diff --git a/ui/package-lock.json b/ui/package-lock.json
index c1ca30d1..22a7295e 100644
--- a/ui/package-lock.json
+++ b/ui/package-lock.json
@@ -9,8 +9,9 @@
       "version": "0.0.0",
       "hasInstallScript": true,
       "dependencies": {
-        "@cameleer/design-system": "^0.1.42",
+        "@cameleer/design-system": "^0.1.43",
         "@tanstack/react-query": "^5.90.21",
+        "js-yaml": "^4.1.1",
         "lucide-react": "^1.7.0",
         "openapi-fetch": "^0.17.0",
         "react": "^19.2.4",
@@ -23,6 +24,7 @@
       "devDependencies": {
         "@eslint/js": "^9.39.4",
         "@playwright/test": "^1.58.2",
+        "@types/js-yaml": "^4.0.9",
         "@types/node": "^24.12.0",
         "@types/react": "^19.2.14",
         "@types/react-dom": "^19.2.3",
@@ -279,9 +281,9 @@
       }
     },
     "node_modules/@cameleer/design-system": {
-      "version": "0.1.42",
-      "resolved": "https://gitea.siegeln.net/api/packages/cameleer/npm/%40cameleer%2Fdesign-system/-/0.1.42/design-system-0.1.42.tgz",
-      "integrity": "sha512-Cyy+2HsbBPLKRZaSGFxMUvIwI+g8ocdjcojFTGgtq5vrpE/8IYJLgxdtM9+eDoF2Zewk7MrBzfpNqjEYlQO3ng==",
+      "version": "0.1.43",
+      "resolved": "https://gitea.siegeln.net/api/packages/cameleer/npm/%40cameleer%2Fdesign-system/-/0.1.43/design-system-0.1.43.tgz",
+      "integrity": "sha512-eDCCFaS7DSRFRoWUWL1t256mdvIpL8XNbgRMgOWpZY7PWd162T1NESuzDn8PUAphC4jXtdLoHqQ+kihd+AA/hg==",
       "dependencies": {
         "lucide-react": "^1.7.0",
         "react": "^19.0.0",
@@ -1137,6 +1139,13 @@
       "dev": true,
       "license": "MIT"
     },
+    "node_modules/@types/js-yaml": {
+      "version": "4.0.9",
+      "resolved": "https://registry.npmjs.org/@types/js-yaml/-/js-yaml-4.0.9.tgz",
+      "integrity": "sha512-k4MGaQl5TGo/iipqb2UDG2UwjXziSWkh0uysQelTlJpX1qGlpUZYm8PnO4DxG1qBomtJUdYJ6qR6xdIah10JLg==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/@types/json-schema": {
       "version": "7.0.15",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.15.tgz",
@@ -1581,7 +1590,6 @@
       "version": "2.0.1",
       "resolved": "https://registry.npmjs.org/argparse/-/argparse-2.0.1.tgz",
       "integrity": "sha512-8+9WqebbFzpX9OR+Wa6O29asIogeRMzcGtAINdpMHHyAg10f05aSFVBbcEqGf/PXw1EjAZ+q2/bEBg3DvurK3Q==",
-      "dev": true,
       "license": "Python-2.0"
     },
     "node_modules/balanced-match": {
@@ -2501,7 +2509,6 @@
       "version": "4.1.1",
       "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-4.1.1.tgz",
       "integrity": "sha512-qQKT4zQxXl8lLwBtHMWwaTcGfFOZviOJet3Oy/xmGk2gZH677CJM9EvtfdSkgWcATZhj/55JZ0rmy3myCT5lsA==",
-      "dev": true,
       "license": "MIT",
       "dependencies": {
         "argparse": "^2.0.1"
diff --git a/ui/package.json b/ui/package.json
index 4950d849..653c8c23 100644
--- a/ui/package.json
+++ b/ui/package.json
@@ -15,8 +15,9 @@
     "postinstall": "node -e \"const fs=require('fs');fs.mkdirSync('public',{recursive:true});fs.copyFileSync('node_modules/@cameleer/design-system/assets/cameleer3-logo.svg','public/favicon.svg')\""
   },
   "dependencies": {
-    "@cameleer/design-system": "^0.1.42",
+    "@cameleer/design-system": "^0.1.43",
     "@tanstack/react-query": "^5.90.21",
+    "js-yaml": "^4.1.1",
     "lucide-react": "^1.7.0",
