diff --git a/background-script.js b/background-script.js
index 955f5c2..e79b456 100644
--- a/background-script.js
+++ b/background-script.js
@@ -84,7 +84,7 @@ async function get_storage_or_default(name, fallback)
 async function refresh_json()
 {
     let custom_dicts = (await get_storage_or_default("custom_dicts", []));
-    json_dicts = [];
+    let new_json_dicts = [];
     for(let stored_dict of custom_dicts)
     {
         if(!stored_dict.enabled)
@@ -103,8 +103,9 @@ async function refresh_json()
                     add_json_spelling(dict, spelling, i);
             }
         } catch(e){}
-        json_dicts.push(dict);
+        new_json_dicts.push(dict);
     }
+    json_dicts = new_json_dicts;
 }
 
 async function migrate_legacy_then_refresh()
diff --git a/json_config.html b/json_config.html
index 1e5ea6e..7f96346 100644
--- a/json_config.html
+++ b/json_config.html
@@ -22,34 +22,104 @@ option.disabled
 div.buttons
 {
     display:flex;
-    width: 200px;
+    width: 300px;
     flex-direction: row;
     flex-wrap: wrap;
     justify-content: center;
 }
 div.buttons *
 {
-    width: 33%;
+    width: 33.3%;
+}
+div.buttons button.double
+{
+    width: 50%;
 }
 #delete
 {
     margin-top: 20px;
 }
+div.closed
+{
+    display: none;
+}
 </style>
 <script src="include/browser-polyfill.min.js" charset="UTF-8"></script>
 <script src="json_config.js" charset="UTF-8"></script>
 </head>
 
 <body lang="ja" visible="5">
-<select id=dicts size="10" style="width: 200px; box-sizing: border-box; border: none;">
-    <option value="wadai">Kenkyuusha/Wadai</option>
-    <option value="shinmeikai">Shinmeikai</option>
-    <option value="muramasa">Muramasa</option>
-</select>
-<div class=buttons>
-<button id=move_up>Move Up</button><button id=move_down>Move Down</button><button id=add disabled>Add Blank</button>
-<button id=import disabled>Import</button><button id=toggle>Toggle</button><button id=edit disabled>Edit</button>
-<button id=delete disabled>Delete</button></div>
+<div id=dict_manager>
+    <select id=dicts size="10" style="width: 300px; box-sizing: border-box; border: none;">
+        <option class=disabled>ローディング中</option>
+    </select>
+    <div class=buttons>
+        <button id=move_up>Move Up</button><button id=move_down>Move Down</button><button id=toggle>Toggle</button>
+        <button id=import class=double>Import</button><button id=export class=double>Export</button>
+        <button id=add class=double>Add Blank</button><button id=edit class=double>Edit</button>
+        <button id=delete>Delete</button>
+    </div>
+    <input type=file id=file_input style="display: none">
+</div>
+
+<div id=dict_editor class=closed>
+<input type=text id=edit_name value="" style="width: 300px"><button id=edit_apply>Apply</button><button id=edit_okay>Apply &amp; Close</button><button id=edit_cancel>Close</button>
+<textarea type=text id=edit_entries value="" style="width: 100%; height:calc(100vh - 200px)"></textarea>
+<div class=edit_explanation>
+<pre>
+Format (copy-paste-able):
+[
+  {
+    "r": "つるぎ",
+    "s": [
+      ""
+    ],
+    "l": [
+      "line one of a definition",
+      "line two of a definition",
+      "etc",
+      "last line of a definition"
+    ]
+  },
+  {
+    "r": "こだいしゅ",
+    "s": [
+      "古代種",
+      "古代しゅ"
+    ],
+    "l": [
+      "the ancients"
+    ]
+  }
+]
+Format (with comments, which break JSON parsing):
+[
+  { // entry one
+    "r": "つるぎ",
+    "s": [
+      "" // entries with no "spellings" still have a single, blank spelling
+    ], // comma
+    "l": [
+      "line one of a definition",
+      "line two of a definition",
+      "etc",
+      "last line of a definition" // no comma
+    ]
+  }, // comma
+  { // entry two
+    "r": "こだいしゅ",
+    "s": [
+      "古代種",
+      "古代しゅ" // no comma
+    ], // comma
+    "l": [
+      "the ancients" // no comma
+    ]
+  } // last entry, so no comma
+]
+</pre>
+</div>
+</div>
 </body>
 
 </html>
diff --git a/json_config.js b/json_config.js
index 30b86c6..46a525e 100644
--- a/json_config.js
+++ b/json_config.js
@@ -52,6 +52,91 @@ function toggle()
     
