diff --git a/gpx-rs/src/engine/command/edit/convert.rs b/gpx-rs/src/engine/command/edit/convert.rs
index ffedb75e2..a954ff77f 100644
--- a/gpx-rs/src/engine/command/edit/convert.rs
+++ b/gpx-rs/src/engine/command/edit/convert.rs
@@ -9,10 +9,12 @@ use crate::{Apply, CommandError, FileId, Route, Selection, State, Track};
 ///   after the routes;
 /// - a track becomes one route per segment, as a route has a single segment, and goes away. A
 ///   selected segment becomes a route and leaves its track, which stays even if it has no segment
-///   left. The routes have the information of their track, and go after the other routes.
+///   left. The routes have the information of their track, and go after the other routes;
+/// - a file with routes only has all of them converted to tracks, and a file with tracks only
+///   has all of them converted to routes. The files with both, or neither, stay as they are.
 ///
-/// The segments keep their ids, the new routes and tracks are selected. There is nothing to do
-/// for the other selections, or for tracks without segments.
+/// The segments keep their ids, the new routes and tracks are selected (the files stay selected).
+/// There is nothing to do for the other selections, or for tracks without segments.
 #[derive(Debug)]
 pub struct Convert;
 
@@ -31,14 +33,7 @@ impl Apply for Convert {
                     .into_iter()
                     .partition::<Vec<_>, _>(|rte| rte_ids.contains(&rte.id));
                 file.rte = kept;
-                let tracks: Vec<Track> = converted
-                    .into_iter()
-                    .map(|rte| Track {
-                        id: Default::default(),
-                        info: rte.info,
-                        trkseg: vec![rte.seg],
-                    })
-                    .collect();
+                let tracks = to_tracks(converted);
                 let trk_ids: HashSet<_> = tracks.iter().map(|trk| trk.id).collect();
                 file.trk.splice(0..0, tracks);
                 Selection::Track {
@@ -57,14 +52,7 @@ impl Apply for Convert {
                     .into_iter()
                     .partition::<Vec<_>, _>(|trk| trk_ids.contains(&trk.id));
                 file.trk = kept;
-                let routes = converted.into_iter().flat_map(|trk| {
-                    trk.trkseg.into_iter().map(move |seg| Route {
-                        id: Default::default(),
-                        info: trk.info.clone(),
-                        seg,
-                    })
-                });
-                add_routes(&mut file.rte, *file_id, routes)
+                add_routes(&mut file.rte, *file_id, to_routes(converted))
             }
             Selection::TrackSegment {
                 file_id,
@@ -94,8 +82,32 @@ impl Apply for Convert {
                 });
                 add_routes(&mut file.rte, *file_id, routes)
             }
+            Selection::File { file_ids } => {
+                let mut converted = false;
+                for file_id in file_ids {
+                    let Some(file) = state.files.get_mut(file_id) else {
+                        continue;
+                    };
+                    if !file.rte.is_empty() && file.trk.is_empty() {
+                        let file = Rc::make_mut(file);
+                        file.trk = to_tracks(std::mem::take(&mut file.rte));
+                    } else if file.rte.is_empty()
+                        && file.trk.iter().any(|trk| !trk.trkseg.is_empty())
+                    {
+                        let file = Rc::make_mut(file);
+                        file.rte = to_routes(std::mem::take(&mut file.trk)).collect();
+                    } else {
+                        continue;
+                    }
+                    converted = true;
+                }
+                return if converted {
+                    Ok(())
+                } else {
+                    Err(CommandError::NothingToDo)
+                };
+            }
             Selection::Empty
-            | Selection::File { .. }
             | Selection::Waypoints { .. }
             | Selection::Waypoint { .. } => return Err(CommandError::NothingToDo),
         };
@@ -113,6 +125,29 @@ impl Apply for Convert {
     }
 }
 
