diff --git a/ansible/roles/setup_database/tasks/import_csv.yml b/ansible/roles/setup_database/tasks/import_csv.yml
index 19d8a5ed79..0c5b89a53e 100644
--- a/ansible/roles/setup_database/tasks/import_csv.yml
+++ b/ansible/roles/setup_database/tasks/import_csv.yml
@@ -19,10 +19,10 @@
     url: "{{ download_url }}{{ item }}"
     dest: "/tmp/{{ item }}"
   with_items:
-  - sentences.tar.bz2
-  - links.tar.bz2
+  - sentences.csv.zst
+  - links.csv.zst
   - tag_metadata.csv
-  - tags_detailed.tar.bz2
+  - tags_detailed.csv.zst
   when: import_csv == 'download'
 
 - name: Unpacking csv's
@@ -34,9 +34,9 @@
     owner: mysql
     group: mysql
   with_items:
-  - sentences.tar.bz2
-  - links.tar.bz2
-  - tags_detailed.tar.bz2
+  - sentences.csv.zst
+  - links.csv.zst
+  - tags_detailed.csv.zst
   when: import_csv == 'download'
 
 - name: Import sentences in the tatoeba database
diff --git a/docs/cron/export.sh b/docs/cron/export.sh
index 1443df4bb6..360604cc4d 100755
--- a/docs/cron/export.sh
+++ b/docs/cron/export.sh
@@ -17,28 +17,46 @@ mv /var/tmp/*csv "$DL_DIR"
 mysql -u "$DB_USER" -p"$DB_PASS" "$DB" < "$ROOT"/docs/database/scripts/wwwjdic.sql
 mv /var/tmp/*csv "$DL_DIR"
 
-echo "Starting tarring at $(date -Iseconds)"
+compress_csv () {
+    # TODO: Remove the bzipped tar archive once most users have migrated to the
+    # zstd file.  During the transition period we should monitor which files
+    # get downloaded to get an insight about how the migration is going on.
+    #
+    # It wastes some CPU time each week, disk space, and on users machine their
+    # CPU time, hence the migration to Zstd.
+    tar -cjf "${1%csv}tar.bz2" "$1"
+    zstd -19 "$1"
+}
+
+compress_tsv () {
+    # TODO: Same as above, remove the bzip file once we see fewer requests to
+    # it.
+    bzip2 -qf "$1"
+    zstd -19 -qf "$1"
+}
+
+echo "Starting compressing at $(date -Iseconds)"
 cd "$DL_DIR"
-tar -cjf sentences_base.tar.bz2 sentences_base.csv
-tar -cjf sentences_detailed.tar.bz2 sentences_detailed.csv
-tar -cjf links.tar.bz2 links.csv
-tar -cjf sentences.tar.bz2 sentences.csv
-tar -cjf contributions.tar.bz2 contributions.csv
+compress_csv sentences_base.csv
+compress_csv sentences_detailed.csv
+compress_csv links.csv
+compress_csv sentences.csv
+compress_csv contributions.csv
 rm contributions.csv
-tar -cjf comments.tar.bz2 sentence_comments.csv
+compress_csv sentence_comments.csv
 rm sentence_comments.csv
-tar -cjf wall.tar.bz2 wall_posts.csv
+compress_csv wall_posts.csv
 rm wall_posts.csv
-tar -cjf tags.tar.bz2 tags.csv
-tar -cjf user_lists.tar.bz2 user_lists.csv
-tar -cjf sentences_in_lists.tar.bz2 sentences_in_lists.csv
-tar -cjf jpn_indices.tar.bz2 jpn_indices.csv
-tar -cjf sentences_with_audio.tar.bz2 sentences_with_audio.csv
-tar -cjf user_languages.tar.bz2 user_languages.csv
-tar -cjf tags_detailed.tar.bz2 tags_detailed.csv
-tar -cjf sentences_CC0.tar.bz2 sentences_CC0.csv
-tar -cjf transcriptions.tar.bz2 transcriptions.csv
-tar -cjf sentences_base.tar.bz2 sentences_base.csv
+compress_csv tags.csv
+compress_csv user_lists.csv
+compress_csv sentences_in_lists.csv
+compress_csv jpn_indices.csv
+compress_csv sentences_with_audio.csv
+compress_csv user_languages.csv
+compress_csv tags_detailed.csv
+compress_csv sentences_CC0.csv
+compress_csv transcriptions.csv
+compress_csv sentences_base.csv
 
 echo "Starting language splitting for sentences at $(date -Iseconds)"
 # Create per-language files for the different sentences files
@@ -173,7 +191,7 @@ mysql --skip-column-names --batch tatoeba -e \
   }'    
 