     "openapi-fetch": "^0.17.0",
     "react": "^19.2.4",
@@ -29,6 +30,7 @@
   "devDependencies": {
     "@eslint/js": "^9.39.4",
     "@playwright/test": "^1.58.2",
+    "@types/js-yaml": "^4.0.9",
     "@types/node": "^24.12.0",
     "@types/react": "^19.2.14",
     "@types/react-dom": "^19.2.3",
diff --git a/ui/src/components/EnvEditor.module.css b/ui/src/components/EnvEditor.module.css
new file mode 100644
index 00000000..61b8e4e9
--- /dev/null
+++ b/ui/src/components/EnvEditor.module.css
@@ -0,0 +1,91 @@
+.wrap {
+  display: flex;
+  flex-direction: column;
+  gap: 8px;
+}
+
+.toolbar {
+  display: flex;
+  align-items: center;
+  gap: 8px;
+}
+
+.actions {
+  margin-left: auto;
+  display: flex;
+  gap: 6px;
+}
+
+.tableBody {
+  display: flex;
+  flex-direction: column;
+  gap: 4px;
+}
+
+.row {
+  display: flex;
+  gap: 8px;
+  align-items: center;
+}
+
+.rowKey {
+  width: 220px;
+  flex-shrink: 0;
+}
+
+.rowValue {
+  flex: 1;
+}
+
+.deleteBtn {
+  background: none;
+  border: none;
+  color: var(--text-muted);
+  cursor: pointer;
+  font-size: 16px;
+  padding: 4px;
+  border-radius: var(--radius-sm);
+  transition: color 0.1s;
+}
+
+.deleteBtn:hover {
+  color: var(--error);
+}
+
+.deleteBtn:disabled {
+  opacity: 0.3;
+  cursor: default;
+}
+
+.textEditor {
+  width: 100%;
+  min-height: 180px;
+  padding: 10px 12px;
+  border: 1px solid var(--border);
+  border-radius: var(--radius-sm);
+  background: var(--bg-raised);
+  color: var(--text-primary);
+  font-family: var(--font-mono);
+  font-size: 12px;
+  line-height: 1.6;
+  resize: vertical;
+  outline: none;
+  transition: border-color 0.15s, box-shadow 0.15s;
+  tab-size: 2;
+}
+
+.textEditor:focus {
+  border-color: var(--amber);
+  box-shadow: 0 0 0 3px var(--amber-bg);
+}
+
+.importZone {
+  margin-top: 4px;
+}
+
+.empty {
+  padding: 24px;
+  text-align: center;
+  color: var(--text-faint);
+  font-size: 12px;
+}
diff --git a/ui/src/components/EnvEditor.tsx b/ui/src/components/EnvEditor.tsx
new file mode 100644
index 00000000..7a19d209
--- /dev/null
+++ b/ui/src/components/EnvEditor.tsx
@@ -0,0 +1,245 @@
+import { useState, useMemo, useCallback, useRef } from 'react';
+import { Button, Input, SegmentedTabs, FileInput } from '@cameleer/design-system';
+import type { FileInputHandle } from '@cameleer/design-system';
+import { Plus, Copy, Trash2, FileUp } from 'lucide-react';
+import styles from './EnvEditor.module.css';
+import {
+  type EnvEntry,
+  type Format,
+  parseText,
+  toText,
+  detectFormat,
+} from './env-convert';
+
+interface EnvEditorProps {
+  value: EnvEntry[];
+  onChange: (entries: EnvEntry[]) => void;
+  disabled?: boolean;
+}
+
+const FORMAT_TABS = [
+  { label: 'Table', value: 'table' as const },
+  { label: 'Properties', value: 'properties' as const },
+  { label: 'YAML', value: 'yaml' as const },
+  { label: '.env', value: 'env' as const },
+];
+
+type ViewMode = 'table' | Format;
+
+export function EnvEditor({ value, onChange, disabled }: EnvEditorProps) {
+  const [view, setView] = useState<ViewMode>('table');
+  const [textDraft, setTextDraft] = useState<string | null>(null);
+  const [showImport, setShowImport] = useState(false);
+  const fileRef = useRef<FileInputHandle>(null);
+