+/// The tracks of the routes, each with the segment of its route.
+fn to_tracks(routes: Vec<Route>) -> Vec<Track> {
+    routes
+        .into_iter()
+        .map(|rte| Track {
+            id: Default::default(),
+            info: rte.info,
+            trkseg: vec![rte.seg],
+        })
+        .collect()
+}
+
+/// The routes of the tracks, one per segment, each with the information of its track.
+fn to_routes(tracks: Vec<Track>) -> impl Iterator<Item = Route> {
+    tracks.into_iter().flat_map(|trk| {
+        trk.trkseg.into_iter().map(move |seg| Route {
+            id: Default::default(),
+            info: trk.info.clone(),
+            seg,
+        })
+    })
+}
+
 /// Adds the routes after the other routes, and gives the selection of them.
 fn add_routes(
     rte: &mut Vec<Route>,
diff --git a/gpx-rs/src/engine/command/routes_tests.rs b/gpx-rs/src/engine/command/routes_tests.rs
index 0d6bf5dd9..b36a19737 100644
--- a/gpx-rs/src/engine/command/routes_tests.rs
+++ b/gpx-rs/src/engine/command/routes_tests.rs
@@ -682,3 +682,43 @@ fn test_convert_segments_to_routes_keeps_their_track() {
         );
     }
 }
+
+#[test]
+fn test_convert_a_file_with_routes_or_tracks_only() {
+    let (mut fx, id) = fixture();
+    let before = file(&fx, id).clone();
+    let only_tracks = File {
+        trk: before.trk.clone(),
+        ..File::default()
+    };
+    let only_tracks_id = only_tracks.id;
+    fx.files.insert(only_tracks_id, Rc::new(only_tracks));
+    fx.order.0.push(only_tracks_id);
+
+    // the file with both stays as it is, the other gets one route per segment
+    fx.selection = Selection::File {
+        file_ids: [id, only_tracks_id].into(),
+    };
+    Convert.apply(&mut fx.state()).unwrap();
+    assert_eq!(lengths(file(&fx, id)), lengths(&before));
+    let routes = file(&fx, only_tracks_id);
+    assert_eq!((routes.rte.len(), routes.trk.len()), (4, 0));
+    assert_eq!(routes.rte[0].seg.id, before.trk[0].trkseg[0].id);
+    assert_eq!(routes.rte[0].info, before.trk[0].info);
+
+    // and back: one track per route
+    fx.selection = Selection::File {
+        file_ids: [only_tracks_id].into(),
+    };
+    Convert.apply(&mut fx.state()).unwrap();
+    let tracks = file(&fx, only_tracks_id);
+    assert_eq!((tracks.rte.len(), tracks.trk.len()), (0, 4));
+    assert_eq!(tracks.trk[0].trkseg[0].id, before.trk[0].trkseg[0].id);
+
+    // nothing to do for a file with both
+    fx.selection = whole(id);
+    assert_eq!(
+        Convert.apply(&mut fx.state()),
+        Err(CommandError::NothingToDo)
+    );
+}
diff --git a/website/src/lib/components/Menu.svelte b/website/src/lib/components/Menu.svelte
index 00ede01e1..b9a4e1a56 100644
--- a/website/src/lib/components/Menu.svelte
+++ b/website/src/lib/components/Menu.svelte
@@ -78,7 +78,7 @@
     } from '$lib/actions/file-actions';
     import UnsavedDialog from '$lib/components/file-list/UnsavedDialog.svelte';
     import { engine } from '$lib/engine';
-    import { allHidden } from '$lib/engine/all-hidden';
+    import { allHidden, selectedFilesConversion } from '$lib/engine/selection-stores';
     import { selectedFileIds, selectionSize } from '$lib/engine/selection-helpers';
     import { boundsManager } from '$lib/state/bounds';
     import { onMount } from 'svelte';
@@ -334,6 +334,19 @@
                             </Menubar.Item>
                         {/if}
                     {/if}
+                    {#if $selectedFilesConversion}
+                        {#if !$treeFileView}
