diff --git a/README.md b/README.md
index f6948ad..5a83916 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ This project is a full-stack web application featuring:
 - 🛠️ **Admin Panel** - Manage tables, columns, and data through a beautiful UI
 - 📊 **Table Manager** - Create and drop tables with visual column definition
 - 🔧 **Column Manager** - Add, modify, and drop columns from existing tables
-- 🔒 **Constraint Manager** - Add and manage UNIQUE and CHECK constraints (API ready, UI in progress)
+- 🔒 **Constraint Manager** - Add and manage UNIQUE and CHECK constraints (fully implemented)
 - 📊 **SQL Query Interface** - Execute custom queries with safety validation
 - 🔒 **JWT Authentication** with secure session management
 - 📦 **DrizzleORM** - Support for PostgreSQL, MySQL, and SQLite
@@ -767,10 +767,9 @@ See [ROADMAP.md](ROADMAP.md) for planned features and improvements.
 - ✅ Table Manager - Create and drop tables with visual column builder
 - ✅ Column Manager - Add, modify, and drop columns from existing tables
 - ✅ Schema management interface for table and column operations
-- 🔄 Constraint Manager - Add and manage UNIQUE and CHECK constraints (API complete, UI in progress)
+- ✅ Constraint Manager - Add and manage UNIQUE and CHECK constraints (fully implemented)
 
 **Upcoming features:**
-- Complete constraint management UI
 - Visual database designer
 - Multi-database server connections
 - Advanced query builder
diff --git a/ROADMAP.md b/ROADMAP.md
index 0446461..860fa63 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -60,11 +60,11 @@ See `src/config/features.json` for the complete feature configuration.
   - [x] ✅ Create schema management interface
   - [x] ✅ Implement table creation/editing UI (API ready, UI implemented)
   - [x] ✅ Add column type management UI (API ready, UI implemented)
-  - [ ] Add data validation and constraints management 🏗️ **IN PROGRESS**
+  - [x] Add data validation and constraints management ✅ **COMPLETED**
     - [x] ✅ Implement constraints API (UNIQUE, CHECK constraints)
     - [x] ✅ Add constraint listing endpoint
     - [x] ✅ Add constraint creation/deletion endpoints
-    - [ ] Build constraints management UI
+    - [x] ✅ Build constraints management UI
     - [ ] Add PRIMARY KEY constraint support
     - [ ] Add DEFAULT value management
     - [ ] Add NOT NULL constraint management
diff --git a/TESTING.md b/TESTING.md
index 33b873f..03b4537 100644
--- a/TESTING.md
+++ b/TESTING.md
@@ -149,9 +149,9 @@ All tests verify that:
 | Feature Config | - | - | - | 40 | 40 |
 | Table Manager | 7 | 2 (2 skipped) | 3 | - | 12 |
 | Column Manager | 9 | 2 (2 skipped) | 3 | - | 14 |
-| Constraint Manager | 14 | 0 (UI pending) | 3 | 4 | 21 |
+| Constraint Manager | 14 | 3 (3 skipped) | 4 | 4 | 25 |
 | Admin Dashboard | - | 3 | 3 | - | 6 |
-| **Total** | **30** | **7** | **12** | **44** | **93** |
+| **Total** | **30** | **10** | **16** | **44** | **100** |
 
 ## Feature: Constraint Management Tests
 
@@ -186,6 +186,25 @@ Tests for the Constraint Management API endpoints (`/api/admin/constraints`):
 - Error handling for all CRUD operations
 - Support for UNIQUE and CHECK constraints
 
+### End-to-End Tests (Playwright UI Tests)
+
+#### 2. `tests/e2e/AdminDashboard.e2e.ts` - Constraints Manager UI
+
+**UI Tests:**
+- 🔄 Display Constraints tab (requires auth - skipped)
+- 🔄 Show table selector in Constraints Manager (requires auth - skipped)
+- 🔄 Open add constraint dialog (requires auth - skipped)
+
+**Security Tests:**
+- ✅ Blocks constraint API access without authentication
+
+**Note:** UI tests are skipped because they require an authenticated session. These can be enabled when a test authentication mechanism is implemented.
+
+**Components Implemented:**
+- ✅ `ConstraintManagerTab.tsx` - Main UI component for managing constraints
+- ✅ `ConstraintDialog.tsx` - Reusable dialog for add/delete constraint operations
+- ✅ Integration with admin dashboard navigation and handlers
+
 ### Unit Tests
 
