diff --git a/converters/rxresume-to-jsonresume.js b/converters/rxresume-to-jsonresume.js
index e7840d2..e5da40f 100644
--- a/converters/rxresume-to-jsonresume.js
+++ b/converters/rxresume-to-jsonresume.js
@@ -1,6 +1,9 @@
-import dayjs from 'dayjs';
-import { readFileSync } from 'fs';
-import objectPath from 'object-path';
+const Ajv = require('ajv')
+const ajvAddFormats = require("ajv-formats")
+const dayjs = require('dayjs')
+const fs = require('fs')
+const objectPath = require('object-path')
+const path = require('path')
 
 // defines which property in source json (value) to map to which property in JSONResume json (key).
 // the first level keys of conversionMap are the same keys in JSONResume.
@@ -210,6 +213,7 @@ function convertObject(obj, objMap, customFunc) {
   for (const [key, conversion] of Object.entries(objMap)) {
     const value = objectPath.get(obj, key)
     if (value === undefined) continue
+    if (value === "") continue
 
     if (typeof conversion === 'string') {
       result[conversion] = value
@@ -236,10 +240,27 @@ function formatDatesInResult(result) {
 /* main */
 
 // read json from file, which is the first argument
-const sourceJSON = readFileSync(process.argv[2], 'utf8')
+const sourceJSON = fs.readFileSync(process.argv[2], 'utf8')
 
 // parse json
 const source = JSON.parse(sourceJSON)
 
 const result = convert(source)
 // console.log(`result: ${JSON.stringify(result, null, 2)}`)
+
+// validate result with jsoncv schema
+const ajv = new Ajv()
+ajvAddFormats(ajv)
+const schemaPath = path.resolve(__dirname, '..', 'schema/jsoncv.schema.json')
+const schema = JSON.parse(fs.readFileSync(schemaPath))
+const valid = ajv.validate(schema, result)
+if (valid) {
+  console.log('Validation succeeded.')
+} else {
+  console.log('Validation failed:', ajv.errors)
+}
+
+// write to target file
+const targetPath = process.argv[3]
+console.log(`write to ${targetPath}`)
+fs.writeFileSync(targetPath, JSON.stringify(result, null, 2))
diff --git a/package-lock.json b/package-lock.json
index dc39565..a280c36 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -8,6 +8,8 @@
       "name": "jsoncv",
       "version": "1.0.0",
       "dependencies": {
+        "ajv": "^8.12.0",
+        "ajv-formats": "^2.1.1",
         "dayjs": "^1.11.7",
         "iconify-icon": "^1.0.0",
         "object-path": "^0.11.8"
@@ -15,6 +17,7 @@
       "devDependencies": {
         "@iconify-json/mdi": "^1.1.33",
         "@iconify/utils": "^2.0.0",
+        "ajv-cli": "^5.0.0",
         "sass": "^1.54.8",
         "vite": "^3.0.7",
         "vite-plugin-handlebars": "^1.6.0"
@@ -102,6 +105,63 @@
         "local-pkg": "^0.4.2"
       }
     },
+    "node_modules/ajv": {
+      "version": "8.12.0",
+      "resolved": "https://registry.npmjs.org/ajv/-/ajv-8.12.0.tgz",
+      "integrity": "sha512-sRu1kpcO9yLtYxBKvqfTeh9KzZEwO3STyX1HT+4CaDzC6HpTGYhIhPIzj9XuKU7KYDwnaeh5hcOwjy1QuJzBPA==",
+      "dependencies": {
+        "fast-deep-equal": "^3.1.1",
+        "json-schema-traverse": "^1.0.0",
+        "require-from-string": "^2.0.2",
+        "uri-js": "^4.2.2"
+      },
+      "funding": {
+        "type": "github",
+        "url": "https://github.com/sponsors/epoberezkin"
+      }
+    },
+    "node_modules/ajv-cli": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/ajv-cli/-/ajv-cli-5.0.0.tgz",
+      "integrity": "sha512-LY4m6dUv44HTyhV+u2z5uX4EhPYTM38Iv1jdgDJJJCyOOuqB8KtZEGjPZ2T+sh5ZIJrXUfgErYx/j3gLd3+PlQ==",
+      "dev": true,
+      "dependencies": {
+        "ajv": "^8.0.0",
+        "fast-json-patch": "^2.0.0",
+        "glob": "^7.1.0",
+        "js-yaml": "^3.14.0",
+        "json-schema-migrate": "^2.0.0",