+                            <Menubar.Separator />
+                        {/if}
+                        <Menubar.Item onclick={() => engine.convert()}>
+                            <ArrowRightLeft size="16" />
+                            {i18n._(
+                                $selectedFilesConversion === 'route'
+                                    ? 'menu.convert_to_routes'
+                                    : 'menu.convert_to_tracks'
+                            )}
+                        </Menubar.Item>
+                    {/if}
                     <Menubar.Separator />
                     <Menubar.Item onclick={() => engine.selectAll()} disabled={noFiles}>
                         <FileStack size="16" />
diff --git a/website/src/lib/components/file-list/FileListNodeLabel.svelte b/website/src/lib/components/file-list/FileListNodeLabel.svelte
index 692107144..f33e23044 100644
--- a/website/src/lib/components/file-list/FileListNodeLabel.svelte
+++ b/website/src/lib/components/file-list/FileListNodeLabel.svelte
@@ -29,7 +29,7 @@
     import { editStyle } from '$lib/components/file-list/style/utils.svelte';
     import { getSymbolKey, symbols } from '$lib/data/symbols';
     import { engine, type FileState } from '$lib/engine';
-    import { allHidden } from '$lib/engine/all-hidden';
+    import { allHidden, selectedFilesConversion } from '$lib/engine/selection-stores';
     import { normalizeColor } from '$lib/engine/file-colors';
     import { isHidden } from '$lib/engine/file-visibility';
     import {
@@ -271,7 +271,6 @@
                     <Plus size="16" />
                     {i18n._('menu.new_route')}
                 </ContextMenu.Item>
-                <ContextMenu.Separator />
             {:else if node.type === 'track'}
                 <ContextMenu.Item
                     disabled={!singleSelection}
@@ -291,6 +290,21 @@
                 <ContextMenu.Separator />
             {/if}
         {/if}
+        {#if node.type === 'file'}
+            {#if $selectedFilesConversion}
+                <ContextMenu.Item onclick={() => engine.convert()}>
+                    <ArrowRightLeft size="16" />
+                    {i18n._(
+                        $selectedFilesConversion === 'route'
+                            ? 'menu.convert_to_routes'
+                            : 'menu.convert_to_tracks'
+                    )}
+                </ContextMenu.Item>
+            {/if}
+            {#if orientation === 'vertical' || $selectedFilesConversion}
+                <ContextMenu.Separator />
+            {/if}
+        {/if}
         <ContextMenu.Item onclick={() => engine.setSelectionHidden(!$allHidden)}>
             {#if $allHidden}
                 <Eye size="16" />
diff --git a/website/src/lib/components/map/gpx-layer/distance-markers.ts b/website/src/lib/components/map/gpx-layer/distance-markers.ts
index 75f72a32e..619e7574f 100644
--- a/website/src/lib/components/map/gpx-layer/distance-markers.ts
+++ b/website/src/lib/components/map/gpx-layer/distance-markers.ts
@@ -3,7 +3,7 @@ import { engine } from '$lib/engine';
 import { getConvertedDistanceToKilometers } from '$lib/units/units';
 import { get } from 'svelte/store';
 import { map } from '$lib/components/map/map';
-import { allHidden } from '$lib/engine/all-hidden';
+import { allHidden } from '$lib/engine/selection-stores';
 import type { GeoJSONSource } from 'maplibre-gl';
 import { ANCHOR_LAYER_KEY } from '$lib/components/map/style';
 
