diff --git a/web/src/app.tsx b/web/src/app.tsx
index 952925d..1eaa60d 100644
--- a/web/src/app.tsx
+++ b/web/src/app.tsx
@@ -22,6 +22,10 @@ const ObjectEditForm = lazy(() =>
   import("./objects/object-edit-form").then((m) => ({ default: m.ObjectEditForm })),
 );
 
+const FieldsPage = lazy(() =>
+  import("./fields/fields-page").then((m) => ({ default: m.FieldsPage })),
+);
+
 function FormFallback() {
   return <div role="status" className="p-4 text-sm text-neutral-400">Loading…</div>;
 }
@@ -63,6 +67,14 @@ export function App() {
             </Route>
             <Route path="/authorities" element={<Navigate to="/authorities/person" replace />} />
             <Route path="/authorities/:kind" element={<AuthoritiesPage />} />
+            <Route
+              path="/fields"
+              element={
+                <Suspense fallback={<FormFallback />}>
+                  <FieldsPage />
+                </Suspense>
+              }
+            />
             <Route path="/" element={<Navigate to="/objects" replace />} />
           </Route>
         </Route>
diff --git a/web/src/fields/field-form.tsx b/web/src/fields/field-form.tsx
new file mode 100644
index 0000000..7d16bc0
--- /dev/null
+++ b/web/src/fields/field-form.tsx
@@ -0,0 +1,158 @@
+import { useState, type FormEvent } from "react";
+import { useTranslation } from "react-i18next";
+
+import type { components } from "../api/schema";
+import { useCreateFieldDefinition, useVocabularies } from "../api/queries";
+import { LabelEditor } from "../components/label-editor";
+import { Button } from "@/components/ui/button";
+import { Input } from "@/components/ui/input";
+import { Label } from "@/components/ui/label";
+import { Checkbox } from "@/components/ui/checkbox";
+
+type LabelInput = components["schemas"]["LabelInput"];
+
+const TYPES = ["text", "localized_text", "integer", "date", "boolean", "term", "authority"] as const;
+const KINDS = ["person", "organisation", "place"] as const;
+
+export function FieldForm() {
+  const { t } = useTranslation();
+  const create = useCreateFieldDefinition();
+  const { data: vocabularies } = useVocabularies();
+
+  const [key, setKey] = useState("");
+  const [labels, setLabels] = useState<LabelInput[]>([]);
+  const [dataType, setDataType] = useState<string>("text");
+  const [vocabularyId, setVocabularyId] = useState("");
+  const [authorityKind, setAuthorityKind] = useState("");
+  const [group, setGroup] = useState("");
+  const [required, setRequired] = useState(false);
+  const [error, setError] = useState(false);
+
+  const reset = () => {
+    setKey("");
+    setLabels([]);
+    setDataType("text");
+    setVocabularyId("");
+    setAuthorityKind("");
+    setGroup("");
+    setRequired(false);
+  };
+
+  const onSubmit = (event: FormEvent) => {
+    event.preventDefault();
+
+    const hasEn = labels.some((l) => l.lang === "en" && l.label);
+    const termNeedsVocab = dataType === "term" && !vocabularyId;
+
+    if (!key.trim() || !hasEn || termNeedsVocab) {
+      setError(true);
+      return;
+    }
+
+    setError(false);
+    create.mutate(
+      {
+        key: key.trim(),
+        data_type: dataType,
+        vocabulary_id: dataType === "term" ? vocabularyId : null,
+        authority_kind: dataType === "authority" ? authorityKind || null : null,
+        required,
+        group: group.trim() || null,
+        labels,
+      },
+      { onSuccess: reset },
+    );
+  };
+
+  return (
+    <form onSubmit={onSubmit} className="space-y-3 overflow-auto p-4">
+      <div className="text-sm font-medium">{t("fields.newField")}</div>
+
+      <div className="space-y-1">
+        <Label htmlFor="field-key">{t("fields.key")}</Label>
+        <Input id="field-key" value={key} onChange={(e) => setKey(e.target.value)} />
+      </div>
+
+      <LabelEditor value={labels} onChange={setLabels} />
+
+      <div className="space-y-1">
+        <Label htmlFor="field-type">{t("fields.type")}</Label>
+        <select
+          id="field-type"
+          value={dataType}
+          onChange={(e) => setDataType(e.target.value)}
+          className="w-full rounded border px-2 py-1 text-sm"
