backend/app.py

@@ -10,7 +10,15 @@ from util.db_config import is_configured, load_config, test_connection
 from util.setup_routes import setup_blueprint
 from util.limiter import limiter
 from auth import auth_bp
-from tools import md5_blueprint
+from tools import (
+    md5_blueprint,
+    hasher_blueprint,
+    base64_blueprint,
+    jwt_decoder_blueprint,
+    passwordgen_blueprint,
+    timestamp_blueprint,
+    textdiff_blueprint,
+)
 from admin import admin_bp
 
 app = Flask(__name__, template_folder="templates")
@@ -20,6 +28,12 @@ limiter.init_app(app)
 app.register_blueprint(setup_blueprint)
 app.register_blueprint(auth_bp)
 app.register_blueprint(md5_blueprint)
+app.register_blueprint(hasher_blueprint)
+app.register_blueprint(base64_blueprint)
+app.register_blueprint(jwt_decoder_blueprint)
+app.register_blueprint(passwordgen_blueprint)
+app.register_blueprint(timestamp_blueprint)
+app.register_blueprint(textdiff_blueprint)
 app.register_blueprint(admin_bp)
 
 # 🌐 React-Frontend ausliefern

backend/requirements.txt

@@ -4,4 +4,5 @@ flask-limiter
 mysql-connector-python
 werkzeug>=2.3
 PyJWT
+bcrypt
 python-dotenv

backend/tools/__init__.py

@@ -1 +1,7 @@
 from .md5 import md5_blueprint
+from .hasher import hasher_blueprint
+from .base64tool import base64_blueprint
+from .jwtdecoder import jwt_decoder_blueprint
+from .passwordgen import passwordgen_blueprint
+from .timestamp import timestamp_blueprint
+from .textdiff import textdiff_blueprint

backend/tools/base64tool.py

@@ -0,0 +1,38 @@
+from flask import Blueprint, request, jsonify
+import base64
+from util.logger import logger
+from auth.token import verify_token
+
+base64_blueprint = Blueprint('base64_tool', __name__)
+
+
+@base64_blueprint.route('/api/base64/encode', methods=['POST'])
+def encode():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        text = data.get("text", "")
+        result = base64.b64encode(text.encode()).decode()
+        logger.info(f"Base64 kodiert von {user['username']}")
+        return jsonify({"result": result})
+    except Exception as e:
+        logger.error(f"Fehler Base64 encode: {e}")
+        return jsonify({"message": "Fehler beim Kodieren"}), 500
+
+
+@base64_blueprint.route('/api/base64/decode', methods=['POST'])
+def decode():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        text = data.get("text", "").strip()
+        result = base64.b64decode(text.encode()).decode('utf-8')
+        logger.info(f"Base64 dekodiert von {user['username']}")
+        return jsonify({"result": result})
+    except Exception as e:
+        logger.error(f"Fehler Base64 decode: {e}")
+        return jsonify({"message": "Ungültiger Base64-Input"}), 400

backend/tools/hasher.py

@@ -0,0 +1,39 @@
+from flask import Blueprint, request, jsonify
+import hashlib
+import bcrypt
+from util.logger import logger
+from auth.token import verify_token
+
+hasher_blueprint = Blueprint('hasher_tool', __name__)
+
+
+@hasher_blueprint.route('/api/hash/sha256', methods=['POST'])
+def hash_sha256():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        text = data.get("text", "")
+        result = hashlib.sha256(text.encode()).hexdigest()
+        logger.info(f"SHA256 erstellt von {user['username']}")
+        return jsonify({"sha256": result, "by": user['username']})
+    except Exception as e:
+        logger.error(f"Fehler SHA256: {e}")
+        return jsonify({"message": "Fehler beim Hashen"}), 500
+
+
+@hasher_blueprint.route('/api/hash/bcrypt', methods=['POST'])
+def hash_bcrypt():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        text = data.get("text", "")
+        hashed = bcrypt.hashpw(text.encode(), bcrypt.gensalt()).decode()
+        logger.info(f"bcrypt erstellt von {user['username']}")
+        return jsonify({"bcrypt": hashed, "by": user['username']})
+    except Exception as e:
+        logger.error(f"Fehler bcrypt: {e}")
+        return jsonify({"message": "Fehler beim Hashen"}), 500