diff --git a/website/src/lib/components/map/gpx-layer/start-end-markers.ts b/website/src/lib/components/map/gpx-layer/start-end-markers.ts
index 7b16914ce..7700daf37 100644
--- a/website/src/lib/components/map/gpx-layer/start-end-markers.ts
+++ b/website/src/lib/components/map/gpx-layer/start-end-markers.ts
@@ -2,7 +2,7 @@ import { currentTool, Tool } from '$lib/components/toolbar/tools';
 import type { GeoJSONSource } from 'maplibre-gl';
 import { get } from 'svelte/store';
 import { map } from '$lib/components/map/map';
-import { allHidden } from '$lib/engine/all-hidden';
+import { allHidden } from '$lib/engine/selection-stores';
 import { ANCHOR_LAYER_KEY } from '$lib/components/map/style';
 import { loadSVGIcon } from '$lib/utils';
 import { hoveredPoint, slicedStatistics } from '$lib/state/selection-statistics';
diff --git a/website/src/lib/docs/en/files-and-stats.mdx b/website/src/lib/docs/en/files-and-stats.mdx
index 00f85c821..a3f2be573 100644
--- a/website/src/lib/docs/en/files-and-stats.mdx
+++ b/website/src/lib/docs/en/files-and-stats.mdx
@@ -51,7 +51,7 @@ By right-clicking on a file tab, you can access the same actions as in the [edit
 