+        >
+          {TYPES.map((type) => (
+            <option key={type} value={type}>
+              {t(`fields.types.${type}`)}
+            </option>
+          ))}
+        </select>
+      </div>
+
+      {dataType === "term" && (
+        <div className="space-y-1">
+          <Label htmlFor="field-vocab">{t("fields.vocabulary")}</Label>
+          <select
+            id="field-vocab"
+            value={vocabularyId}
+            onChange={(e) => setVocabularyId(e.target.value)}
+            className="w-full rounded border px-2 py-1 text-sm"
+          >
+            <option value="">{t("form.selectPlaceholder")}</option>
+            {vocabularies?.map((vocab) => (
+              <option key={vocab.id} value={vocab.id}>
+                {vocab.key}
+              </option>
+            ))}
+          </select>
+        </div>
+      )}
+
+      {dataType === "authority" && (
+        <div className="space-y-1">
+          <Label htmlFor="field-kind">{t("fields.authorityKind")}</Label>
+          <select
+            id="field-kind"
+            value={authorityKind}
+            onChange={(e) => setAuthorityKind(e.target.value)}
+            className="w-full rounded border px-2 py-1 text-sm"
+          >
+            <option value="">{t("fields.anyKind")}</option>
+            {KINDS.map((kind) => (
+              <option key={kind} value={kind}>
+                {t(`authorities.${kind}`)}
+              </option>
+            ))}
+          </select>
+        </div>
+      )}
+
+      <div className="space-y-1">
+        <Label htmlFor="field-group">{t("fields.group")}</Label>
+        <Input id="field-group" value={group} onChange={(e) => setGroup(e.target.value)} />
+      </div>
+
+      <label className="flex items-center gap-2 text-sm">
+        <Checkbox checked={required} onCheckedChange={(checked) => setRequired(checked === true)} />
+        {t("fields.required")}
+      </label>
+
+      {error && (
+        <p role="alert" className="text-xs text-red-600">
+          {t("form.required")}
+        </p>
+      )}
+      {create.isError && (
+        <p role="alert" className="text-xs text-red-600">
+          {t("form.rejected")}
+        </p>
+      )}
+
+      <Button type="submit" size="sm" disabled={create.isPending}>
+        {t("fields.create")}
+      </Button>
+    </form>
+  );
+}
diff --git a/web/src/fields/field-list.tsx b/web/src/fields/field-list.tsx
new file mode 100644
index 0000000..6bee9d1
--- /dev/null
+++ b/web/src/fields/field-list.tsx
@@ -0,0 +1,70 @@
+import { useTranslation } from "react-i18next";
+
+import type { components } from "../api/schema";
+import { useFieldDefinitions } from "../api/queries";
+import { Skeleton } from "@/components/ui/skeleton";
+
+type FieldDefinitionView = components["schemas"]["FieldDefinitionView"];
+
+function labelText(labels: FieldDefinitionView["labels"], lang: string): string {
+  return (
+    labels.find((l) => l.lang === lang)?.label ??
+    labels.find((l) => l.lang === "en")?.label ??
+    labels[0]?.label ??
+    ""
+  );
+}
+
+export function FieldList() {
+  const { t, i18n } = useTranslation();
+  const { data, isLoading, isError } = useFieldDefinitions();
+  const lang = i18n.language.startsWith("sv") ? "sv" : "en";
+
+  if (isLoading) {
+    return (
+      <div className="space-y-2 p-3">
+        {Array.from({ length: 6 }).map((_, i) => (
+          <Skeleton key={i} className="h-9 w-full" />
+        ))}
+      </div>
+    );
+  }
+
+  if (isError) return <p className="p-4 text-sm text-red-600">{t("fields.loadError")}</p>;
+  if (!data || data.length === 0)
+    return <p className="p-4 text-sm text-neutral-500">{t("fields.empty")}</p>;
+
+  const groups = new Map<string, FieldDefinitionView[]>();
+
+  for (const def of data) {
+    const key = def.group?.trim() ? def.group : t("fields.other");
+    const bucket = groups.get(key) ?? [];
+
+    bucket.push(def);
+    groups.set(key, bucket);
+  }
+
+  return (
+    <ul className="overflow-auto">
+      {[...groups.entries()].map(([group, defs]) => (
+        <li key={group}>