backend/tools/jwtdecoder.py

@@ -0,0 +1,29 @@
+from flask import Blueprint, request, jsonify
+import jwt
+from datetime import datetime, timezone
+from util.logger import logger
+from auth.token import verify_token
+
+jwt_decoder_blueprint = Blueprint('jwt_decoder_tool', __name__)
+
+
+@jwt_decoder_blueprint.route('/api/jwt/decode', methods=['POST'])
+def decode_jwt():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        token = data.get("token", "").strip()
+        header = jwt.get_unverified_header(token)
+        payload = jwt.decode(token, options={"verify_signature": False})
+
+        expired = False
+        if "exp" in payload:
+            expired = payload["exp"] < datetime.now(timezone.utc).timestamp()
+
+        logger.info(f"JWT dekodiert von {user['username']}")
+        return jsonify({"header": header, "payload": payload, "expired": expired})
+    except Exception as e:
+        logger.error(f"Fehler JWT decode: {e}")
+        return jsonify({"message": "Ungültiger JWT Token"}), 400

backend/tools/passwordgen.py

@@ -0,0 +1,41 @@
+from flask import Blueprint, request, jsonify
+import secrets
+import string
+from util.logger import logger
+from auth.token import verify_token
+
+passwordgen_blueprint = Blueprint('passwordgen_tool', __name__)
+
+
+@passwordgen_blueprint.route('/api/password/generate', methods=['POST'])
+def generate_password():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        length = min(max(int(data.get("length", 16)), 8), 64)
+        use_uppercase = data.get("uppercase", True)
+        use_lowercase = data.get("lowercase", True)
+        use_numbers = data.get("numbers", True)
+        use_symbols = data.get("symbols", False)
+
+        charset = ""
+        if use_uppercase:
+            charset += string.ascii_uppercase
+        if use_lowercase:
+            charset += string.ascii_lowercase
+        if use_numbers:
+            charset += string.digits
+        if use_symbols:
+            charset += string.punctuation
+
+        if not charset:
+            return jsonify({"message": "Mindestens ein Zeichensatz muss ausgewählt sein"}), 400
+
+        password = ''.join(secrets.choice(charset) for _ in range(length))
+        logger.info(f"Passwort generiert von {user['username']}")
+        return jsonify({"password": password})
+    except Exception as e:
+        logger.error(f"Fehler Passwortgenerator: {e}")
+        return jsonify({"message": "Fehler beim Generieren"}), 500

backend/tools/textdiff.py

@@ -0,0 +1,37 @@
+from flask import Blueprint, request, jsonify
+import difflib
+from util.logger import logger
+from auth.token import verify_token
+
+textdiff_blueprint = Blueprint('textdiff_tool', __name__)
+
+
+@textdiff_blueprint.route('/api/text/diff', methods=['POST'])
+def text_diff():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        text1 = data.get("text1", "")
+        text2 = data.get("text2", "")
+
+        lines1 = text1.splitlines(keepends=True)
+        lines2 = text2.splitlines(keepends=True)
+
+        result = []
+        for line in difflib.unified_diff(lines1, lines2, lineterm=''):
+            if line.startswith('+++') or line.startswith('---') or line.startswith('@@'):
+                continue
+            if line.startswith('+'):
+                result.append({"type": "added", "text": line[1:]})
+            elif line.startswith('-'):
+                result.append({"type": "removed", "text": line[1:]})
+            else:
+                result.append({"type": "unchanged", "text": line[1:] if line.startswith(' ') else line})
+
+        logger.info(f"Text-Diff erstellt von {user['username']}")
+        return jsonify({"diff": result})
+    except Exception as e:
+        logger.error(f"Fehler Text-Diff: {e}")
+        return jsonify({"message": "Fehler beim Vergleich"}), 500