+  // When switching views, convert between formats
+  const handleViewChange = useCallback(
+    (next: string) => {
+      const nextView = next as ViewMode;
+
+      // If leaving a text view, commit the draft
+      if (textDraft !== null && view !== 'table') {
+        const parsed = parseText(textDraft, view as Format);
+        onChange(parsed);
+      }
+
+      // If entering a text view, generate text from current entries
+      if (nextView !== 'table') {
+        setTextDraft(toText(value, nextView as Format));
+      } else {
+        setTextDraft(null);
+      }
+
+      setView(nextView);
+    },
+    [view, textDraft, value, onChange],
+  );
+
+  // Text for current format (memoized from entries when no draft)
+  const displayText = useMemo(() => {
+    if (textDraft !== null) return textDraft;
+    if (view === 'table') return '';
+    return toText(value, view as Format);
+  }, [textDraft, value, view]);
+
+  // Commit text on blur
+  const handleTextBlur = useCallback(() => {
+    if (textDraft !== null && view !== 'table') {
+      const parsed = parseText(textDraft, view as Format);
+      onChange(parsed);
+    }
+  }, [textDraft, view, onChange]);
+
+  // Table row handlers
+  const updateRow = useCallback(
+    (i: number, field: 'key' | 'value', val: string) => {
+      const next = [...value];
+      next[i] = { ...next[i], [field]: val };
+      onChange(next);
+    },
+    [value, onChange],
+  );
+
+  const deleteRow = useCallback(
+    (i: number) => onChange(value.filter((_, j) => j !== i)),
+    [value, onChange],
+  );
+
+  const addRow = useCallback(
+    () => onChange([...value, { key: '', value: '' }]),
+    [value, onChange],
+  );
+
+  // Copy to clipboard
+  const handleCopy = useCallback(() => {
+    const text = view === 'table' ? toText(value, 'env') : displayText;
+    navigator.clipboard.writeText(text);
+  }, [view, value, displayText]);
+
+  // Clear all
+  const handleClear = useCallback(() => {
+    onChange([]);
+    setTextDraft(view !== 'table' ? '' : null);
+  }, [view, onChange]);
+
+  // File import
+  const handleImportFile = useCallback(() => {
+    const file = fileRef.current?.file;
+    if (!file) return;
+    const reader = new FileReader();
+    reader.onload = () => {
+      const text = reader.result as string;
+      const format = detectFormat(text);
+      const parsed = parseText(text, format);
+      // Merge with existing (dedupe by key, new values win)
+      const existing = new Map(value.map((e) => [e.key, e]));
+      for (const entry of parsed) {
+        existing.set(entry.key, entry);
+      }
+      const merged = Array.from(existing.values());
+      onChange(merged);
+      fileRef.current?.clear();
+      setShowImport(false);
+      // If in text view, update the draft
+      if (view !== 'table') {
+        setTextDraft(toText(merged, view as Format));
+      }
+    };
+    reader.readAsText(file);
+  }, [value, onChange, view]);
+
+  return (
+    <div className={styles.wrap}>
+      <div className={styles.toolbar}>
+        <SegmentedTabs
+          tabs={FORMAT_TABS}
+          active={view}
+          onChange={handleViewChange}
+        />
+        <div className={styles.actions}>
+          <Button
+            size="sm"