 #### 2. `src/utils/featureConfig.test.ts`
@@ -269,4 +288,4 @@ When adding new features:
 
 **Last Updated:** January 2026
 **Test Framework:** Playwright + Vitest
-**Coverage Status:** ✅ API Validation | 🔄 UI Tests (partial - needs auth)
+**Coverage Status:** ✅ API Validation | 🔄 UI Tests (partial - needs auth) | ✅ Constraint Manager UI Complete
diff --git a/src/app/admin/dashboard/page.tsx b/src/app/admin/dashboard/page.tsx
index 3661bb4..721e715 100644
--- a/src/app/admin/dashboard/page.tsx
+++ b/src/app/admin/dashboard/page.tsx
@@ -5,6 +5,7 @@ import CodeIcon from '@mui/icons-material/Code';
 import DeleteIcon from '@mui/icons-material/Delete';
 import EditIcon from '@mui/icons-material/Edit';
 import LogoutIcon from '@mui/icons-material/Logout';
+import RuleIcon from '@mui/icons-material/Rule';
 import StorageIcon from '@mui/icons-material/Storage';
 import TableChartIcon from '@mui/icons-material/TableChart';
 import ViewColumnIcon from '@mui/icons-material/ViewColumn';
@@ -43,6 +44,7 @@ import {
 import { ThemeProvider } from '@mui/material/styles';
 import { useRouter } from 'next/navigation';
 import { useCallback, useEffect, useState } from 'react';
+import ConstraintManagerTab from '@/components/admin/ConstraintManagerTab';
 import { theme } from '@/utils/theme';
 
 const DRAWER_WIDTH = 240;
@@ -491,6 +493,71 @@ export default function AdminDashboard() {
     }
   };
 
+  // Constraint Management Handlers
+  const handleAddConstraint = async (tableName: string, data: any) => {
+    setLoading(true);
+    setError('');
+    setSuccessMessage('');
+
+    try {
+      const response = await fetch('/api/admin/constraints', {
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          tableName,
+          ...data,
+        }),
+      });
+
+      const result = await response.json();
+
+      if (!response.ok) {
+        throw new Error(result.error || 'Failed to add constraint');
+      }
+
+      setSuccessMessage(result.message || 'Constraint added successfully');
+    } catch (err: any) {
+      setError(err.message);
+      throw err;
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const handleDropConstraint = async (tableName: string, constraintName: string) => {
+    setLoading(true);
+    setError('');
+    setSuccessMessage('');
+
+    try {
+      const response = await fetch('/api/admin/constraints', {
+        method: 'DELETE',
+        headers: {
+          'Content-Type': 'application/json',
+        },
+        body: JSON.stringify({
+          tableName,
+          constraintName,
+        }),
+      });
+
+      const result = await response.json();
+
+      if (!response.ok) {
+        throw new Error(result.error || 'Failed to drop constraint');
+      }
+
+      setSuccessMessage(result.message || 'Constraint dropped successfully');
+    } catch (err: any) {
+      setError(err.message);
+      throw err;
+    } finally {
+      setLoading(false);
+    }
+  };
+
   return (
     <ThemeProvider theme={theme}>
       <Box sx={{ display: 'flex' }}>
@@ -555,6 +622,14 @@ export default function AdminDashboard() {
                   <ListItemText primary="Column Manager" />
                 </ListItemButton>
               </ListItem>
+              <ListItem disablePadding>
+                <ListItemButton onClick={() => setTabValue(4)}>
+                  <ListItemIcon>
+                    <RuleIcon />
+                  </ListItemIcon>
+                  <ListItemText primary="Constraints" />
+                </ListItemButton>
+              </ListItem>
             </List>
           </Box>
         </Drawer>
@@ -763,6 +838,14 @@ export default function AdminDashboard() {
             )}
           </TabPanel>
 