 As mentioned in the [view options section](./menu/view), you can switch to a tree layout for the files list.
 This layout is ideal for managing a large number of open files, as it organizes them into a vertical list on the right side of the map.
-In addition, the file tree view enables you to inspect the [tracks, segments, and points of interest](./gpx) contained inside the files through collapsible sections.
+In addition, the file tree view enables you to inspect the [tracks, segments, routes, and points of interest](./gpx) contained inside the files through collapsible sections.
 
 You can also apply [edit actions](./menu/edit) and [tools](./toolbar) to internal file items.
 Furthermore, you can drag and drop the inner items to reorder them, or move them in the hierarchy or even to another file.
diff --git a/website/src/lib/docs/en/gpx.mdx b/website/src/lib/docs/en/gpx.mdx
index 490265ed6..89707ab92 100644
--- a/website/src/lib/docs/en/gpx.mdx
+++ b/website/src/lib/docs/en/gpx.mdx
@@ -3,13 +3,14 @@ title: GPX file format
 ---
 
 <script>
-    import { Waypoints, MapPin } from '@lucide/svelte';
+    import { Waypoints, Route, MapPin } from '@lucide/svelte';
 </script>
 
 # { title }
 
 The <a href="https://www.topografix.com/gpx.asp" target="_blank">GPX file format</a> is an open standard for exchanging GPS data between applications and GPS devices.
 It essentially consists of a series of GPS points encoding one or multiple GPS traces, and, optionally, some points of interest.
+These traces can be stored either as tracks or as routes.
 
 GPX files may also contain metadata, of which the **name** and **description** fields are the most useful for users.
 
@@ -27,6 +28,11 @@ Some devices also store additional information such as heart rate, cadence, temp
 In most cases, GPX files contain a single track with a single segment.
 However, the hierarchy described above allows for more advanced use cases, such as planning multi-day trips with several variants for each day.
 
+### <Route size="16" class="inline-block" style="margin-bottom: 2px" /> Routes
+
+A **route** is a single continuous path described by a sequence of **route points**, which are the places to go through, like the anchor points of the [routing tool](./toolbar/routing).
+Like a track, it can have a **name**, a **description**, and **appearance properties**.
+
 ### <MapPin size="16" class="inline-block" style="margin-bottom: 2px" /> Points of interest
 
 **Points of interest** (technically called *waypoints*) represent locations of interest to show either on a GPS device or on a digital map.
diff --git a/website/src/lib/docs/en/menu/edit.mdx b/website/src/lib/docs/en/menu/edit.mdx
index f736d7b28..cc82f3766 100644
--- a/website/src/lib/docs/en/menu/edit.mdx
+++ b/website/src/lib/docs/en/menu/edit.mdx
@@ -3,14 +3,14 @@ title: Edit actions
 ---
 
 <script lang="ts">
-    import { Undo2, Redo2, Info, PaintBucket, FileStack, ClipboardCopy, Scissors, ClipboardPaste, Trash2, Plus } from '@lucide/svelte';
+    import { Undo2, Redo2, Info, PaintBucket, ArrowRightLeft, FileStack, ClipboardCopy, Scissors, ClipboardPaste, Trash2, Plus } from '@lucide/svelte';
     import DocsNote from '$lib/components/docs/DocsNote.svelte';
 </script>
 