+        "json5": "^2.1.3",
+        "minimist": "^1.2.0"
+      },
+      "bin": {
+        "ajv": "dist/index.js"
+      },
+      "peerDependencies": {
+        "ts-node": ">=9.0.0"
+      },
+      "peerDependenciesMeta": {
+        "ts-node": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/ajv-formats": {
+      "version": "2.1.1",
+      "resolved": "https://registry.npmjs.org/ajv-formats/-/ajv-formats-2.1.1.tgz",
+      "integrity": "sha512-Wx0Kx52hxE7C18hkMEggYlEifqWZtYaRgouJor+WMdPnQyEK13vgEWyVNup7SoeeoLMsr4kf5h6dOW11I15MUA==",
+      "dependencies": {
+        "ajv": "^8.0.0"
+      },
+      "peerDependencies": {
+        "ajv": "^8.0.0"
+      },
+      "peerDependenciesMeta": {
+        "ajv": {
+          "optional": true
+        }
+      }
+    },
     "node_modules/anymatch": {
       "version": "3.1.2",
       "resolved": "https://registry.npmjs.org/anymatch/-/anymatch-3.1.2.tgz",
@@ -115,6 +175,21 @@
         "node": ">= 8"
       }
     },
+    "node_modules/argparse": {
+      "version": "1.0.10",
+      "resolved": "https://registry.npmjs.org/argparse/-/argparse-1.0.10.tgz",
+      "integrity": "sha512-o5Roy6tNG4SL/FOkCAN6RzjiakZS25RLYFrcMttJqbdd8BWrnA+fGz57iN5Pb06pvBGvl5gQ0B48dJlslXvoTg==",
+      "dev": true,
+      "dependencies": {
+        "sprintf-js": "~1.0.2"
+      }
+    },
+    "node_modules/balanced-match": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
+      "integrity": "sha512-3oSeUO0TMV67hN1AmbXsK4yaqU7tjiHlbxRDZOpH0KW9+CeX4bRAaX0Anxt0tx2MrpRpWwQaPwIlISEJhYU5Pw==",
+      "dev": true
+    },
     "node_modules/binary-extensions": {
       "version": "2.2.0",
       "resolved": "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz",
@@ -124,6 +199,16 @@
         "node": ">=8"
       }
     },
+    "node_modules/brace-expansion": {
+      "version": "1.1.11",
+      "resolved": "https://registry.npmjs.org/brace-expansion/-/brace-expansion-1.1.11.tgz",
+      "integrity": "sha512-iCuPHDFgrHX7H2vEI/5xpz07zSHB00TpugqhmYtVmMO6518mCuRMoOYFldEBl0g187ufozdaHgWKcYFb61qGiA==",
+      "dev": true,
+      "dependencies": {
+        "balanced-match": "^1.0.0",
+        "concat-map": "0.0.1"
+      }
+    },
     "node_modules/braces": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/braces/-/braces-3.0.2.tgz",
@@ -163,6 +248,12 @@
         "fsevents": "~2.3.2"
       }
     },
+    "node_modules/concat-map": {
+      "version": "0.0.1",
+      "resolved": "https://registry.npmjs.org/concat-map/-/concat-map-0.0.1.tgz",
+      "integrity": "sha512-/Srv4dswyQNBfohGpz9o6Yb3Gz3SrUDqBH5rTuhGR7ahtlbYKnVxw2bCFMRljaA7EXHaXZ8wsHdodFvbkhKmqg==",
+      "dev": true
+    },
     "node_modules/cross-spawn": {
       "version": "7.0.3",
       "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
@@ -556,6 +647,19 @@
         "node": ">=12"
       }
     },
+    "node_modules/esprima": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
+      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A==",
+      "dev": true,
+      "bin": {
+        "esparse": "bin/esparse.js",
+        "esvalidate": "bin/esvalidate.js"
+      },
+      "engines": {
+        "node": ">=4"
+      }
+    },
     "node_modules/execa": {
       "version": "5.1.1",
       "resolved": "https://registry.npmjs.org/execa/-/execa-5.1.1.tgz",
@@ -579,6 +683,29 @@
         "url": "https://github.com/sindresorhus/execa?sponsor=1"
       }
     },
+    "node_modules/fast-deep-equal": {
+      "version": "3.1.3",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz",
+      "integrity": "sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q=="
+    },
+    "node_modules/fast-json-patch": {
+      "version": "2.2.1",