backend/tools/timestamp.py

@@ -0,0 +1,46 @@
+from flask import Blueprint, request, jsonify
+from datetime import datetime, timezone
+from util.logger import logger
+from auth.token import verify_token
+
+timestamp_blueprint = Blueprint('timestamp_tool', __name__)
+
+_DATE_FORMATS = [
+    "%Y-%m-%dT%H:%M:%S",
+    "%Y-%m-%d %H:%M:%S",
+    "%Y-%m-%d",
+    "%d.%m.%Y %H:%M:%S",
+    "%d.%m.%Y",
+]
+
+
+@timestamp_blueprint.route('/api/timestamp/convert', methods=['POST'])
+def convert_timestamp():
+    user = verify_token()
+    if not user:
+        return jsonify({"message": "Nicht autorisiert"}), 401
+    try:
+        data = request.get_json()
+        value = data.get("value", "").strip()
+        direction = data.get("direction", "unix_to_date")
+
+        if direction == "unix_to_date":
+            ts = float(value)
+            dt_utc = datetime.fromtimestamp(ts, tz=timezone.utc)
+            return jsonify({"utc": dt_utc.isoformat(), "unix": int(ts)})
+
+        dt = None
+        for fmt in _DATE_FORMATS:
+            try:
+                dt = datetime.strptime(value, fmt).replace(tzinfo=timezone.utc)
+                break
+            except ValueError:
+                continue
+        if dt is None:
+            return jsonify({"message": "Ungültiges Datumsformat"}), 400
+
+        logger.info(f"Timestamp konvertiert von {user['username']}")
+        return jsonify({"unix": int(dt.timestamp()), "utc": dt.isoformat()})
+    except Exception as e:
+        logger.error(f"Fehler Timestamp: {e}")
+        return jsonify({"message": "Ungültiger Wert"}), 400

frontend/src/App.jsx

@@ -3,6 +3,12 @@ import { BrowserRouter, Navigate, Route, Routes } from 'react-router-dom';
 import LoginForm from './components/LoginForm';
 //import RegisterForm from './components/RegisterForm';
 import Md5Tool from './components/Md5Tool';
+import HasherTool from './components/HasherTool';
+import Base64Tool from './components/Base64Tool';
+import JwtDecoderTool from './components/JwtDecoderTool';
+import PasswordGenTool from './components/PasswordGenTool';
+import TimestampTool from './components/TimestampTool';
+import TextDiffTool from './components/TextDiffTool';
 import NavBar from './components/NavBar';
 import ToolOverview from './components/ToolOverview';
 import AdminDashboard from './components/AdminDashboard';
@@ -30,6 +36,12 @@ function App() {
             <Route path="/login" element={<LoginForm />} />
             {/*<Route path="/register" element={<RegisterForm />} />*/}
             <Route path="/tools/md5"       element={isLoggedIn ? <Md5Tool />        : <Navigate to="/login" />} />
+            <Route path="/tools/hasher"    element={isLoggedIn ? <HasherTool />     : <Navigate to="/login" />} />
+            <Route path="/tools/base64"    element={isLoggedIn ? <Base64Tool />     : <Navigate to="/login" />} />
+            <Route path="/tools/jwt"       element={isLoggedIn ? <JwtDecoderTool /> : <Navigate to="/login" />} />
+            <Route path="/tools/password"  element={isLoggedIn ? <PasswordGenTool />: <Navigate to="/login" />} />
+            <Route path="/tools/timestamp" element={isLoggedIn ? <TimestampTool />  : <Navigate to="/login" />} />
+            <Route path="/tools/textdiff"  element={isLoggedIn ? <TextDiffTool />   : <Navigate to="/login" />} />
             <Route
               path="/admin"
               element={