 # { title }
 
 Unlike the file actions, the edit actions can potentially modify the content of the currently selected files.
-Moreover, when the tree layout of the files list is enabled (see [Files and statistics](../files-and-stats)), they can also be applied to [tracks, segments, and points of interest](../gpx).
+Moreover, when the tree layout of the files list is enabled (see [Files and statistics](../files-and-stats)), they can also be applied to [tracks, segments, routes, and points of interest](../gpx).
 Therefore, we will refer to the elements that can be modified by these actions as *file items*.
 Note that except for the undo and redo actions, the edit actions are also accessible through the context menu (right-click) of the file items.
 
@@ -38,6 +38,17 @@ Additionally, the selection must be a single file.
 
 </DocsNote>
 
+### <Plus size="16" class="inline-block" style="margin-bottom: 2px" /> New route
+
+Create a new route in the selected file.
+
+<DocsNote>
+
+This action is only available when the tree layout of the files list is enabled.
+Additionally, the selection must be a single file.
+
+</DocsNote>
+
 ### <Plus size="16" class="inline-block" style="margin-bottom: 2px" /> New segment
 
 Create a new segment in the selected track.
@@ -49,6 +60,19 @@ Additionally, the selection must be a single track.
 
 </DocsNote>
 
+### <ArrowRightLeft size="16" class="inline-block" style="margin-bottom: 2px" /> Convert to route/track
+
+Convert the selected routes to tracks, or the selected tracks or segments to routes.
+Since a route has a single segment, a track with multiple segments is converted into one route per segment.
+
+When the selected files contain only routes, or only tracks, you can also convert all of them at once.
+
+<DocsNote>
+
+Except for whole files, this action is only available when the tree layout of the files list is enabled.
+
+</DocsNote>
+
 ### <FileStack size="16" class="inline-block" style="margin-bottom: 2px" /> Select all
 
 Add all file items in the current hierarchy level to the selection.
diff --git a/website/src/lib/docs/en/menu/file.mdx b/website/src/lib/docs/en/menu/file.mdx
index 04fae8ecb..8d5529b51 100644
--- a/website/src/lib/docs/en/menu/file.mdx
+++ b/website/src/lib/docs/en/menu/file.mdx
@@ -15,6 +15,10 @@ The file actions menu contains a set of pretty self-explanatory file operations.
 
 Create a new empty file.
 
+### <Plus size="16" class="inline-block" style="margin-bottom: 2px" /> New route file
+
+Create a new file containing an empty [route](../gpx).
+
 ### <FolderOpen size="16" class="inline-block" style="margin-bottom: 2px" /> Open...
 
 Open files from your computer. 
diff --git a/website/src/lib/docs/en/menu/view.mdx b/website/src/lib/docs/en/menu/view.mdx
index a28bc622d..bd7240c9d 100644
--- a/website/src/lib/docs/en/menu/view.mdx
+++ b/website/src/lib/docs/en/menu/view.mdx
@@ -19,7 +19,7 @@ Hide the elevation profile to make room for the map, or show it to inspect the c
 
 Toggle the tree layout for the [file list](../files-and-stats).
 This layout is ideal for managing a large number of open files, as it organizes them into a vertical list on the right side of the map.
-In addition, the file tree view enables you to inspect the [tracks, segments, and points of interest](../gpx) contained inside the files through collapsible sections.
+In addition, the file tree view enables you to inspect the [tracks, segments, routes, and points of interest](../gpx) contained inside the files through collapsible sections.
 
