diff --git a/package-lock.json b/package-lock.json
index d92caa0..ce80842 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -17,7 +17,8 @@
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@@ -795,6 +796,15 @@
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@@ -893,6 +933,36 @@
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+      "funding": {
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+        "url": "https://github.com/sponsors/wooorm"
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@@ -913,6 +983,15 @@
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@@ -941,6 +1020,41 @@
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@@ -1110,6 +1224,18 @@
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@@ -1289,6 +1415,89 @@
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+      "funding": {
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+    "node_modules/micromark-factory-label": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-factory-label/-/micromark-factory-label-2.0.1.tgz",
+      "integrity": "sha512-VFMekyQExqIW7xIChcXn4ok29YE3rnuyveW3wZQWWqF4Nv9Wk5rgJ99KzPvHjkmPXF93FXIbBp6YdW3t71/7Vg==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "devlop": "^1.0.0",
+        "micromark-util-character": "^2.0.0",
+        "micromark-util-symbol": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-factory-space": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-factory-space/-/micromark-factory-space-2.0.1.tgz",
+      "integrity": "sha512-zRkxjtBxxLd2Sc0d+fbnEunsTj46SWXgXciZmHq0kDYGnck/ZSGj9/wULTV95uoeYiK5hRXP2mJ98Uo4cq/LQg==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-character": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-factory-title": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-factory-title/-/micromark-factory-title-2.0.1.tgz",
+      "integrity": "sha512-5bZ+3CjhAd9eChYTHsjy6TGxpOFSKgKKJPJxr293jTbfry2KDoWkhBb6TcPVB4NmzaPhMs1Frm9AZH7OD4Cjzw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-factory-space": "^2.0.0",
+        "micromark-util-character": "^2.0.0",
+        "micromark-util-symbol": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-factory-whitespace": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-factory-whitespace/-/micromark-factory-whitespace-2.0.1.tgz",
+      "integrity": "sha512-Ob0nuZ3PKt/n0hORHyvoD9uZhr+Za8sFoP+OnMcnWK5lngSzALgQYKMr9RJVOWLqQYuyn6ulqGWSXdwf6F80lQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-factory-space": "^2.0.0",
+        "micromark-util-character": "^2.0.0",
+        "micromark-util-symbol": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-character": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-character/-/micromark-util-character-2.1.1.tgz",
+      "integrity": "sha512-wv8tdUTJ3thSFFFJKtpYKOYiGP2+v96Hvk4Tu8KpCAsTMs6yi+nVmGh1syvSCsaxz45J6Jbw+9DD6g97+NV67Q==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-symbol": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-chunked": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-chunked/-/micromark-util-chunked-2.0.1.tgz",
+      "integrity": "sha512-QUNFEOPELfmvv+4xiNg2sRYeS/P84pTW0TCgP5zc9FpXetHY0ab7SxKyAQCNCc1eK0459uoLI1y5oO5Vc1dbhA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-symbol": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-classify-character": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-classify-character/-/micromark-util-classify-character-2.0.1.tgz",
+      "integrity": "sha512-K0kHzM6afW/MbeWYWLjoHQv1sgg2Q9EccHEDzSkxiP/EaagNzCm7T/WMKZ3rjMbvIpvBiZgwR3dKMygtA4mG1Q==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-character": "^2.0.0",
+        "micromark-util-symbol": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-combine-extensions": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-combine-extensions/-/micromark-util-combine-extensions-2.0.1.tgz",
+      "integrity": "sha512-OnAnH8Ujmy59JcyZw8JSbK9cGpdVY44NKgSM7E9Eh7DiLS2E9RNQf0dONaGDzEG9yjEl5hcqeIsj4hfRkLH/Bg==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-chunked": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-decode-numeric-character-reference": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/micromark-util-decode-numeric-character-reference/-/micromark-util-decode-numeric-character-reference-2.0.2.tgz",
