that occured
+        :param str err_type: The identifier for type of error that occurred
         :param str url: The url of the archived page that was requested
         """
         raise AppPageNotFound(err_type, url)
diff --git a/pywb/indexer/cdxindexer.py b/pywb/indexer/cdxindexer.py
index 23cb3490..77a8782b 100644
--- a/pywb/indexer/cdxindexer.py
+++ b/pywb/indexer/cdxindexer.py
@@ -384,7 +384,7 @@ url timestamp { ... }
 
     output_help = """
 Output file or directory.
-- If directory, each input file is written to a seperate output file
+- If directory, each input file is written to a separate output file
   with a .cdx extension
 - If output is '-', output is written to stdout
 """
diff --git a/pywb/manager/aclmanager.py b/pywb/manager/aclmanager.py
index 3305b912..25fa16f0 100644
--- a/pywb/manager/aclmanager.py
+++ b/pywb/manager/aclmanager.py
@@ -102,11 +102,11 @@ class ACLManager(CollectionsManager):
 
         except IOError as io:
             if must_exist:
-                print('Error Occured: ' + str(io))
+                print('Error Occurred: ' + str(io))
             return False
 
         except Exception as e:
-            print('Error Occured: ' + str(e))
+            print('Error Occurred: ' + str(e))
             return False
 
     def save_acl(self, r=None):
diff --git a/pywb/rewrite/html_rewriter.py b/pywb/rewrite/html_rewriter.py
index f10d861a..a934cb49 100644
--- a/pywb/rewrite/html_rewriter.py
+++ b/pywb/rewrite/html_rewriter.py
@@ -268,7 +268,7 @@ class HTMLRewriterMixin(StreamingRewriter):
         unesc_value = self.try_unescape(value)
         rewritten_value = self.url_rewriter.rewrite(unesc_value, mod, force_abs)
 
-        # if no rewriting has occured, ensure we return original, not reencoded value
+        # if no rewriting has occurred, ensure we return original, not reencoded value
         if rewritten_value == value:
             return orig_value
 
@@ -668,7 +668,7 @@ class HTMLRewriter(HTMLRewriterMixin, HTMLParser):
         if self.parse_comments:
             #data = self._rewrite_script(data)
 
-            # Rewrite with seperate HTMLRewriter
+            # Rewrite with separate HTMLRewriter
             comment_rewriter = HTMLRewriter(self.url_rewriter,
                                             defmod=self.defmod)
 
diff --git a/pywb/utils/binsearch.py b/pywb/utils/binsearch.py
index add2f423..205c1c58 100644
--- a/pywb/utils/binsearch.py
+++ b/pywb/utils/binsearch.py
@@ -150,7 +150,7 @@ def iter_exact(reader, key, token=b' '):
     """
     Create an iterator which iterates over lines where the first field matches
     the 'key', equivalent to token + sep prefix.
-    Default field termin_ator/seperator is ' '
+    Default field termin_ator/separator is ' '
     """
 
     return iter_prefix(reader, key + token)
diff --git a/pywb/vueui/src/i18n.js b/pywb/vueui/src/i18n.js
index 17f18237..a600ed04 100644
--- a/pywb/vueui/src/i18n.js
+++ b/pywb/vueui/src/i18n.js
@@ -32,7 +32,7 @@ export class PywbI18N {
   getMonth(id, type='long') {
     return decodeURIComponent(this.config[PywbI18N.monthIdPrefix[id]+'_'+type]);
   }
-  // can get long (default) or short day string or intial
+  // can get long (default) or short day string or initial
   // PywbI18N expects to receive day's initials like:
   // config.mon_short, config.tue_long, ...., config.<mmm>_short, config.<mmm>_long
   getWeekDay(id, type='long') {
diff --git a/tests/test_auto_colls.py b/tests/test_auto_colls.py
index cb7ecf69..726bd141 100644
--- a/tests/test_auto_colls.py
+++ b/tests/test_auto_colls.py
@@ -537,7 +537,7 @@ class TestManagedColls(CollsDirMixin, BaseConfigTest):
             main(['template', 'foo', '--remove', 'query_html'])
 
     def test_err_no_such_coll(self):
-        """ Test error adding warc to non-existant collection
+        """ Test error adding warc to non-existent collection
         """
         warc1 = self._get_sample_warc('example.warc.gz')
 
diff --git a/tests/test_integration.py b/tests/test_integration.py
index 68c2eb7b..e131ab3c 100644
--- a/tests/test_integration.py
+++ b/tests/test_integration.py
@@ -400,7 +400,7 @@ class TestWbIntegration(BaseConfigTest):
         assert resp.status_int == 200
         assert resp.headers['Content-Location'].endswith('/pywb/20140126200928{0}/http://www.iana.org/domains/root/db'.format(fmod))
 
-    def test_not_existant_warc_other_capture(self, fmod):
+    def test_not_existent_warc_other_capture(self, fmod):
         resp = self.get('/pywb/20140703030321{0}/http://example.com/?example=2', fmod)
         assert resp.status_int == 200
         assert resp.headers['Content-Location'].endswith('/pywb/20140603030341{0}/http://example.com?example=2'.format(fmod))
@@ -410,7 +410,7 @@ class TestWbIntegration(BaseConfigTest):
         assert resp.status_int == 200
         assert resp.headers['Content-Location'].endswith('/pywb/20140603030341{0}/http://example.com?example=2'.format(fmod))
 
-    def test_not_existant_warc_no_other(self, fmod):
+    def test_not_existent_warc_no_other(self, fmod):
         resp = self.get('/pywb/20140703030321{0}/http://example.com/?example=3', fmod, status=503)
         assert resp.status_int == 503