     save_dicts();
 }
+function add_blank()
+{
+    dicts.push({"name": "Unnamed", "entries": "[]", "enabled": true});
+    let list = document.getElementById("dicts");
+    
+    let option = document.createElement("option");
+    option.innerText = "Unnamed";
+    option.value = "Unnamed";
+    list.appendChild(option);
+    
+    save_dicts();
+}
+
+function errormessage(text)
+{
+    if(!text) return;
+    let mydiv = document.createElement("div");
+    mydiv.style = "background-color: #111; color: #CCC; font-family: Arial, sans-serif; font-size: 13px; width: 300px; border: 3px double red; position: fixed; right: 25px; top: 25px; z-index: 1000000000000000000000; padding: 5px; border-radius: 3px;"
+    mydiv.textContent = text;
+    document.body.appendChild(mydiv);
+    
+    function delete_later()
+    {
+        mydiv.remove();
+    }
+    
+    setTimeout(delete_later, 3000);
+}
+
+function edit()
+{
+    let list = document.getElementById("dicts");
+    let index = list.selectedIndex;
+    if(index == -1)
+        return;
+    if(dicts[index].entries.length > 100*1000)
+    {
+        errormessage("This dictionary is too large to edit within your web browser.");
+        return;
+    }
+    
+    let name = dicts[index].name;
+    let entries = JSON.stringify(JSON.parse(dicts[index].entries), null, 2);
+    console.log(entries);
+    
+    document.getElementById("dict_manager").className = "closed";
+    document.getElementById("dict_editor").className = "";
+    document.getElementById("edit_name").value = name;
+    document.getElementById("edit_entries").value = entries;
+    
+}
+function edit_cancel()
+{
+    document.getElementById("dict_manager").className = "";
+    document.getElementById("dict_editor").className = "closed";
+    document.getElementById("edit_entries").value = "";
+}
+function edit_apply()
+{
+    try
+    {
+        let list = document.getElementById("dicts");
+        let index = list.selectedIndex;
+        if(index != -1)
+        {
+            let new_name = document.getElementById("edit_name").value;
+            let new_json = JSON.stringify(JSON.parse(document.getElementById("edit_entries").value));
+            dicts[index].name = new_name;
+            dicts[index].entries = new_json;
+            list[index].value = new_name;
+            list[index].innerText = new_name;
+            
+            save_dicts();
+        }
+    }
+    catch(e)
+    {
+        errormessage(e);
+    }
+}
+function edit_okay()
+{
+    edit_apply();
+    edit_cancel();
+}
 
 function or_default(val, fallback)
 {
@@ -68,9 +153,9 @@ async function get_storage_or_default(name, fallback)
 async function insert_dicts()
 {
     let list = document.getElementById("dicts");
-    list.innerHTML = "";
     
     dicts = (await get_storage_or_default("custom_dicts", []));
+    list.innerHTML = "";
     
     for(let stored_dict of dicts)
     {
@@ -83,11 +168,118 @@ async function insert_dicts()
     }
 }
 
+let delete_timeout = undefined;
+
+function really_delete()
+{
+    console.log("on REALLY delete");
+    set_base_delete_mode();
+    
+    let list = document.getElementById("dicts");
+    let index = list.selectedIndex;
+    if(index == -1)
+        return;
+    console.log("gonna delete it!");
+    
+    dicts.splice(index, 1);
+    list.remove(index);
+    
+    save_dicts();
+}
+
+function ask_delete()
+{
+    document.getElementById("delete").onclick = really_delete;
+    document.getElementById("delete").innerText = "REALLY Delete";
+    delete_timeout = setTimeout(set_base_delete_mode, 5000);
+}
+
+function set_base_delete_mode()
+{
+    try
+    {
+        clearTimeout(delete_timeout);
+    } catch(e) {}
+    delete_timeout = undefined;
+    document.getElementById("delete").onclick = ask_delete;
+    document.getElementById("delete").innerText = "Delete";
+}
+
+function import_new()
+{
+    document.getElementById("file_input").click();
+}
+
+function export_dict()
+{
+    let list = document.getElementById("dicts");
+    let index = list.selectedIndex;
+    if(index == -1)
+        return;
+    
+    let name = dicts[index].name;
+    let obj = JSON.parse(dicts[index].entries);
+    obj.unshift(name);
+    
+    let blob = new Blob([JSON.stringify(obj, null, 2)], {type: 'text/plain'});
+    let url = window.URL.createObjectURL(blob);
+
+    let a = document.createElement("a");
+    a.href = url;
+    a.download = "nazeka_dict_export_"+name+".json";
+    document.body.appendChild(a);
+    a.click();
+    document.body.removeChild(a);
+    
+    window.URL.revokeObjectURL(url);
+}
+
+
 function buildpage()
 {
     document.getElementById("move_up").onclick = move_up;
     document.getElementById("move_down").onclick = move_down;
     document.getElementById("toggle").onclick = toggle;
+    document.getElementById("add").onclick = add_blank;
+    document.getElementById("edit").onclick = edit;
+    document.getElementById("delete").onclick = ask_delete;
+    document.getElementById("edit_apply").onclick = edit_apply;
+    document.getElementById("edit_okay").onclick = edit_okay;
+    document.getElementById("edit_cancel").onclick = edit_cancel;
+    
+    document.getElementById("import").onclick = import_new;
+    document.getElementById("export").onclick = export_dict;
+    
+    
+    document.getElementById("file_input").onchange = () =>
+    {
+        let fname = document.getElementById("file_input").files[0];
+        let reader = new FileReader();
+        reader.onload = async(e) =>
+        {
+            // FIXME: add asking for the unlimited storage permission
+            try
+            {
+                let myobj = JSON.parse(e.target.result);
+                let name = myobj.shift();
+                dicts.push({"name": name, "entries": JSON.stringify(myobj), "enabled": true});
+                
+                let option = document.createElement("option");
+                option.innerText = name;
+                option.value = name;
+                
+                let list = document.getElementById("dicts");
+                list.appendChild(option);
+                
+                save_dicts();
+            }
+            catch(e)
+            {
+                errormessage(e);
+            }
+        };
+        reader.readAsText(fname);
+    };
     
     insert_dicts();
 }