+      "integrity": "sha512-ccUbYk6CwVdkmCQMyr64dXz42EfHGkPQlBj5p7YVGzq8I7CtjXZJrubAYezf7Rp+bjPseiROqe7G6foFd+lEuw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-symbol": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-encode": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-encode/-/micromark-util-encode-2.0.1.tgz",
+      "integrity": "sha512-c3cVx2y4KqUnwopcO9b/SCdo2O67LwJJ/UyqGfbigahfegL9myoEFoDYZgkT7f36T0bLrM9hZTAaAyH+PCAXjw==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ]
+    },
+    "node_modules/micromark-util-html-tag-name": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-html-tag-name/-/micromark-util-html-tag-name-2.0.1.tgz",
+      "integrity": "sha512-2cNEiYDhCWKI+Gs9T0Tiysk136SnR13hhO8yW6BGNyhOC4qYFnwF1nKfD3HFAIXA5c45RrIG1ub11GiXeYd1xA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ]
+    },
+    "node_modules/micromark-util-normalize-identifier": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-normalize-identifier/-/micromark-util-normalize-identifier-2.0.1.tgz",
+      "integrity": "sha512-sxPqmo70LyARJs0w2UclACPUUEqltCkJ6PhKdMIDuJ3gSf/Q+/GIe3WKl0Ijb/GyH9lOpUkRAO2wp0GVkLvS9Q==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-symbol": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-resolve-all": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-resolve-all/-/micromark-util-resolve-all-2.0.1.tgz",
+      "integrity": "sha512-VdQyxFWFT2/FGJgwQnJYbe1jjQoNTS4RjglmSjTUlpUMa95Htx9NHeYW4rGDJzbjvCsl9eLjMQwGeElsqmzcHg==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-sanitize-uri": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-sanitize-uri/-/micromark-util-sanitize-uri-2.0.1.tgz",
+      "integrity": "sha512-9N9IomZ/YuGGZZmQec1MbgxtlgougxTodVwDzzEouPKo3qFWvymFHWcnDi2vzV1ff6kas9ucW+o3yzJK9YB1AQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "micromark-util-character": "^2.0.0",
+        "micromark-util-encode": "^2.0.0",
+        "micromark-util-symbol": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-subtokenize": {
+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/micromark-util-subtokenize/-/micromark-util-subtokenize-2.1.0.tgz",
+      "integrity": "sha512-XQLu552iSctvnEcgXw6+Sx75GflAPNED1qx7eBJ+wydBb2KCbRZe+NwvIEEMM83uml1+2WSXpBAcp9IUCgCYWA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ],
+      "dependencies": {
+        "devlop": "^1.0.0",
+        "micromark-util-chunked": "^2.0.0",
+        "micromark-util-symbol": "^2.0.0",
+        "micromark-util-types": "^2.0.0"
+      }
+    },
+    "node_modules/micromark-util-symbol": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/micromark-util-symbol/-/micromark-util-symbol-2.0.1.tgz",
+      "integrity": "sha512-vs5t8Apaud9N28kgCrRUdEed4UJ+wWNvicHLPxCa9ENlYuAY31M0ETy5y1vA33YoNPDFTghEbnh6efaE8h4x0Q==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ]
+    },
+    "node_modules/micromark-util-types": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/micromark-util-types/-/micromark-util-types-2.0.2.tgz",
+      "integrity": "sha512-Yw0ECSpJoViF1qTU4DC6NwtC4aWGt1EkzaQB8KPPyCRR8z9TWeV0HbEFGTO+ZY1wB22zmxnJqhPyTpOVCpeHTA==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "GitHub Sponsors",
+          "url": "https://github.com/sponsors/unifiedjs"
+        },
+        {
+          "type": "OpenCollective",
+          "url": "https://opencollective.com/unified"
+        }
+      ]
+    },
     "node_modules/mime": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/mime/-/mime-1.6.0.tgz",
@@ -1389,6 +2109,25 @@
         "opener": "bin/opener-bin.js"
       }
     },
+    "node_modules/parse-entities": {
+      "version": "4.0.2",
+      "resolved": "https://registry.npmjs.org/parse-entities/-/parse-entities-4.0.2.tgz",
+      "integrity": "sha512-GG2AQYWoLgL877gQIKeRPGO1xF9+eG1ujIb5soS5gPvLQ1y2o8FL90w2QWNdf9I361Mpp7726c+lj3U0qK1uGw==",
+      "dev": true,
+      "dependencies": {
+        "@types/unist": "^2.0.0",
+        "character-entities-legacy": "^3.0.0",
+        "character-reference-invalid": "^2.0.0",
+        "decode-named-character-reference": "^1.0.0",
+        "is-alphanumerical": "^2.0.0",
+        "is-decimal": "^2.0.0",
+        "is-hexadecimal": "^2.0.0"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/wooorm"
+      }
+    },
     "node_modules/picocolors": {
       "version": "1.1.1",
       "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.1.1.tgz",
@@ -1632,6 +2371,37 @@
       "resolved": "git+ssh://git@github.com/tanabe/Storehouse-js.git#b00842f12eb5cff267892d0e1a897e6b83f40d92",