+          <div className="border-b bg-neutral-50 px-3 py-1 text-xs font-medium uppercase tracking-wide text-neutral-500">
+            {group}
+          </div>
+          <ul>
+            {defs.map((def) => (
+              <li key={def.key} className="flex items-center gap-2 border-b px-3 py-2 text-sm">
+                <span className="font-medium">{labelText(def.labels, lang)}</span>
+                <span className="text-xs text-neutral-400">{def.key}</span>
+                <span className="rounded bg-neutral-100 px-1.5 py-0.5 text-xs text-neutral-600">
+                  {t(`fields.types.${def.data_type}`)}
+                </span>
+                {def.required && <span className="text-xs text-red-600">*</span>}
+              </li>
+            ))}
+          </ul>
+        </li>
+      ))}
+    </ul>
+  );
+}
diff --git a/web/src/fields/fields-page.tsx b/web/src/fields/fields-page.tsx
new file mode 100644
index 0000000..f845bf9
--- /dev/null
+++ b/web/src/fields/fields-page.tsx
@@ -0,0 +1,15 @@
+import { FieldList } from "./field-list";
+import { FieldForm } from "./field-form";
+
+export function FieldsPage() {
+  return (
+    <div className="grid h-full grid-cols-[20rem_1fr]">
+      <div className="overflow-hidden border-r">
+        <FieldList />
+      </div>
+      <div className="overflow-hidden">
+        <FieldForm />
+      </div>
+    </div>
+  );
+}
diff --git a/web/src/fields/fields.test.tsx b/web/src/fields/fields.test.tsx
new file mode 100644
index 0000000..87fdceb
--- /dev/null
+++ b/web/src/fields/fields.test.tsx
@@ -0,0 +1,72 @@
+import { expect, test } from "vitest";
+import { screen, waitFor } from "@testing-library/react";
+import userEvent from "@testing-library/user-event";
+import { http, HttpResponse } from "msw";
+import { Route, Routes } from "react-router-dom";
+
+import { server } from "../test/server";
+import { renderApp } from "../test/render";
+import { FieldsPage } from "./fields-page";
+
+function tree() {
+  return (
+    <Routes>
+      <Route path="/fields" element={<FieldsPage />} />
+    </Routes>
+  );
+}
+
+test("lists field definitions grouped, with an Other heading for ungrouped", async () => {
+  renderApp(tree(), { route: "/fields" });
+  expect(await screen.findByText("Inscription")).toBeInTheDocument();
+  expect(screen.getByText(/^Description$/i)).toBeInTheDocument();
+  expect(screen.getByText(/^Other$/i)).toBeInTheDocument();
+});
+
+test("creates a text field — posts the body and clears the key input", async () => {
+  let body: { key: string; data_type: string } | undefined;
+
+  server.use(
+    http.post("/api/admin/field-definitions", async ({ request }) => {
+      body = (await request.json()) as { key: string; data_type: string };
+      return HttpResponse.json({ key: "notes" }, { status: 201 });
+    }),
+  );
+  renderApp(tree(), { route: "/fields" });
+
+  await userEvent.type(screen.getByLabelText(/^key$/i), "notes");
+  await userEvent.type(screen.getByLabelText(/label \(en\)/i), "Notes");
+  await userEvent.click(screen.getByRole("button", { name: /create field/i }));
+
+  await waitFor(() => expect(body?.key).toBe("notes"));
+  expect(body?.data_type).toBe("text");
+  await waitFor(() => expect(screen.getByLabelText(/^key$/i)).toHaveValue(""));
+});
+
+test("selecting Term reveals the vocabulary picker and blocks submit until chosen", async () => {
+  let posted = false;
+
+  server.use(
+    http.post("/api/admin/field-definitions", () => {
+      posted = true;
+      return HttpResponse.json({ key: "x" }, { status: 201 });
+    }),
+  );
+  renderApp(tree(), { route: "/fields" });
+
+  await userEvent.type(screen.getByLabelText(/^key$/i), "material");
+  await userEvent.type(screen.getByLabelText(/label \(en\)/i), "Material");
+  await userEvent.selectOptions(screen.getByLabelText(/^type$/i), "term");
+
+  const vocab = await screen.findByLabelText(/^vocabulary$/i);
+
+  expect(vocab).toBeInTheDocument();
+
+  await userEvent.click(screen.getByRole("button", { name: /create field/i }));
+  expect(await screen.findByRole("alert")).toBeInTheDocument();
+  expect(posted).toBe(false);
+
+  await userEvent.selectOptions(vocab, "v-material");