frontend/src/components/Base64Tool.jsx

@@ -0,0 +1,65 @@
+import { useState } from 'react';
+import axios from '../services/api';
+
+const resultBox = {
+  marginTop: '12px',
+  padding: '12px 14px',
+  background: 'var(--surface-2)',
+  border: '1px solid var(--border)',
+  borderRadius: '12px',
+  display: 'flex',
+  alignItems: 'center',
+  gap: '10px',
+  justifyContent: 'space-between',
+};
+
+function Base64Tool() {
+  const [input, setInput] = useState('');
+  const [result, setResult] = useState('');
+  const [error, setError] = useState('');
+  const [copied, setCopied] = useState(false);
+
+  const request = async (endpoint) => {
+    setError('');
+    setResult('');
+    try {
+      const res = await axios.post(endpoint, { text: input });
+      setResult(res.data.result);
+    } catch (err) {
+      setError(err.response?.data?.message || 'Fehler');
+    }
+  };
+
+  const copy = () => {
+    navigator.clipboard.writeText(result);
+    setCopied(true);
+    setTimeout(() => setCopied(false), 1500);
+  };
+
+  return (
+    <div className="main-content">
+      <h2>Base64 Encoder / Decoder</h2>
+      <input
+        type="text"
+        value={input}
+        onChange={(e) => { setInput(e.target.value); setResult(''); setError(''); }}
+        placeholder="Text eingeben"
+      />
+      <button onClick={() => request('/api/base64/encode')}>Encode</button>
+      <button onClick={() => request('/api/base64/decode')}>Decode</button>
+      {error && <p className="error">{error}</p>}
+      {result && (
+        <div style={resultBox}>
+          <span style={{ wordBreak: 'break-all', color: 'var(--text)', fontFamily: 'monospace', fontSize: '0.9rem' }}>
+            {result}
+          </span>
+          <button className="ghost" onClick={copy} style={{ flexShrink: 0, margin: 0 }}>
+            {copied ? 'Kopiert!' : 'Kopieren'}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default Base64Tool;

frontend/src/components/HasherTool.jsx

@@ -0,0 +1,68 @@
+import { useState } from 'react';
+import axios from '../services/api';
+
+const resultBox = {
+  marginTop: '12px',
+  padding: '12px 14px',
+  background: 'var(--surface-2)',
+  border: '1px solid var(--border)',
+  borderRadius: '12px',
+  display: 'flex',
+  alignItems: 'center',
+  gap: '10px',
+  justifyContent: 'space-between',
+};
+
+function HasherTool() {
+  const [input, setInput] = useState('');
+  const [algo, setAlgo] = useState('sha256');
+  const [result, setResult] = useState('');
+  const [copied, setCopied] = useState(false);
+
+  const handleHash = async () => {
+    try {
+      const res = await axios.post(`/api/hash/${algo}`, { text: input });
+      setResult(res.data[algo]);
+    } catch {
+      alert('Fehler beim Hashen');
+    }
+  };
+
+  const copy = () => {
+    navigator.clipboard.writeText(result);
+    setCopied(true);
+    setTimeout(() => setCopied(false), 1500);
+  };
+
+  return (
+    <div className="main-content">
+      <h2>SHA256 / bcrypt Hasher</h2>
+      <p style={{ color: 'var(--accent)', fontSize: '0.875rem', marginBottom: '0.75rem' }}>
+        <strong>Hinweis:</strong> bcrypt ist sicher für Passwörter – SHA256 für Datenintegrität.
+      </p>
+      <input
+        type="text"
+        value={input}
+        onChange={(e) => { setInput(e.target.value); setResult(''); }}
+        placeholder="Text eingeben"
+      />
+      <select value={algo} onChange={(e) => { setAlgo(e.target.value); setResult(''); }} style={{ marginTop: '8px' }}>
+        <option value="sha256">SHA256</option>
+        <option value="bcrypt">bcrypt</option>
+      </select>
+      <button onClick={handleHash}>Hash berechnen</button>
+      {result && (
+        <div style={resultBox}>
+          <span style={{ wordBreak: 'break-all', color: 'var(--text)', fontFamily: 'monospace', fontSize: '0.9rem' }}>
+            {result}
+          </span>
+          <button className="ghost" onClick={copy} style={{ flexShrink: 0, margin: 0 }}>
+            {copied ? 'Kopiert!' : 'Kopieren'}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default HasherTool;