+            variant="ghost"
+            disabled={disabled}
+            onClick={() => setShowImport(!showImport)}
+            title="Import from file"
+          >
+            <FileUp size={14} />
+          </Button>
+          <Button
+            size="sm"
+            variant="ghost"
+            onClick={handleCopy}
+            title="Copy to clipboard"
+          >
+            <Copy size={14} />
+          </Button>
+          <Button
+            size="sm"
+            variant="ghost"
+            disabled={disabled}
+            onClick={handleClear}
+            title="Clear all"
+          >
+            <Trash2 size={14} />
+          </Button>
+        </div>
+      </div>
+
+      {showImport && (
+        <div className={styles.importZone}>
+          <div style={{ display: 'flex', gap: 8, alignItems: 'center' }}>
+            <div style={{ flex: 1 }}>
+              <FileInput
+                ref={fileRef}
+                accept=".properties,.yml,.yaml,.env,.cfg,.txt"
+                placeholder="Drop .properties, .yaml, or .env file"
+                icon={<FileUp size={16} />}
+              />
+            </div>
+            <Button size="sm" variant="primary" onClick={handleImportFile}>
+              Import
+            </Button>
+          </div>
+        </div>
+      )}
+
+      {view === 'table' ? (
+        <div className={styles.tableBody}>
+          {value.map((entry, i) => (
+            <div key={i} className={styles.row}>
+              <Input
+                disabled={disabled}
+                value={entry.key}
+                onChange={(e) => updateRow(i, 'key', e.target.value)}
+                className={styles.rowKey}
+                placeholder="KEY"
+              />
+              <Input
+                disabled={disabled}
+                value={entry.value}
+                onChange={(e) => updateRow(i, 'value', e.target.value)}
+                className={styles.rowValue}
+                placeholder="value"
+              />
+              <button
+                className={styles.deleteBtn}
+                disabled={disabled}
+                onClick={() => deleteRow(i)}
+              >
+                &times;
+              </button>
+            </div>
+          ))}
+          {value.length === 0 && !disabled && (
+            <div className={styles.empty}>
+              No variables configured. Add one or import from a file.
+            </div>
+          )}
+          {!disabled && (
+            <Button size="sm" variant="secondary" onClick={addRow}>
+              <Plus size={14} style={{ marginRight: 4 }} />
+              Add Variable
+            </Button>
+          )}
+        </div>
+      ) : (
+        <textarea
+          className={styles.textEditor}
+          value={displayText}
+          onChange={(e) => setTextDraft(e.target.value)}
+          onBlur={handleTextBlur}
+          disabled={disabled}
+          spellCheck={false}
+          placeholder={
+            view === 'yaml'
+              ? 'spring:\n  datasource:\n    url: jdbc:...'
+              : view === 'properties'
+                ? 'server.port=8080\nspring.datasource.url=jdbc:...'
+                : 'SERVER_PORT=8080\nSPRING_DATASOURCE_URL=jdbc:...'