+  await userEvent.click(screen.getByRole("button", { name: /create field/i }));
+  await waitFor(() => expect(posted).toBe(true));
+});
diff --git a/web/src/i18n/en.json b/web/src/i18n/en.json
index bafe24b..a23cc69 100644
--- a/web/src/i18n/en.json
+++ b/web/src/i18n/en.json
@@ -29,6 +29,22 @@
     "resultCount_other": "{{count}} results",
     "selectPrompt": "Select a result to see the full record"
   },
+  "fields": {
+    "title": "Fields",
+    "newField": "New field definition",
+    "key": "Key",
+    "type": "Type",
+    "vocabulary": "Vocabulary",
+    "authorityKind": "Authority kind",
+    "anyKind": "Any",
+    "group": "Group",
+    "required": "Required",
+    "create": "Create field",
+    "empty": "No field definitions yet",
+    "loadError": "Could not load",
+    "other": "Other",
+    "types": { "text": "Text", "localized_text": "Localized text", "integer": "Integer", "date": "Date", "boolean": "Boolean", "term": "Term", "authority": "Authority" }
+  },
   "publish": {
     "heading": "Visibility",
     "advanceInternal": "Advance to internal",
diff --git a/web/src/i18n/sv.json b/web/src/i18n/sv.json
index 2477583..e33f294 100644
--- a/web/src/i18n/sv.json
+++ b/web/src/i18n/sv.json
@@ -29,6 +29,22 @@
     "resultCount_other": "{{count}} träffar",
     "selectPrompt": "Välj en träff för att se hela posten"
   },
+  "fields": {
+    "title": "Fält",
+    "newField": "Nytt fältdefinition",
+    "key": "Nyckel",
+    "type": "Typ",
+    "vocabulary": "Vokabulär",
+    "authorityKind": "Auktoritetstyp",
+    "anyKind": "Alla",
+    "group": "Grupp",
+    "required": "Obligatoriskt",
+    "create": "Skapa fält",
+    "empty": "Inga fältdefinitioner ännu",
+    "loadError": "Kunde inte ladda",
+    "other": "Övrigt",
+    "types": { "text": "Text", "localized_text": "Lokaliserad text", "integer": "Heltal", "date": "Datum", "boolean": "Boolesk", "term": "Term", "authority": "Auktoritet" }
+  },
   "publish": {
     "heading": "Synlighet",
     "advanceInternal": "Gör intern",
diff --git a/web/src/shell/app-shell.test.tsx b/web/src/shell/app-shell.test.tsx
index 9cc1ca2..5e60cd2 100644
--- a/web/src/shell/app-shell.test.tsx
+++ b/web/src/shell/app-shell.test.tsx
@@ -29,9 +29,9 @@ test("shows active and disabled nav and renders the outlet", async () => {
   renderApp(tree(), { route: "/objects" });
   expect(await screen.findByText("objects outlet")).toBeInTheDocument();
   expect(screen.getByRole("link", { name: /objects/i })).toBeInTheDocument();
-  // fields is still disabled; search is now a link
+  // fields and search are now links
   expect(screen.getByRole("link", { name: /search/i })).toBeInTheDocument();
-  expect(screen.getByRole("button", { name: /fields/i })).toBeDisabled();
+  expect(screen.getByRole("link", { name: /fields/i })).toBeInTheDocument();
 });
 
 test("language switch toggles to Swedish", async () => {
diff --git a/web/src/shell/app-shell.tsx b/web/src/shell/app-shell.tsx
index 4a1aa13..43fb481 100644
--- a/web/src/shell/app-shell.tsx
+++ b/web/src/shell/app-shell.tsx
@@ -5,8 +5,6 @@ import { useLogout } from "../api/queries";
 import { Button } from "@/components/ui/button";
 import { LangSwitch } from "./lang-switch";
 
-const DISABLED_NAV = ["fields"] as const;
-
 export function AppShell() {
   const { t } = useTranslation();
   const navigate = useNavigate();
@@ -54,16 +52,14 @@ export function AppShell() {
           >
             {t("nav.search")}
           </NavLink>
-          {DISABLED_NAV.map((key) => (
-            <button
-              key={key}
-              disabled
-              title={t("nav.soon")}
-              className="block w-full cursor-not-allowed rounded px-2 py-1 text-left text-neutral-400"
-            >
-              {t(`nav.${key}`)}
-            </button>
-          ))}
+          <NavLink
+            to="/fields"
+            className={({ isActive }) =>
+              `block rounded px-2 py-1 ${isActive ? "bg-neutral-200 font-medium" : ""}`
+            }
+          >
+            {t("nav.fields")}
+          </NavLink>
         </nav>
       </aside>
       <div className="flex flex-1 flex-col">