frontend/src/components/JwtDecoderTool.jsx

@@ -0,0 +1,69 @@
+import { useState } from 'react';
+import axios from '../services/api';
+
+const sectionBox = {
+  marginTop: '12px',
+  padding: '14px',
+  background: 'var(--surface-2)',
+  border: '1px solid var(--border)',
+  borderRadius: '12px',
+};
+
+function JwtDecoderTool() {
+  const [input, setInput] = useState('');
+  const [decoded, setDecoded] = useState(null);
+  const [error, setError] = useState('');
+
+  const handleDecode = async () => {
+    setError('');
+    setDecoded(null);
+    try {
+      const res = await axios.post('/api/jwt/decode', { token: input });
+      setDecoded(res.data);
+    } catch (err) {
+      setError(err.response?.data?.message || 'Ungültiger JWT');
+    }
+  };
+
+  return (
+    <div className="main-content">
+      <h2>JWT Decoder</h2>
+      <p style={{ color: 'var(--accent)', fontSize: '0.875rem', marginBottom: '0.75rem' }}>
+        <strong>Hinweis:</strong> Dieser Decoder verifiziert keine Signatur – nur zur Analyse.
+      </p>
+      <textarea
+        rows={3}
+        value={input}
+        onChange={(e) => { setInput(e.target.value); setDecoded(null); setError(''); }}
+        placeholder="JWT Token einfügen"
+        style={{ resize: 'vertical', fontFamily: 'monospace', fontSize: '0.85rem' }}
+      />
+      <button onClick={handleDecode}>Dekodieren</button>
+      {error && <p className="error">{error}</p>}
+      {decoded && (
+        <>
+          <div style={sectionBox}>
+            <p className="eyebrow" style={{ marginBottom: '6px' }}>Header</p>
+            <pre style={{ margin: 0, color: 'var(--text)', fontSize: '0.875rem', whiteSpace: 'pre-wrap', wordBreak: 'break-all' }}>
+              {JSON.stringify(decoded.header, null, 2)}
+            </pre>
+          </div>
+          <div style={sectionBox}>
+            <p className="eyebrow" style={{ marginBottom: '6px' }}>Payload</p>
+            <pre style={{ margin: 0, color: 'var(--text)', fontSize: '0.875rem', whiteSpace: 'pre-wrap', wordBreak: 'break-all' }}>
+              {JSON.stringify(decoded.payload, null, 2)}
+            </pre>
+          </div>
+          <div style={{ ...sectionBox, borderColor: decoded.expired ? '#ef4444' : '#22c55e' }}>
+            <p className="eyebrow" style={{ marginBottom: '4px' }}>Status</p>
+            <span style={{ fontWeight: 700, color: decoded.expired ? '#ef4444' : '#22c55e' }}>
+              {decoded.expired ? 'Abgelaufen' : 'Gültig'}
+            </span>
+          </div>
+        </>
+      )}
+    </div>
+  );
+}
+
+export default JwtDecoderTool;