+          <TabPanel value={tabValue} index={4}>
+            <ConstraintManagerTab
+              tables={tables}
+              onAddConstraint={handleAddConstraint}
+              onDropConstraint={handleDropConstraint}
+            />
+          </TabPanel>
+
           {successMessage && (
             <Alert severity="success" sx={{ mt: 2 }} onClose={() => setSuccessMessage('')}>
               {successMessage}
diff --git a/src/components/admin/ConstraintDialog.tsx b/src/components/admin/ConstraintDialog.tsx
new file mode 100644
index 0000000..b7c9c27
--- /dev/null
+++ b/src/components/admin/ConstraintDialog.tsx
@@ -0,0 +1,188 @@
+'use client';
+
+import {
+  Button,
+  Dialog,
+  DialogActions,
+  DialogContent,
+  DialogTitle,
+  MenuItem,
+  Select,
+  TextField,
+  Typography,
+} from '@mui/material';
+import { useEffect, useState } from 'react';
+
+type ConstraintDialogProps = {
+  open: boolean;
+  mode: 'add' | 'delete';
+  constraintTypes: Array<{
+    name: string;
+    description: string;
+    requiresColumn: boolean;
+    requiresExpression: boolean;
+  }>;
+  selectedConstraint?: any;
+  onClose: () => void;
+  onSubmit: (data: any) => Promise<void>;
+};
+
+export default function ConstraintDialog({
+  open,
+  mode,
+  constraintTypes,
+  selectedConstraint,
+  onClose,
+  onSubmit,
+}: ConstraintDialogProps) {
+  const [constraintName, setConstraintName] = useState('');
+  const [constraintType, setConstraintType] = useState('UNIQUE');
+  const [columnName, setColumnName] = useState('');
+  const [checkExpression, setCheckExpression] = useState('');
+  const [loading, setLoading] = useState(false);
+
+  useEffect(() => {
+    if (!open) {
+      // Reset form when dialog closes
+      setConstraintName('');
+      setConstraintType('UNIQUE');
+      setColumnName('');
+      setCheckExpression('');
+    }
+  }, [open]);
+
+  const handleSubmit = async () => {
+    setLoading(true);
+    try {
+      if (mode === 'add') {
+        const data: any = {
+          constraintName,
+          constraintType,
+        };
+
+        // Get the current constraint type config
+        const currentType = constraintTypes.find(ct => ct.name === constraintType);
+
+        if (currentType?.requiresColumn) {
+          data.columnName = columnName;
+        }
+
+        if (currentType?.requiresExpression) {
+          data.checkExpression = checkExpression;
+        }
+
+        await onSubmit(data);
+      } else if (mode === 'delete') {
+        // For delete, we just need to confirm
+        await onSubmit({});
+      }
+      onClose();
+    } finally {
+      setLoading(false);
+    }
+  };
+
+  const getTitle = () => {
+    if (mode === 'add') {
+      return 'Add Constraint';
+    }
+    return `Delete Constraint: ${selectedConstraint?.constraint_name}`;
+  };
+
+  const isFormValid = () => {
+    if (mode === 'delete') {
+      return true; // Always valid for delete
+    }
+
+    if (!constraintName.trim() || !constraintType) {
+      return false;
+    }
+
+    const currentType = constraintTypes.find(ct => ct.name === constraintType);
+
+    if (currentType?.requiresColumn && !columnName.trim()) {
+      return false;
+    }
+
+    if (currentType?.requiresExpression && !checkExpression.trim()) {
+      return false;
+    }
+
+    return true;
+  };
+
+  const currentType = constraintTypes.find(ct => ct.name === constraintType);
+
+  return (
+    <Dialog open={open} onClose={onClose} maxWidth="sm" fullWidth>
+      <DialogTitle>{getTitle()}</DialogTitle>
+      <DialogContent>
+        {mode === 'delete' ? (
+          <Typography variant="body2" color="error" gutterBottom>
+            Are you sure you want to delete the constraint "
+            {selectedConstraint?.constraint_name}"? This action cannot be undone.
+          </Typography>
+        ) : (
+          <>
+            <TextField
+              fullWidth
+              label="Constraint Name"
+              value={constraintName}
+              onChange={e => setConstraintName(e.target.value)}
+              sx={{ mt: 2, mb: 2 }}
+              helperText="A unique name for this constraint"
+            />
+
+            <Select
+              fullWidth
+              value={constraintType}
+              onChange={e => setConstraintType(e.target.value)}
+              sx={{ mb: 2 }}
+            >
+              {constraintTypes.map((type) => (
+                <MenuItem key={type.name} value={type.name}>
+                  {type.name} - {type.description}
+                </MenuItem>
+              ))}
+            </Select>
+
+            {currentType?.requiresColumn && (
+              <TextField
+                fullWidth
+                label="Column Name"
+                value={columnName}
+                onChange={e => setColumnName(e.target.value)}
+                sx={{ mb: 2 }}
+                helperText="The column to apply this constraint to"
+              />
+            )}
+
+            {currentType?.requiresExpression && (
+              <TextField
+                fullWidth
+                label="Check Expression"
+                value={checkExpression}
+                onChange={e => setCheckExpression(e.target.value)}
+                sx={{ mb: 2 }}
+                multiline
+                rows={3}
+                helperText="Boolean expression for the check constraint (e.g., price > 0)"
+              />
+            )}
+          </>
+        )}
+      </DialogContent>
+      <DialogActions>
+        <Button onClick={onClose}>Cancel</Button>
+        <Button
+          onClick={handleSubmit}
+          variant="contained"
+          color={mode === 'delete' ? 'error' : 'primary'}
+          disabled={loading || !isFormValid()}
+        >
+          {mode === 'add' ? 'Add Constraint' : 'Delete Constraint'}
+        </Button>
+      </DialogActions>
+    </Dialog>
+  );
+}
diff --git a/src/components/admin/ConstraintManagerTab.tsx b/src/components/admin/ConstraintManagerTab.tsx
new file mode 100644
index 0000000..2006cfe
--- /dev/null
+++ b/src/components/admin/ConstraintManagerTab.tsx
@@ -0,0 +1,203 @@
+'use client';
+
+import AddIcon from '@mui/icons-material/Add';
+import DeleteIcon from '@mui/icons-material/Delete';
+import {
+  Box,
+  Button,
+  MenuItem,
+  Paper,
+  Select,
+  Table,
+  TableBody,
+  TableCell,
+  TableContainer,
+  TableHead,
+  TableRow,