 echo "Starting cleanup at $(date -Iseconds)"
-find $TEMP_DIR -path '*tsv' -exec bzip2 -qf '{}' +
+find $TEMP_DIR -path '*tsv' -exec compress_tsv '{}' +
 rm -rf $DL_DIR/per_language
 rm transcriptions.csv
 mv -f $TEMP_DIR $DL_DIR
diff --git a/src/Template/Pages/downloads.ctp b/src/Template/Pages/downloads.ctp
index 412a202f64..0e8b200f3f 100644
--- a/src/Template/Pages/downloads.ctp
+++ b/src/Template/Pages/downloads.ctp
@@ -273,7 +273,7 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>sentences_base.tar.bz2">sentences_base.tar.bz2</a>
+                        <a href="<?= $download_url ?>sentences_base.csv.zst">sentences_base.csv.zst</a>
                     </dd>
                     <dt><?= $description ?></dt>
                     <dd>
@@ -323,7 +323,7 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>links.tar.bz2">links.tar.bz2</a>
+                        <a href="<?= $download_url ?>links.csv.zst">links.csv.zst</a>
                     </dd>
                     <dt><?= $description ?></dt>
                     <dd>
@@ -350,7 +350,7 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>tags.tar.bz2">tags.tar.bz2</a>
+                        <a href="<?= $download_url ?>tags.csv.zst">tags.csv.zst</a>
                     </dd>
                     <dt><?= $description ?></dt>
                     <dd>
@@ -376,7 +376,7 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>user_lists.tar.bz2">user_lists.tar.bz2</a>
+                        <a href="<?= $download_url ?>user_lists.csv.zst">user_lists.csv.zst</a>
                     </dd>
                     <dt><?= $description ?></dt>
                     <dd>
@@ -400,8 +400,8 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>sentences_in_lists.tar.bz2">
-                                sentences_in_lists.tar.bz2
+                        <a href="<?= $download_url ?>sentences_in_lists.csv.zst">
+                                sentences_in_lists.csv.zst
                         </a>
                     </dd>
                     <dt><?= $description ?></dt>
@@ -429,7 +429,7 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>jpn_indices.tar.bz2">jpn_indices.tar.bz2</a>
+                        <a href="<?= $download_url ?>jpn_indices.csv.zst">jpn_indices.csv.zst</a>
                     </dd>
                     <dt><?= $description ?></dt>
                     <dd>
@@ -460,8 +460,8 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>sentences_with_audio.tar.bz2">
-                            sentences_with_audio.tar.bz2
+                        <a href="<?= $download_url ?>sentences_with_audio.csv.zst">
+                            sentences_with_audio.csv.zst
                         </a>
                     </dd>
                     <dt><?= $description ?></dt>
@@ -501,7 +501,7 @@ $transcriptionsOptions = $this->Downloads->createOptions('transcriptions');
                 <dl>
                     <dt><?= $filename ?></dt>
                     <dd>
-                        <a href="<?= $download_url ?>user_languages.tar.bz2">user_languages.tar.bz2</a>
+                        <a href="<?= $download_url ?>user_languages.csv.zst">user_languages.csv.zst</a>
                     </dd>
                     <dt><?= $description ?></dt>
                     <dd>
diff --git a/src/View/Helper/DownloadsHelper.php b/src/View/Helper/DownloadsHelper.php
index c851665e4d..15056d8e4d 100644
--- a/src/View/Helper/DownloadsHelper.php
+++ b/src/View/Helper/DownloadsHelper.php
@@ -48,7 +48,7 @@ private function availableFiles($basename) {
         );
 
         $dir = new Folder($perLanguageDir);
-        $paths = $dir->findRecursive(".*$basename\.tsv\.bz2$");
+        $paths = $dir->findRecursive(".*$basename\.tsv\.zst$");
         $map = [];
         foreach ($paths as $path) {
             $path = substr($path, strlen($perLanguageDir) + 1);
@@ -74,7 +74,7 @@ private function availableFiles($basename) {
     public function createOptions($basename) {
         $urlForAll = Folder::addPathElement(
             Configure::read('Downloads.url'),
-            "$basename.tar.bz2"
+            "$basename.csv.zst"
         );
         $options[0] = [
             'language' => __('All languages'),
diff --git a/tests/TestCase/View/Helper/DownloadsHelperTest.php b/tests/TestCase/View/Helper/DownloadsHelperTest.php
index 77d4716fdc..aa17b89117 100644
--- a/tests/TestCase/View/Helper/DownloadsHelperTest.php
+++ b/tests/TestCase/View/Helper/DownloadsHelperTest.php
@@ -14,7 +14,7 @@ class DownloadsHelperTest extends TestCase {
 
     private static function createTempTree() {
         $languages = ['eng', 'fra', 'jpn', 'unknown'];
-        $files = ['sentences.tsv.bz2', 'sentences_detailed.tsv.bz2', 'sentences_CC0.tsv.bz2'];
+        $files = ['sentences.tsv.zst', 'sentences_detailed.tsv.zst', 'sentences_CC0.tsv.zst'];
         foreach ($languages as $lang) {
             $path = Folder::addPathElement(TMP, ['exports', 'per_language', $lang]);
             $subdir = new Folder($path, true);
@@ -54,7 +54,7 @@ public function testCreateOptions_InvalidBasename() {
 
         $this->assertEquals(1, count($options));
         $this->assertEquals(
-            Folder::addPathElement(Configure::read('Downloads.url'), "foobar.tar.bz2"),
+            Folder::addPathElement(Configure::read('Downloads.url'), "foobar.csv.zst"),
             $options[0]['url']
         );
     }
@@ -77,14 +77,14 @@ public function testCreateOptions_ValidBasename($basename) {
         $this->assertEquals(
             Folder::addPathElement(
                 Configure::read('Downloads.url'),
-                "$basename.tar.bz2"
+                "$basename.csv.zst"
             ),
             $options[0]['url']
         );
         $this->assertEquals(
             Folder::addPathElement(
                 Configure::read('Downloads.url'),
-                ['per_language', 'eng', "eng_$basename.tsv.bz2"]
+                ['per_language', 'eng', "eng_$basename.tsv.zst"]
             ),
             $options[1]['url']
         );
@@ -103,7 +103,7 @@ public function testCreateOptions_NoPerLanguageFilesAvailable($basename) {
         $this->assertEquals(
             Folder::addPathElement(
                 Configure::read('Downloads.url'),
-                "$basename.tar.bz2"
+                "$basename.csv.zst"
             ),
             $options[0]['url']
         );