+          }
+        />
+      )}
+    </div>
+  );
+}
diff --git a/ui/src/components/env-convert.ts b/ui/src/components/env-convert.ts
new file mode 100644
index 00000000..bb804625
--- /dev/null
+++ b/ui/src/components/env-convert.ts
@@ -0,0 +1,130 @@
+import yaml from 'js-yaml';
+
+export type EnvEntry = { key: string; value: string };
+
+export type Format = 'env' | 'properties' | 'yaml';
+
+/** Convert KEY=value env pairs to Spring-style properties (lowercase, _ -> .) */
+export function envToProperties(entries: EnvEntry[]): string {
+  return entries
+    .filter((e) => e.key.trim())
+    .map((e) => `${e.key.toLowerCase().replace(/_/g, '.')}=${e.value}`)
+    .join('\n');
+}
+
+/** Convert KEY=value env pairs to nested YAML */
+export function envToYaml(entries: EnvEntry[]): string {
+  const obj: Record<string, unknown> = {};
+  for (const { key, value } of entries) {
+    if (!key.trim()) continue;
+    const path = key.toLowerCase().replace(/_/g, '.').split('.');
+    let cur: Record<string, unknown> = obj;
+    for (let i = 0; i < path.length - 1; i++) {
+      if (typeof cur[path[i]] !== 'object' || cur[path[i]] === null) {
+        cur[path[i]] = {};
+      }
+      cur = cur[path[i]] as Record<string, unknown>;
+    }
+    cur[path[path.length - 1]] = value;
+  }
+  return yaml.dump(obj, { lineWidth: -1, noRefs: true }).trimEnd();
+}
+
+/** Convert KEY=value env pairs to .env format */
+export function envToEnvText(entries: EnvEntry[]): string {
+  return entries
+    .filter((e) => e.key.trim())
+    .map((e) => `${e.key}=${e.value}`)
+    .join('\n');
+}
+
+/** Normalize a key to UPPER_SNAKE_CASE */
+function toEnvKey(key: string): string {
+  return key.replace(/[.\-]/g, '_').toUpperCase();
+}
+
+/** Parse .properties text to env entries */
+export function parseProperties(text: string): EnvEntry[] {
+  const entries: EnvEntry[] = [];
+  for (const line of text.split('\n')) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith('#') || trimmed.startsWith('!')) continue;
+    const eq = trimmed.indexOf('=');
+    if (eq < 0) continue;
+    entries.push({
+      key: toEnvKey(trimmed.slice(0, eq).trim()),
+      value: trimmed.slice(eq + 1).trim(),
+    });
+  }
+  return entries;
+}
+
+/** Parse YAML text to env entries (flattens nested keys) */
+export function parseYaml(text: string): EnvEntry[] {
+  const doc = yaml.load(text);
+  if (!doc || typeof doc !== 'object') return [];
+  const entries: EnvEntry[] = [];
+  function walk(obj: Record<string, unknown>, prefix: string) {
+    for (const [k, v] of Object.entries(obj)) {
+      const path = prefix ? `${prefix}_${k}` : k;
+      if (v !== null && typeof v === 'object' && !Array.isArray(v)) {
+        walk(v as Record<string, unknown>, path);
+      } else {
+        entries.push({ key: toEnvKey(path), value: String(v ?? '') });
+      }
+    }
+  }
+  walk(doc as Record<string, unknown>, '');
+  return entries;
+}
+
+/** Parse .env text to env entries */
+export function parseEnvText(text: string): EnvEntry[] {
+  const entries: EnvEntry[] = [];
+  for (const line of text.split('\n')) {
+    const trimmed = line.trim();
+    if (!trimmed || trimmed.startsWith('#')) continue;
+    const eq = trimmed.indexOf('=');
+    if (eq < 0) continue;
+    entries.push({
+      key: trimmed.slice(0, eq).trim(),
+      value: trimmed.slice(eq + 1).trim(),
+    });
+  }
+  return entries;
+}
+
+/** Auto-detect format from text content */
+export function detectFormat(text: string): Format {
+  const lines = text.split('\n').filter((l) => l.trim() && !l.trim().startsWith('#'));
+  if (lines.length === 0) return 'env';
+
+  // YAML: has indented lines or lines ending with : (no =)
+  const hasIndent = lines.some((l) => /^\s{2,}\S/.test(l));
+  const hasColonNoEq = lines.some((l) => l.includes(':') && !l.includes('='));
+  if (hasIndent || (hasColonNoEq && !lines.some((l) => /^[A-Z_]+=/.test(l)))) return 'yaml';
+
+  // Properties: lowercase keys with dots