 ### <Map size="16" class="inline-block" style="margin-bottom: 2px" /> Switch to previous basemap
 
diff --git a/website/src/lib/docs/en/toolbar/extract.mdx b/website/src/lib/docs/en/toolbar/extract.mdx
index f5c837159..abdcd85dd 100644
--- a/website/src/lib/docs/en/toolbar/extract.mdx
+++ b/website/src/lib/docs/en/toolbar/extract.mdx
@@ -16,7 +16,7 @@ This tool allows you to extract [tracks (or segments)](../gpx) from files (or tr
     <Extract class="text-foreground p-3 border rounded-md shadow-lg" />
 </div>
 
-Applying the tool to a file containing multiple tracks will create a new file for each of the tracks it contains.
+Applying the tool to a file containing multiple [tracks or routes](../gpx) will create a new file for each of the tracks and routes it contains.
 Similarly, applying the tool to a track containing multiple segments will create (in the same file) a new track for each of the segments it contains.
 
 <DocsNote>
diff --git a/website/src/lib/docs/en/toolbar/merge.mdx b/website/src/lib/docs/en/toolbar/merge.mdx
index 272f2dd3c..172822de4 100644
--- a/website/src/lib/docs/en/toolbar/merge.mdx
+++ b/website/src/lib/docs/en/toolbar/merge.mdx
@@ -10,11 +10,11 @@ title: Merge
 
 # <Group size="24" class="inline-block" style="margin-bottom: 5px" /> { title }
 
-To use this tool, you need to [select](../files-and-stats) multiple files, [tracks, or segments](../gpx).
+To use this tool, you need to [select](../files-and-stats) multiple files, [tracks, segments or routes](../gpx).
 
 - If your goal is to create a single continuous trace from your selection, use the **Connect the traces** option and validate.
-- The second option can be used to create or manage files with multiple [tracks or segments](../gpx).
-Merging files (or tracks) will result in a single file (or track) containing all tracks (or segments) from the selection.
+- The second option can be used to create or manage files with multiple [tracks, segments or routes](../gpx).
+Merging files (or tracks) will result in a single file (or track) containing all tracks and routes (or segments) from the selection.
 
 <DocsNote>
 
diff --git a/website/src/lib/docs/en/toolbar/scissors.mdx b/website/src/lib/docs/en/toolbar/scissors.mdx
index b54aa7775..d37d4b39f 100644
--- a/website/src/lib/docs/en/toolbar/scissors.mdx
+++ b/website/src/lib/docs/en/toolbar/scissors.mdx
@@ -27,6 +27,6 @@ To split the selected trace into two parts, click on one of the split markers di
 To split at a specific point of your choice, hover over the trace on the map.
 Scissors will appear at the cursor position, showing that you can split the trace at that point.
 
-You can choose to split the trace into two GPX files, or to keep the split parts in the same file as [tracks or segments](../gpx).
+You can choose to split the trace into two GPX files, or to keep the split parts in the same file as [tracks, segments or routes](../gpx).
 
 <DocsImage src="tools/split" alt="Hovering over the selected trace turns your cursor into scissors." />
diff --git a/website/src/lib/engine/all-hidden.ts b/website/src/lib/engine/all-hidden.ts
deleted file mode 100644
index 2a0ecb373..000000000
--- a/website/src/lib/engine/all-hidden.ts
+++ /dev/null
@@ -1,49 +0,0 @@
-import { readable } from 'svelte/store';
-import { engine, FileStateCollectionObserver, type FileState, type Selection } from '$lib/engine';
-import { isSelectionHidden } from '$lib/engine/selection-helpers';
-
-/**
- * Whether all the selected elements are hidden. It follows the selection and, through the
- * observer of the files, the state of every file (hiding, editing).
- */
-export const allHidden = readable(false, (set) => {
-    let selection: Selection = { type: 'empty' };
-    const states = new Map<string, FileState>();
-    const unsubscribes = new Map<string, () => void>();
-
-    const update = () => set(isSelectionHidden(selection, states));
-
-    const unsubscribeSelection = engine.selection.subscribe(($selection) => {
-        selection = $selection;
-        update();
-    });
-    const observer = new FileStateCollectionObserver(
-        (files) => {
-            files.forEach((store, fileId) => {
-                unsubscribes.set(
-                    fileId,
-                    store.subscribe(($file) => {
-                        states.set(fileId, $file);
-                        update();
-                    })
-                );
-            });
-        },
-        (fileId) => {
-            unsubscribes.get(fileId)?.();
-            unsubscribes.delete(fileId);
-            states.delete(fileId);
-            update();
-        },
-        () => {
-            unsubscribes.forEach((unsubscribe) => unsubscribe());
-            unsubscribes.clear();
-            states.clear();
-        }
-    );
-
-    return () => {
-        unsubscribeSelection();
-        observer.destroy();
-    };
-});
diff --git a/website/src/lib/engine/engine.ts b/website/src/lib/engine/engine.ts
index 356a7fb95..d127ee560 100644
--- a/website/src/lib/engine/engine.ts
+++ b/website/src/lib/engine/engine.ts
@@ -374,7 +374,8 @@ class Engine {
 