+  Typography,
+} from '@mui/material';
+import { useCallback, useEffect, useState } from 'react';
+import { getConstraintTypes, getFeatureById } from '@/utils/featureConfig';
+import ConstraintDialog from './ConstraintDialog';
+
+type ConstraintManagerTabProps = {
+  tables: Array<{ table_name: string }>;
+  onAddConstraint: (tableName: string, data: any) => Promise<void>;
+  onDropConstraint: (tableName: string, constraintName: string) => Promise<void>;
+};
+
+export default function ConstraintManagerTab({
+  tables,
+  onAddConstraint,
+  onDropConstraint,
+}: ConstraintManagerTabProps) {
+  const [selectedTable, setSelectedTable] = useState('');
+  const [constraints, setConstraints] = useState<any[]>([]);
+  const [dialogState, setDialogState] = useState<{
+    open: boolean;
+    mode: 'add' | 'delete';
+  }>({ open: false, mode: 'add' });
+  const [selectedConstraint, setSelectedConstraint] = useState<any>(null);
+
+  // Get feature configuration from JSON
+  const feature = getFeatureById('constraint-management');
+  const constraintTypes = getConstraintTypes();
+
+  // Check if actions are enabled from config
+  const canAdd = feature?.ui.actions.includes('add');
+  const canDelete = feature?.ui.actions.includes('delete');
+
+  // Fetch constraints when table is selected
+  const fetchConstraints = useCallback(async () => {
+    try {
+      const response = await fetch(
+        `/api/admin/constraints?tableName=${selectedTable}`,
+        {
+          method: 'GET',
+        },
+      );
+
+      if (response.ok) {
+        const data = await response.json();
+        setConstraints(data.constraints || []);
+      }
+    } catch (error) {
+      console.error('Failed to fetch constraints:', error);
+    }
+  }, [selectedTable]);
+
+  useEffect(() => {
+    if (selectedTable) {
+      fetchConstraints();
+    } else {
+      setConstraints([]);
+    }
+  }, [selectedTable, fetchConstraints]);
+
+  const handleConstraintOperation = async (data: any) => {
+    if (dialogState.mode === 'add') {
+      await onAddConstraint(selectedTable, data);
+    } else if (dialogState.mode === 'delete' && selectedConstraint) {
+      await onDropConstraint(selectedTable, selectedConstraint.constraint_name);
+    }
+    await fetchConstraints(); // Refresh constraints list
+  };
+
+  const openAddDialog = () => {
+    setSelectedConstraint(null);
+    setDialogState({ open: true, mode: 'add' });
+  };
+
+  const openDeleteDialog = (constraint: any) => {
+    setSelectedConstraint(constraint);
+    setDialogState({ open: true, mode: 'delete' });
+  };
+
+  const closeDialog = () => {
+    setDialogState({ ...dialogState, open: false });
+    setSelectedConstraint(null);
+  };
+
+  return (
+    <>
+      <Typography variant="h5" gutterBottom>
+        {feature?.name || 'Constraint Manager'}
+      </Typography>
+
+      {feature?.description && (
+        <Typography variant="body2" color="text.secondary" gutterBottom>
+          {feature.description}
+        </Typography>
+      )}
+
+      <Box sx={{ mt: 2, mb: 2 }}>
+        <Select
+          value={selectedTable}
+          onChange={e => setSelectedTable(e.target.value)}
+          displayEmpty
+          fullWidth
+          sx={{ maxWidth: 400 }}
+        >
+          <MenuItem value="">
+            <em>Select a table</em>
+          </MenuItem>
+          {tables.map(table => (
+            <MenuItem key={table.table_name} value={table.table_name}>
+              {table.table_name}
+            </MenuItem>
+          ))}
+        </Select>
+      </Box>
+
+      {selectedTable && (
+        <>
+          <Box sx={{ mt: 2, mb: 2 }}>
+            {canAdd && (
+              <Button
+                variant="contained"
+                startIcon={<AddIcon />}
+                onClick={openAddDialog}
+              >
+                Add Constraint
+              </Button>
+            )}
+          </Box>
+
+          <Paper sx={{ mt: 2 }}>
+            <TableContainer>
+              <Table>
+                <TableHead>
+                  <TableRow>
+                    <TableCell>Constraint Name</TableCell>
+                    <TableCell>Type</TableCell>
+                    <TableCell>Column</TableCell>
+                    <TableCell>Expression</TableCell>
+                    <TableCell align="right">Actions</TableCell>
+                  </TableRow>
+                </TableHead>
+                <TableBody>
+                  {constraints.map((constraint) => (
+                    <TableRow key={constraint.constraint_name}>
+                      <TableCell>{constraint.constraint_name}</TableCell>
+                      <TableCell>{constraint.constraint_type}</TableCell>
+                      <TableCell>{constraint.column_name || '-'}</TableCell>
+                      <TableCell>{constraint.check_clause || '-'}</TableCell>
+                      <TableCell align="right">
+                        {canDelete && (
+                          <Button
+                            size="small"
+                            color="error"
+                            startIcon={<DeleteIcon />}
+                            onClick={() => openDeleteDialog(constraint)}
+                          >
+                            Delete
+                          </Button>
+                        )}
+                      </TableCell>
+                    </TableRow>
+                  ))}
+                  {constraints.length === 0 && (
+                    <TableRow>
+                      <TableCell colSpan={5} align="center">
+                        No constraints found for this table
+                      </TableCell>
+                    </TableRow>
+                  )}
+                </TableBody>
+              </Table>
+            </TableContainer>
+          </Paper>
+        </>
+      )}
+
+      <ConstraintDialog
+        open={dialogState.open}
+        mode={dialogState.mode}
+        constraintTypes={constraintTypes}
+        selectedConstraint={selectedConstraint}
+        onSubmit={handleConstraintOperation}
+        onClose={closeDialog}
+      />
+    </>
+  );
+}
diff --git a/tests/e2e/AdminDashboard.e2e.ts b/tests/e2e/AdminDashboard.e2e.ts
index 0be4570..65a1b33 100644
--- a/tests/e2e/AdminDashboard.e2e.ts
+++ b/tests/e2e/AdminDashboard.e2e.ts
@@ -95,5 +95,44 @@ test.describe('Admin Dashboard', () => {
       