       "license": "MIT"
     },
+    "node_modules/string-width": {
+      "version": "8.1.0",
+      "resolved": "https://registry.npmjs.org/string-width/-/string-width-8.1.0.tgz",
+      "integrity": "sha512-Kxl3KJGb/gxkaUMOjRsQ8IrXiGW75O4E3RPjFIINOVH8AMl2SQ/yWdTzWwF3FevIX9LcMAjJW+GRwAlAbTSXdg==",
+      "dev": true,
+      "dependencies": {
+        "get-east-asian-width": "^1.3.0",
+        "strip-ansi": "^7.1.0"
+      },
+      "engines": {
+        "node": ">=20"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/sindresorhus"
+      }
+    },
+    "node_modules/strip-ansi": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-7.2.0.tgz",
+      "integrity": "sha512-yDPMNjp4WyfYBkHnjIRLfca1i6KMyGCtsVgoKe/z1+6vukgaENdgGBZt+ZmKPc4gavvEZ5OgHfHdrazhgNyG7w==",
+      "dev": true,
+      "dependencies": {
+        "ansi-regex": "^6.2.2"
+      },
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://github.com/chalk/strip-ansi?sponsor=1"
+      }
+    },
     "node_modules/supports-color": {
       "version": "7.2.0",
       "resolved": "https://registry.npmjs.org/supports-color/-/supports-color-7.2.0.tgz",
diff --git a/package.json b/package.json
index f34e481..01117bc 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,8 @@
   "homepage": "https://github.com/tanabe/markdown-live-preview#readme",
   "devDependencies": {
     "http-server": "^14.1.1",
-    "vite": "^6.4.2"
+    "markdownlint": "^0.40.0",
+    "vite": "^6.4.1"
   },
   "dependencies": {
     "dompurify": "^3.4.0",
diff --git a/src/main.js b/src/main.js
index 64c180d..e1f02ea 100644
--- a/src/main.js
+++ b/src/main.js
@@ -2,6 +2,7 @@ import Storehouse from 'storehouse-js';
 import * as monaco from 'https://cdn.jsdelivr.net/npm/monaco-editor@0.52.2/+esm';
 import { marked } from 'marked';
 import DOMPurify from 'dompurify';
+import {lint as linter} from 'markdownlint/sync';
 
 const init = () => {
     let hasEdited = false;
@@ -102,7 +103,7 @@ This web site is using ${"`"}markedjs/marked${"`"}.
                 horizontal: 'visible'
             },
             wordWrap: 'on',
-            hover: { enabled: false },
+            hover: { enabled: true },
             quickSuggestions: false,
             suggestOnTriggerCharacters: false,
             folding: false
@@ -114,6 +115,7 @@ This web site is using ${"`"}markedjs/marked${"`"}.
                 hasEdited = true;
             }
             let value = editor.getValue();
+            parseByLinter(value);
             convert(value);
             saveLastContent(value);
         });
@@ -149,6 +151,58 @@ This web site is using ${"`"}markedjs/marked${"`"}.
         document.querySelector('#output').innerHTML = sanitized;
     };
 
+    // Render error or warning in the editor using linter
+    let parseByLinter = (value) => {
+        let linterOptions = {
+            "strings": {
+                "editorMarkdown": value
+            }
+        };
+        
+        const linterParseResult = linter(linterOptions);
+
+        let markers = [];
+
+        linterParseResult.editorMarkdown.forEach((element) => {
+            let errorDetails = formatLinterErrors(element);
+
+            let marker = {
+                startLineNumber: element.lineNumber,
+                endLineNumber: element.lineNumber,
+                message: errorDetails,
+                severity: monaco.MarkerSeverity.Warning;
+            }
+
+            if(element.severity.toLocaleLowerCase() === "error"){
+                marker.severity = monaco.MarkerSeverity.Error;
+            }
+
+            if(element.errorRange){
+                marker.startColumn = element.errorRange[0];
+            }
+
+            if(element.ruleInformation){
+                marker.code = {
+                  value: element.ruleNames[0],
+                  target: monaco.Uri.parse(element.ruleInformation)
+                };
+            }
+
+            markers.push(marker);
+        });
+
+        monaco.editor.setModelMarkers(editor.getModel(), "lint", markers);
+    }
+
+    let formatLinterErrors = (error) => {
+        let errorDetails = `${error.ruleNames[0]}/${error.ruleNames[1]}: ${error.ruleDescription}`;
+
+        if(error.errorDetail)
+            errorDetails += ` [${error.errorDetail}]`
+
+        return errorDetails;
+    };
+
     // Reset input text
     let reset = () => {
         let changed = editor.getValue() != defaultInput;