diff --git a/CHANGELOG.unreleased.md b/CHANGELOG.unreleased.md
index a253272bc..a4a4226ad 100644
--- a/CHANGELOG.unreleased.md
+++ b/CHANGELOG.unreleased.md
@@ -6,6 +6,7 @@
 - [Home/VM] Sort VM by start time [#3955](https://github.com/vatesfr/xen-orchestra/issues/3955) (PR [#3970](https://github.com/vatesfr/xen-orchestra/pull/3970))
 - [Editable fields] Unfocusing (clicking outside) submits the change instead of canceling (PR [#3980](https://github.com/vatesfr/xen-orchestra/pull/3980))
 - [Network] Dedicated page for network creation [#3895](https://github.com/vatesfr/xen-orchestra/issues/3895) (PR [#3906](https://github.com/vatesfr/xen-orchestra/pull/3906))
+- [Logs] Add button to download the log [#3957](https://github.com/vatesfr/xen-orchestra/issues/3957) (PR [#3985](https://github.com/vatesfr/xen-orchestra/pull/3985))
 
 ### Bug fixes
 
diff --git a/packages/xo-web/src/common/intl/messages.js b/packages/xo-web/src/common/intl/messages.js
index db5cea6ba..ac46bc500 100644
--- a/packages/xo-web/src/common/intl/messages.js
+++ b/packages/xo-web/src/common/intl/messages.js
@@ -1874,6 +1874,7 @@ const messages = {
   logError: 'Error',
   logTitle: 'Logs',
   logDisplayDetails: 'Display details',
+  logDownload: 'Download log',
   logTime: 'Date',
   logNoStackTrace: 'No stack trace',
   logNoParams: 'No params',
diff --git a/packages/xo-web/src/common/utils.js b/packages/xo-web/src/common/utils.js
index 2eb5b9196..87a454e52 100644
--- a/packages/xo-web/src/common/utils.js
+++ b/packages/xo-web/src/common/utils.js
@@ -601,3 +601,20 @@ export const getIscsiPaths = pbd => {
   const pathsInfo = pbd.otherConfig[`mpath-${pbd.device_config.SCSIid}`]
   return pathsInfo !== undefined ? JSON.parse(pathsInfo) : []
 }
+
+// ===================================================================
+
+export const downloadLog = ({ log, date, type }) => {
+  const file = new window.Blob([log], {
+    type: 'text/plain',
+  })
+  const anchor = document.createElement('a')
+  anchor.href = window.URL.createObjectURL(file)
+  anchor.download = `${new Date(date)
+    .toISOString()
+    .replace(/:/g, '_')} - ${type}.log`
+  anchor.style.display = 'none'
+  document.body.appendChild(anchor)
+  anchor.click()
+  document.body.removeChild(anchor)
+}
diff --git a/packages/xo-web/src/icons.scss b/packages/xo-web/src/icons.scss
index a74270840..4736107d3 100644
--- a/packages/xo-web/src/icons.scss
+++ b/packages/xo-web/src/icons.scss
@@ -108,6 +108,10 @@
     @extend .fa;
     @extend .fa-clipboard;
   }
+  &-download {
+    @extend .fa;
+    @extend .fa-download;
+  }
   &-shortcuts {
     @extend .fa;
     @extend .fa-keyboard-o;
@@ -489,7 +493,8 @@
   }
 
   // SR
-  &-sr, &-vdi {
+  &-sr,
+  &-vdi {
     &-reconnect-all {
       @extend .fa;
       @extend .fa-retweet;
@@ -563,7 +568,8 @@
   }
 
   // Host and VM actions
-  &-host, &-vm {
+  &-host,
+  &-vm {
     &-start {
       @extend .fa;
       @extend .fa-play;
@@ -611,12 +617,12 @@
 
   &-filters {
     @extend .fa;
-    @extend .fa-filter
+    @extend .fa-filter;
   }
 
   &-tags {
     @extend .fa;
-    @extend .fa-tags
+    @extend .fa-tags;
   }
 
   &-remove-tag {
@@ -656,11 +662,11 @@
   }
   &-minus {
     @extend .fa;
-    @extend .fa-minus
+    @extend .fa-minus;
   }
   &-plus {
     @extend .fa;
-    @extend .fa-plus
+    @extend .fa-plus;
   }
   &-clear-search {
     @extend .fa;
@@ -871,7 +877,7 @@
   &-new-vm {
     &-infos {
       @extend .fa;
-      @extend .fa-info-circle
+      @extend .fa-info-circle;
     }
     &-perf {
       @extend .fa;
@@ -990,7 +996,7 @@
     color: #ccc;
   }
 