+      "resolved": "https://registry.npmjs.org/fast-json-patch/-/fast-json-patch-2.2.1.tgz",
+      "integrity": "sha512-4j5uBaTnsYAV5ebkidvxiLUYOwjQ+JSFljeqfTxCrH9bDmlCQaOJFS84oDJ2rAXZq2yskmk3ORfoP9DCwqFNig==",
+      "dev": true,
+      "dependencies": {
+        "fast-deep-equal": "^2.0.1"
+      },
+      "engines": {
+        "node": ">= 0.4.0"
+      }
+    },
+    "node_modules/fast-json-patch/node_modules/fast-deep-equal": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz",
+      "integrity": "sha512-bCK/2Z4zLidyB4ReuIsvALH6w31YfAQDmXMqMx6FyfHqvBxtjC0eRumeSu4Bs3XtXwpyIywtSTrVT99BxY1f9w==",
+      "dev": true
+    },
     "node_modules/fill-range": {
       "version": "7.0.1",
       "resolved": "https://registry.npmjs.org/fill-range/-/fill-range-7.0.1.tgz",
@@ -607,6 +734,12 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/fs.realpath": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/fs.realpath/-/fs.realpath-1.0.0.tgz",
+      "integrity": "sha512-OO0pH2lK6a0hZnAdau5ItzHPI6pUlvI7jMVnxUQRtw4owF2wk8lOSabtGDCTP4Ggrg2MbGnWO9X8K1t4+fGMDw==",
+      "dev": true
+    },
     "node_modules/fsevents": {
       "version": "2.3.2",
       "resolved": "https://registry.npmjs.org/fsevents/-/fsevents-2.3.2.tgz",
@@ -639,6 +772,26 @@
         "url": "https://github.com/sponsors/sindresorhus"
       }
     },
+    "node_modules/glob": {
+      "version": "7.2.3",
+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
+      "integrity": "sha512-nFR0zLpU2YCaRxwoCJvL6UvCH2JFyFVIvwTLsIf21AuHlMskA1hhTdk+LlYJtOlYt9v6dvszD2BGRqBL+iQK9Q==",
+      "dev": true,
+      "dependencies": {
+        "fs.realpath": "^1.0.0",
+        "inflight": "^1.0.4",
+        "inherits": "2",
+        "minimatch": "^3.1.1",
+        "once": "^1.3.0",
+        "path-is-absolute": "^1.0.0"
+      },
+      "engines": {
+        "node": "*"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/isaacs"
+      }
+    },
     "node_modules/glob-parent": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/glob-parent/-/glob-parent-5.1.2.tgz",
@@ -710,6 +863,22 @@
       "integrity": "sha512-oNkuqVTA8jqG1Q6c+UglTOD1xhC1BtjKI7XkCXRkZHrN5m18/XsnUp8Q89GkQO/z+0WjonSvl0FLhDYftp46nQ==",
       "dev": true
     },
+    "node_modules/inflight": {
+      "version": "1.0.6",
+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
+      "integrity": "sha512-k92I/b08q4wvFscXCLvqfsHCrjrF7yiXsQuIVvVE7N82W3+aqpzuUdBbfhWcy/FZR3/4IgflMgKLOsvPDrGCJA==",
+      "dev": true,
+      "dependencies": {
+        "once": "^1.3.0",
+        "wrappy": "1"
+      }
+    },
+    "node_modules/inherits": {
+      "version": "2.0.4",
+      "resolved": "https://registry.npmjs.org/inherits/-/inherits-2.0.4.tgz",
+      "integrity": "sha512-k/vGaX4/Yla3WzyMCvTQOXYeIHvqOKtnqBduzTHpzpQZzAskKMhZ2K+EnBiSM9zGSoIFeMpXKxa4dYeZIQqewQ==",
+      "dev": true
+    },
     "node_modules/is-binary-path": {
       "version": "2.1.0",
       "resolved": "https://registry.npmjs.org/is-binary-path/-/is-binary-path-2.1.0.tgz",
@@ -782,6 +951,45 @@
       "integrity": "sha512-RHxMLp9lnKHGHRng9QFhRCMbYAcVpn69smSGcq3f36xjgVVWThj4qqLbTLlq7Ssj8B+fIQ1EuCEGI2lKsyQeIw==",
       "dev": true
     },
+    "node_modules/js-yaml": {
+      "version": "3.14.1",
+      "resolved": "https://registry.npmjs.org/js-yaml/-/js-yaml-3.14.1.tgz",
+      "integrity": "sha512-okMH7OXXJ7YrN9Ok3/SXrnu4iX9yOk+25nqX4imS2npuvTYDmo/QEZoqwZkYaIDk3jVvBOTOIEgEhaLOynBS9g==",
+      "dev": true,
+      "dependencies": {
+        "argparse": "^1.0.7",
+        "esprima": "^4.0.0"
+      },
+      "bin": {
+        "js-yaml": "bin/js-yaml.js"
+      }
+    },