frontend/src/components/PasswordGenTool.jsx

@@ -0,0 +1,108 @@
+import { useState } from 'react';
+import axios from '../services/api';
+
+const resultBox = {
+  marginTop: '12px',
+  padding: '12px 14px',
+  background: 'var(--surface-2)',
+  border: '1px solid var(--border)',
+  borderRadius: '12px',
+  display: 'flex',
+  alignItems: 'center',
+  gap: '10px',
+  justifyContent: 'space-between',
+};
+
+function getStrength(length, charsets) {
+  const score = (charsets >= 3 ? 2 : charsets >= 2 ? 1 : 0) + (length >= 16 ? 2 : length >= 12 ? 1 : 0);
+  if (score >= 4) return { label: 'Stark', color: '#22c55e' };
+  if (score >= 2) return { label: 'Mittel', color: '#f59e0b' };
+  return { label: 'Schwach', color: '#ef4444' };
+}
+
+function PasswordGenTool() {
+  const [length, setLength] = useState(16);
+  const [uppercase, setUppercase] = useState(true);
+  const [lowercase, setLowercase] = useState(true);
+  const [numbers, setNumbers] = useState(true);
+  const [symbols, setSymbols] = useState(false);
+  const [result, setResult] = useState('');
+  const [copied, setCopied] = useState(false);
+  const [error, setError] = useState('');
+
+  const charsets = [uppercase, lowercase, numbers, symbols].filter(Boolean).length;
+  const strength = getStrength(length, charsets);
+
+  const generate = async () => {
+    setError('');
+    try {
+      const res = await axios.post('/api/password/generate', { length, uppercase, lowercase, numbers, symbols });
+      setResult(res.data.password);
+    } catch (err) {
+      setError(err.response?.data?.message || 'Fehler beim Generieren');
+    }
+  };
+
+  const copy = () => {
+    navigator.clipboard.writeText(result);
+    setCopied(true);
+    setTimeout(() => setCopied(false), 1500);
+  };
+
+  return (
+    <div className="main-content">
+      <h2>Passwort-Generator</h2>
+
+      <label style={{ display: 'block', color: 'var(--muted)', fontWeight: 600, marginBottom: '6px' }}>
+        Länge: {length}
+      </label>
+      <input
+        type="range"
+        min={8}
+        max={64}
+        value={length}
+        onChange={(e) => setLength(Number(e.target.value))}
+        style={{ accentColor: 'var(--accent)', padding: 0, border: 'none', background: 'transparent', marginBottom: '12px' }}
+      />
+
+      <div style={{ display: 'flex', flexWrap: 'wrap', gap: '16px', margin: '8px 0 12px' }}>
+        {[
+          { label: 'Großbuchstaben', value: uppercase, set: setUppercase },
+          { label: 'Kleinbuchstaben', value: lowercase, set: setLowercase },
+          { label: 'Zahlen', value: numbers, set: setNumbers },
+          { label: 'Sonderzeichen', value: symbols, set: setSymbols },
+        ].map(({ label, value, set }) => (
+          <label key={label} style={{ display: 'flex', alignItems: 'center', gap: '6px', cursor: 'pointer', color: 'var(--text)', fontWeight: 500 }}>
+            <input
+              type="checkbox"
+              checked={value}
+              onChange={(e) => set(e.target.checked)}
+              style={{ width: 'auto', accentColor: 'var(--accent)' }}
+            />
+            {label}
+          </label>
+        ))}
+      </div>
+
+      <div style={{ display: 'flex', alignItems: 'center', gap: '12px', marginBottom: '4px' }}>
+        <span className="muted" style={{ fontSize: '0.875rem' }}>Stärke:</span>
+        <span style={{ fontWeight: 700, color: strength.color }}>{strength.label}</span>
+      </div>
+
+      <button onClick={generate}>Generieren</button>
+      {error && <p className="error">{error}</p>}
+      {result && (
+        <div style={resultBox}>
+          <span style={{ wordBreak: 'break-all', color: 'var(--text)', fontFamily: 'monospace', fontSize: '0.95rem' }}>
+            {result}
+          </span>
+          <button className="ghost" onClick={copy} style={{ flexShrink: 0, margin: 0 }}>
+            {copied ? 'Kopiert!' : 'Kopieren'}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default PasswordGenTool;