- // About
+  // About
   &-bug {
     @extend .fa;
     @extend .fa-bug;
diff --git a/packages/xo-web/src/xo-app/logs/backup-ng/log-alert-header.js b/packages/xo-web/src/xo-app/logs/backup-ng/log-alert-header.js
index c64a82a35..d4fd131f5 100644
--- a/packages/xo-web/src/xo-app/logs/backup-ng/log-alert-header.js
+++ b/packages/xo-web/src/xo-app/logs/backup-ng/log-alert-header.js
@@ -9,6 +9,7 @@ import Icon from 'icon'
 import React from 'react'
 import ReportBugButton, { CAN_REPORT_BUG } from 'report-bug-button'
 import Tooltip from 'tooltip'
+import { downloadLog } from 'utils'
 import { get } from '@xen-orchestra/defined'
 import { injectState, provideState } from 'reaclette'
 import { keyBy } from 'lodash'
@@ -28,6 +29,8 @@ export default decorate([
   })),
   provideState({
     effects: {
+      _downloadLog: () => ({ formattedLog }, { log }) =>
+        downloadLog({ log: formattedLog, date: log.start, type: 'backup NG' }),
       restartFailedVms: () => async (
         _,
         { log: { jobId: id, scheduleId: schedule, tasks, infos } }
@@ -81,6 +84,11 @@ export default decorate([
             </Button>
           </CopyToClipboard>
         </Tooltip>
+        <Tooltip content={_('logDownload')}>
+          <Button size='small' onClick={effects._downloadLog}>
+            <Icon icon='download' />
+          </Button>
+        </Tooltip>
         {CAN_REPORT_BUG && (
           <ReportBugButton
             message={`\`\`\`json\n${state.formattedLog}\n\`\`\``}
diff --git a/packages/xo-web/src/xo-app/settings/logs/index.js b/packages/xo-web/src/xo-app/settings/logs/index.js
index 3516ded09..168410845 100644
--- a/packages/xo-web/src/xo-app/settings/logs/index.js
+++ b/packages/xo-web/src/xo-app/settings/logs/index.js
@@ -8,7 +8,7 @@ import Copiable from 'copiable'
 import NoObjects from 'no-objects'
 import SortedTable from 'sorted-table'
 import styles from './index.css'
-import { addSubscriptions } from 'utils'
+import { addSubscriptions, downloadLog } from 'utils'
 import { alert } from 'modal'
 import { createSelector } from 'selectors'
 import { CAN_REPORT_BUG, reportBug } from 'report-bug-button'
@@ -26,6 +26,13 @@ const formatMessage = data =>
     2
   )}\n${JSON.stringify(data.error, null, 2).replace(/\\n/g, '\n')}\n\`\`\``
 
+const formatLog = log =>
+  `${log.data.method}\n${JSON.stringify(
+    log.data.params,
+    null,
+    2
+  )}\n${JSON.stringify(log.data.error, null, 2).replace(/\\n/g, '\n')}`
+
 const COLUMNS = [
   {
     name: _('logUser'),
@@ -87,19 +94,16 @@ const ACTIONS = [
 const INDIVIDUAL_ACTIONS = [
   {
     handler: log =>
-      alert(
-        _('logError'),
-        <Copiable tagName='pre'>
-          {`${log.data.method}\n${JSON.stringify(
-            log.data.params,
-            null,
-            2
-          )}\n${JSON.stringify(log.data.error, null, 2).replace(/\\n/g, '\n')}`}
-        </Copiable>
-      ),
+      alert(_('logError'), <Copiable tagName='pre'>{formatLog(log)}</Copiable>),
     icon: 'preview',
     label: _('logDisplayDetails'),
   },
+  {
+    handler: log =>
+      downloadLog({ log: formatLog(log), date: log.time, type: 'XO' }),
+    icon: 'download',
+    label: _('logDownload'),
+  },
   {
     disabled: !CAN_REPORT_BUG,
     handler: log =>