+  const hasPropertyKeys = lines.some((l) => /^[a-z][a-z0-9.\-]+=/.test(l));
+  if (hasPropertyKeys) return 'properties';
+
+  return 'env';
+}
+
+/** Parse text in a given format to env entries */
+export function parseText(text: string, format: Format): EnvEntry[] {
+  switch (format) {
+    case 'properties': return parseProperties(text);
+    case 'yaml': return parseYaml(text);
+    case 'env': return parseEnvText(text);
+  }
+}
+
+/** Convert env entries to text in a given format */
+export function toText(entries: EnvEntry[], format: Format): string {
+  switch (format) {
+    case 'properties': return envToProperties(entries);
+    case 'yaml': return envToYaml(entries);
+    case 'env': return envToEnvText(entries);
+  }
+}
diff --git a/ui/src/pages/AppsTab/AppsTab.tsx b/ui/src/pages/AppsTab/AppsTab.tsx
index 9926b063..a098d6b3 100644
--- a/ui/src/pages/AppsTab/AppsTab.tsx
+++ b/ui/src/pages/AppsTab/AppsTab.tsx
@@ -17,6 +17,7 @@ import {
   useToast,
 } from '@cameleer/design-system';
 import type { Column } from '@cameleer/design-system';
+import { EnvEditor } from '../../components/EnvEditor';
 import { useEnvironmentStore } from '../../api/environment-store';
 import { useEnvironments } from '../../api/queries/admin/environments';
 import {
@@ -366,19 +367,7 @@ function CreateAppView({ environments, selectedEnv }: { environments: Environmen
       {configTab === 'variables' && (
         <div className={sectionStyles.section}>
           <SectionHeader>Variables</SectionHeader>
-          {envVars.map((v, i) => (
-            <div key={i} className={styles.envVarRow}>
-              <Input disabled={busy} value={v.key} onChange={(e) => {
-                const next = [...envVars]; next[i] = { ...v, key: e.target.value }; setEnvVars(next);
-              }} className={styles.envVarKey} placeholder="KEY" />
-              <Input disabled={busy} value={v.value} onChange={(e) => {
-                const next = [...envVars]; next[i] = { ...v, value: e.target.value }; setEnvVars(next);
-              }} className={styles.envVarValue} placeholder="value" />
-              <button className={styles.envVarDelete} disabled={busy}
-                onClick={() => !busy && setEnvVars(envVars.filter((_, j) => j !== i))}>&times;</button>
-            </div>
-          ))}
-          <Button size="sm" variant="secondary" disabled={busy} onClick={() => setEnvVars([...envVars, { key: '', value: '' }])}>+ Add Variable</Button>
+          <EnvEditor value={envVars} onChange={setEnvVars} disabled={busy} />
         </div>
       )}
 
@@ -1015,22 +1004,7 @@ function ConfigSubTab({ app, environment }: { app: App; environment?: Environmen
       {configTab === 'variables' && (
         <div className={sectionStyles.section}>
           <SectionHeader>Variables</SectionHeader>
-          {envVars.map((v, i) => (
-            <div key={i} className={styles.envVarRow}>
-              <Input disabled={!editing} value={v.key} onChange={(e) => {
-                const next = [...envVars]; next[i] = { ...v, key: e.target.value }; setEnvVars(next);
-              }} className={styles.envVarKey} placeholder="KEY" />
-              <Input disabled={!editing} value={v.value} onChange={(e) => {
-                const next = [...envVars]; next[i] = { ...v, value: e.target.value }; setEnvVars(next);
-              }} className={styles.envVarValue} placeholder="value" />
-              <button className={styles.envVarDelete} disabled={!editing}
-                onClick={() => editing && setEnvVars(envVars.filter((_, j) => j !== i))}>&times;</button>
-            </div>
-          ))}
-          {editing && (
-            <Button size="sm" variant="secondary" onClick={() => setEnvVars([...envVars, { key: '', value: '' }])}>+ Add Variable</Button>
-          )}
-          {envVars.length === 0 && !editing && <EmptyState title="No variables" description="No environment variables configured." />}
+          <EnvEditor value={envVars} onChange={setEnvVars} disabled={!editing} />
         </div>
       )}