frontend/src/components/TextDiffTool.jsx

@@ -0,0 +1,84 @@
+import { useState } from 'react';
+import axios from '../services/api';
+
+const diffColors = {
+  added:     { bg: 'rgba(34, 197, 94, 0.12)',  text: '#22c55e', prefix: '+ ' },
+  removed:   { bg: 'rgba(239, 68, 68, 0.12)',  text: '#ef4444', prefix: '- ' },
+  unchanged: { bg: 'transparent',               text: 'var(--muted)', prefix: '  ' },
+};
+
+function TextDiffTool() {
+  const [text1, setText1] = useState('');
+  const [text2, setText2] = useState('');
+  const [diff, setDiff] = useState(null);
+
+  const compare = async () => {
+    try {
+      const res = await axios.post('/api/text/diff', { text1, text2 });
+      setDiff(res.data.diff);
+    } catch {
+      alert('Fehler beim Vergleich');
+    }
+  };
+
+  return (
+    <div className="main-content">
+      <h2>Text Diff</h2>
+      <div style={{ display: 'grid', gridTemplateColumns: '1fr 1fr', gap: '12px' }}>
+        <div>
+          <p className="muted" style={{ marginBottom: '6px', fontWeight: 600 }}>Text A</p>
+          <textarea
+            rows={10}
+            value={text1}
+            onChange={(e) => { setText1(e.target.value); setDiff(null); }}
+            placeholder="Originaltext eingeben..."
+            style={{ resize: 'vertical', fontFamily: 'monospace', fontSize: '0.875rem' }}
+          />
+        </div>
+        <div>
+          <p className="muted" style={{ marginBottom: '6px', fontWeight: 600 }}>Text B</p>
+          <textarea
+            rows={10}
+            value={text2}
+            onChange={(e) => { setText2(e.target.value); setDiff(null); }}
+            placeholder="Geänderter Text eingeben..."
+            style={{ resize: 'vertical', fontFamily: 'monospace', fontSize: '0.875rem' }}
+          />
+        </div>
+      </div>
+
+      <button onClick={compare}>Vergleichen</button>
+
+      {diff !== null && (
+        <div style={{ marginTop: '16px', border: '1px solid var(--border)', borderRadius: '12px', overflow: 'hidden' }}>
+          {diff.length === 0 ? (
+            <p style={{ padding: '12px 14px', color: 'var(--muted)', margin: 0 }}>Keine Unterschiede gefunden.</p>
+          ) : (
+            diff.map((line, i) => {
+              const c = diffColors[line.type] || diffColors.unchanged;
+              return (
+                <div
+                  key={i}
+                  style={{
+                    padding: '2px 14px',
+                    background: c.bg,
+                    color: c.text,
+                    fontFamily: 'monospace',
+                    fontSize: '0.875rem',
+                    whiteSpace: 'pre-wrap',
+                    wordBreak: 'break-all',
+                    borderLeft: `3px solid ${line.type !== 'unchanged' ? c.text : 'transparent'}`,
+                  }}
+                >
+                  {c.prefix}{line.text}
+                </div>
+              );
+            })
+          )}
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default TextDiffTool;

frontend/src/components/TimestampTool.jsx

@@ -0,0 +1,101 @@
+import { useState, useEffect } from 'react';
+import axios from '../services/api';
+
+const resultBox = {
+  marginTop: '12px',
+  padding: '12px 14px',
+  background: 'var(--surface-2)',
+  border: '1px solid var(--border)',
+  borderRadius: '12px',
+  display: 'flex',
+  alignItems: 'center',
+  gap: '10px',
+  justifyContent: 'space-between',
+};
+
+function TimestampTool() {
+  const [value, setValue] = useState('');
+  const [direction, setDirection] = useState('unix_to_date');
+  const [result, setResult] = useState(null);
+  const [copied, setCopied] = useState(false);
+  const [error, setError] = useState('');
+  const [now, setNow] = useState(Math.floor(Date.now() / 1000));
+
+  useEffect(() => {
+    const interval = setInterval(() => setNow(Math.floor(Date.now() / 1000)), 1000);
+    return () => clearInterval(interval);
+  }, []);
+
+  const convert = async () => {
+    setError('');
+    setResult(null);
+    try {
+      const res = await axios.post('/api/timestamp/convert', { value, direction });
+      setResult(res.data);
+    } catch (err) {
+      setError(err.response?.data?.message || 'Ungültiger Wert');
+    }
+  };
+
+  const resultText = result
+    ? direction === 'unix_to_date' ? result.utc : String(result.unix)
+    : '';
+
+  const copy = () => {
+    navigator.clipboard.writeText(resultText);
+    setCopied(true);
+    setTimeout(() => setCopied(false), 1500);
+  };
+
+  return (
+    <div className="main-content">
+      <h2>Timestamp Converter</h2>
+
+      <div style={{ marginBottom: '12px', padding: '10px 14px', background: 'var(--surface-2)', border: '1px solid var(--border)', borderRadius: '12px' }}>
+        <span className="muted" style={{ fontSize: '0.875rem' }}>Aktueller Unix Timestamp: </span>
+        <span style={{ fontFamily: 'monospace', color: 'var(--accent)', fontWeight: 700 }}>{now}</span>
+      </div>
+
+      <div style={{ display: 'flex', gap: '8px', marginBottom: '12px' }}>
+        {[
+          { key: 'unix_to_date', label: 'Unix → Datum' },
+          { key: 'date_to_unix', label: 'Datum → Unix' },
+        ].map(({ key, label }) => (
+          <button
+            key={key}
+            className={direction === key ? '' : 'ghost'}
+            onClick={() => { setDirection(key); setResult(null); setError(''); }}
+            style={{ margin: 0 }}
+          >
+            {label}
+          </button>
+        ))}
+      </div>
+
+      <input
+        type="text"
+        value={value}
+        onChange={(e) => { setValue(e.target.value); setResult(null); setError(''); }}
+        placeholder={direction === 'unix_to_date' ? 'z.B. 1700000000' : 'z.B. 2024-01-15 oder 15.01.2024'}
+      />
+      <button onClick={convert}>Konvertieren</button>
+      {error && <p className="error">{error}</p>}
+      {result && (
+        <div style={resultBox}>
+          <div>
+            {direction === 'unix_to_date' ? (
+              <span style={{ fontFamily: 'monospace', color: 'var(--text)' }}>{result.utc}</span>
+            ) : (
+              <span style={{ fontFamily: 'monospace', color: 'var(--text)' }}>{result.unix}</span>
+            )}
+          </div>
+          <button className="ghost" onClick={copy} style={{ flexShrink: 0, margin: 0 }}>
+            {copied ? 'Kopiert!' : 'Kopieren'}
+          </button>
+        </div>
+      )}
+    </div>
+  );
+}
+
+export default TimestampTool;