       expect(response.status()).toBe(401);
     });
+
+    test('should not allow constraint management without auth', async ({ page }) => {
+      const response = await page.request.get('/api/admin/constraints?tableName=test');
+      
+      expect(response.status()).toBe(401);
+    });
+  });
+
+  test.describe('Constraints Manager UI', () => {
+    test.skip('should display Constraints tab after login', async ({ page }) => {
+      // This test would require actual authentication
+      // Skipping for now as it needs a real admin user
+      
+      // await page.goto('/admin/dashboard');
+      // await expect(page.getByText('Constraints')).toBeVisible();
+    });
+
+    test.skip('should show table selector in Constraints Manager', async ({ page }) => {
+      // This test would require authentication
+      // Skipping for now
+      
+      // await page.goto('/admin/dashboard');
+      // await page.getByText('Constraints').click();
+      
+      // await expect(page.getByText(/select a table/i)).toBeVisible();
+    });
+
+    test.skip('should open add constraint dialog', async ({ page }) => {
+      // This test would require authentication
+      // Skipping for now
+      
+      // await page.goto('/admin/dashboard');
+      // await page.getByText('Constraints').click();
+      // Select a table first
+      // await page.getByRole('button', { name: /add constraint/i }).click();
+      
+      // await expect(page.getByText('Add Constraint')).toBeVisible();
+      // await expect(page.getByLabel(/constraint name/i)).toBeVisible();
+    });
   });
 });