     /**
      * Converts the selected routes to tracks, or the selected tracks or segments to routes (one
-     * per segment), which are selected. Resolves to `false` when there is nothing to convert.
+     * per segment), which are selected. Selected files with routes only (or tracks only) have all
+     * of them converted. Resolves to `false` when there is nothing to convert.
      */
     convert() {
         return this.run((b) => b.convert());
diff --git a/website/src/lib/engine/selection-helpers.test.ts b/website/src/lib/engine/selection-helpers.test.ts
index f5e8a1e72..7ca665ee7 100644
--- a/website/src/lib/engine/selection-helpers.test.ts
+++ b/website/src/lib/engine/selection-helpers.test.ts
@@ -5,6 +5,7 @@ import type { VisibilityState } from '$lib/engine/file-visibility';
 import {
     coversSegments,
     elementId,
+    fileConversion,
     hasSelectionWithin,
     isCovered,
     isInClipboard,
@@ -274,4 +275,41 @@ describe('selection helpers', () => {
             assert.equal(isSelectionHidden(files('F1', 'F2'), states('F1')), false);
         });
     });
+
+    describe('fileConversion', () => {
+        const segment = (id: string) => ({ id, rev: id, length: 2 });
+        const structure = (routes: string[], tracks: string[]): { structure: FileStructure } => ({
+            structure: {
+                id: 'F',
+                name: 'file',
+                waypointsRev: 'rev',
+                waypoints: [],
+                routes: routes.map((id) => ({ id, segment: segment(`${id}-S`) })),
+                tracks: tracks.map((id) => ({ id, segments: [segment(`${id}-S`)] })),
+            },
+        });
+        const states = new Map([
+            ['routes', structure(['R1', 'R2'], [])],
+            ['tracks', structure([], ['T1'])],
+            ['both', structure(['R1'], ['T1'])],
+            ['none', structure([], [])],
+        ]);
+
+        it('converts files with tracks only to routes, and routes only to tracks', () => {
+            assert.equal(fileConversion(files('tracks'), states), 'route');
+            assert.equal(fileConversion(files('routes'), states), 'track');
+        });
+
+        it('does not convert files with both, neither, or a mix of the two', () => {
+            assert.equal(fileConversion(files('both'), states), undefined);
+            assert.equal(fileConversion(files('none'), states), undefined);
+            assert.equal(fileConversion(files('routes', 'tracks'), states), undefined);
+            assert.equal(fileConversion(files('unknown'), states), undefined);
+        });
+
+        it('only converts files', () => {
+            assert.equal(fileConversion(empty, states), undefined);
+            assert.equal(fileConversion(tracks('T1'), states), undefined);
+        });
+    });
 });
diff --git a/website/src/lib/engine/selection-helpers.ts b/website/src/lib/engine/selection-helpers.ts
index ac728963d..285e262ba 100644
--- a/website/src/lib/engine/selection-helpers.ts
+++ b/website/src/lib/engine/selection-helpers.ts
@@ -247,3 +247,34 @@ export function isSelectionHidden(
         })
     );
 }
+
+/**
+ * What the selected files convert to: `'route'` when they all have tracks only (with segments),
+ * `'track'` when they all have routes only, `undefined` otherwise (other selections, files with
+ * both or neither, or a mix of the two). `states` holds the files by id.
+ */
+export function fileConversion(
+    selection: Selection,
+    states: ReadonlyMap<string, { structure: FileStructure }>
+): 'route' | 'track' | undefined {
+    if (selection.type !== 'file' || selection.fileIds.length === 0) {
+        return undefined;
+    }
+    const targets = new Set(
+        selection.fileIds.map((fileId) => {
+            const structure = states.get(fileId)?.structure;
+            if (structure === undefined) {
+                return undefined;
+            } else if (structure.routes.length > 0 && structure.tracks.length === 0) {
+                return 'track' as const;
+            } else if (
+                structure.routes.length === 0 &&
+                structure.tracks.some((track) => track.segments.length > 0)
+            ) {
+                return 'route' as const;
+            }
+            return undefined;
+        })
+    );
+    return targets.size === 1 ? targets.values().next().value : undefined;
+}
diff --git a/website/src/lib/engine/selection-stores.ts b/website/src/lib/engine/selection-stores.ts
new file mode 100644
index 000000000..3c6b319b2
--- /dev/null
+++ b/website/src/lib/engine/selection-stores.ts
@@ -0,0 +1,63 @@
+import { readable, type Readable } from 'svelte/store';
+import { engine, FileStateCollectionObserver, type FileState, type Selection } from '$lib/engine';
+import { fileConversion, isSelectionHidden } from '$lib/engine/selection-helpers';
+
+/**
+ * A value computed from the selection and the states of the files. It follows the selection and,
+ * through the observer of the files, the state of every file (hiding, editing).
+ */
+function fromSelectionAndFiles<T>(
+    initial: T,
+    compute: (selection: Selection, states: ReadonlyMap<string, FileState>) => T
+): Readable<T> {
+    return readable(initial, (set) => {
+        let selection: Selection = { type: 'empty' };
+        const states = new Map<string, FileState>();
+        const unsubscribes = new Map<string, () => void>();
+
+        const update = () => set(compute(selection, states));
+
+        const unsubscribeSelection = engine.selection.subscribe(($selection) => {
+            selection = $selection;
+            update();
+        });
+        const observer = new FileStateCollectionObserver(
+            (files) => {
+                files.forEach((store, fileId) => {
+                    unsubscribes.set(
+                        fileId,
+                        store.subscribe(($file) => {
+                            states.set(fileId, $file);
+                            update();
+                        })
+                    );
+                });
+            },
+            (fileId) => {
+                unsubscribes.get(fileId)?.();
+                unsubscribes.delete(fileId);
+                states.delete(fileId);
+                update();
+            },
+            () => {
+                unsubscribes.forEach((unsubscribe) => unsubscribe());
+                unsubscribes.clear();
+                states.clear();
+            }
+        );
+
+        return () => {
+            unsubscribeSelection();
+            observer.destroy();
+        };
+    });
+}
+
+/** Whether all the selected elements are hidden. */
+export const allHidden = fromSelectionAndFiles(false, isSelectionHidden);
+
+/** What the selected files convert to, see `fileConversion`. */
+export const selectedFilesConversion = fromSelectionAndFiles<'route' | 'track' | undefined>(
+    undefined,
+    fileConversion
+);
diff --git a/website/src/locales/en.json b/website/src/locales/en.json
index df937cace..0e6849f10 100644
--- a/website/src/locales/en.json
+++ b/website/src/locales/en.json
@@ -14,6 +14,8 @@
         "new_route": "New route",
         "convert_to_route": "Convert to route",
         "convert_to_track": "Convert to track",
+        "convert_to_routes": "Convert to route file",
+        "convert_to_tracks": "Convert to track file",
         "new_segment": "New segment",
         "open": "Open...",
         "open_folder": "Open folder...",