frontend/src/components/ToolOverview.jsx

@@ -2,9 +2,18 @@ import { useNavigate } from 'react-router-dom';
 import { useEffect, useState } from 'react';
 import axios from '../services/api';
 
+const TOOLS = [
+  { icon: '🔒', path: '/tools/md5',       title: 'MD5 Hasher',           desc: 'MD5-Hash berechnen (nur zur Analyse)' },
+  { icon: '#️⃣', path: '/tools/hasher',    title: 'SHA256 / bcrypt',      desc: 'Sichere Hash-Algorithmen für Strings' },
+  { icon: '📦', path: '/tools/base64',    title: 'Base64',               desc: 'Text kodieren und dekodieren' },
+  { icon: '🔑', path: '/tools/jwt',       title: 'JWT Decoder',          desc: 'JWT Token analysieren (ohne Signaturprüfung)' },
+  { icon: '🔐', path: '/tools/password',  title: 'Passwort-Generator',   desc: 'Sichere Passwörter generieren' },
+  { icon: '🕐', path: '/tools/timestamp', title: 'Timestamp Converter',  desc: 'Unix Timestamp in Datum umrechnen' },
+  { icon: '📝', path: '/tools/textdiff',  title: 'Text Diff',            desc: 'Zwei Texte vergleichen' },
+];
+
 function ToolOverview() {
   const navigate = useNavigate();
-  const role = localStorage.getItem('role');
   const [websites, setWebsites] = useState([]);
   const [loadingWebsites, setLoadingWebsites] = useState(true);
 
@@ -13,7 +22,7 @@ function ToolOverview() {
       try {
         const res = await axios.get('/api/websites');
         setWebsites(res.data);
-      } catch (e) {
+      } catch {
         setWebsites([]);
       } finally {
         setLoadingWebsites(false);
@@ -27,9 +36,24 @@ function ToolOverview() {
       <h2>Tool-Übersicht</h2>
       <p>Wähle ein Tool aus:</p>
 
-      <button onClick={() => navigate('/tools/md5')}>🔒 MD5 Tool</button><br /><br />
+      <div className="card-grid">
+        {TOOLS.map((tool) => (
+          <div
+            key={tool.path}
+            className="link-card"
+            onClick={() => navigate(tool.path)}
+            style={{ cursor: 'pointer' }}
+          >
+            <div className="link-card__icon">{tool.icon}</div>
+            <div>
+              <div className="link-card__title">{tool.title}</div>
+              <div className="link-card__desc">{tool.desc}</div>
+            </div>
+          </div>
+        ))}
+      </div>
 
-      <h3 style={{ marginTop: '24px' }}>🌐 Externe Webseiten</h3>
+      <h3 style={{ marginTop: '24px' }}>Externe Webseiten</h3>
       {loadingWebsites ? (
         <p className="muted">Lade Links...</p>
       ) : websites.length === 0 ? (