+    "node_modules/json-schema-migrate": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/json-schema-migrate/-/json-schema-migrate-2.0.0.tgz",
+      "integrity": "sha512-r38SVTtojDRp4eD6WsCqiE0eNDt4v1WalBXb9cyZYw9ai5cGtBwzRNWjHzJl38w6TxFkXAIA7h+fyX3tnrAFhQ==",
+      "dev": true,
+      "dependencies": {
+        "ajv": "^8.0.0"
+      }
+    },
+    "node_modules/json-schema-traverse": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
+      "integrity": "sha512-NM8/P9n3XjXhIZn1lLhkFaACTOURQXjWhV4BA/RnOv8xvgqtqpAX9IO4mRQxSx1Rlo4tqzeqb0sOlruaOy3dug=="
+    },
+    "node_modules/json5": {
+      "version": "2.2.3",
+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
+      "integrity": "sha512-XmOWe7eyHYH14cLdVPoyg+GOH3rYX++KpzrylJwSW98t3Nk+U8XOl8FWKOgwtzdb8lXGf6zYwDUzeHMWfxasyg==",
+      "dev": true,
+      "bin": {
+        "json5": "lib/cli.js"
+      },
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/kolorist": {
       "version": "1.6.0",
       "resolved": "https://registry.npmjs.org/kolorist/-/kolorist-1.6.0.tgz",
@@ -830,6 +1038,18 @@
         "node": ">=6"
       }
     },
+    "node_modules/minimatch": {
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
+      "integrity": "sha512-J7p63hRiAjw1NDEww1W7i37+ByIrOWO5XQQAzZ3VOcL0PNybwpfmV/N05zFAzwQ9USyEcX6t3UO+K5aqBQOIHw==",
+      "dev": true,
+      "dependencies": {
+        "brace-expansion": "^1.1.7"
+      },
+      "engines": {
+        "node": "*"
+      }
+    },
     "node_modules/minimist": {
       "version": "1.2.6",
       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.6.tgz",
@@ -889,6 +1109,15 @@
         "node": ">= 10.12.0"
       }
     },
+    "node_modules/once": {
+      "version": "1.4.0",
+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
+      "integrity": "sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==",
+      "dev": true,
+      "dependencies": {
+        "wrappy": "1"
+      }
+    },
     "node_modules/onetime": {
       "version": "5.1.2",
       "resolved": "https://registry.npmjs.org/onetime/-/onetime-5.1.2.tgz",
@@ -943,6 +1172,15 @@
         "node": ">=8"
       }
     },
+    "node_modules/path-is-absolute": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
+      "integrity": "sha512-AVbw3UJ2e9bq64vSaS9Am0fje1Pa8pbGqTTsmXfaIiMpnr5DlDhfJOuLj9Sf95ZPVDAUerDfEk88MPmPe7UCQg==",
+      "dev": true,
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/path-key": {
       "version": "3.1.1",
       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -1000,6 +1238,14 @@
         "node": "^10 || ^12 || >=14"
       }
     },
+    "node_modules/punycode": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.0.tgz",
+      "integrity": "sha512-rRV+zQD8tVFys26lAGR9WUuS4iUAngJScM+ZRSKtvl5tKeZ2t5bvdNFdNHBW9FWR4guGHlgmsZ1G7BSm2wTbuA==",
+      "engines": {
+        "node": ">=6"
+      }
+    },
     "node_modules/readdirp": {
       "version": "3.6.0",
       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@@ -1012,6 +1258,14 @@
         "node": ">=8.10.0"
       }
     },
+    "node_modules/require-from-string": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
+      "integrity": "sha512-Xf0nWe6RseziFMu+Ap9biiUbmplq6S9/p+7w7YXP/JBHhrUDDUhwa+vANyubuqfZWTveU//DYVGsDG7RKL/vEw==",
+      "engines": {
+        "node": ">=0.10.0"
+      }
+    },
     "node_modules/resolve": {
       "version": "1.22.1",
       "resolved": "https://registry.npmjs.org/resolve/-/resolve-1.22.1.tgz",
@@ -1106,6 +1360,12 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/sprintf-js": {
+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
+      "integrity": "sha512-D9cPgkvLlV3t3IzL0D0YLvGA9Ahk4PcvVwUbN0dSGr1aP0Nrt4AEnTUbuGvquEC0mA64Gqt1fzirlRs5ibXx8g==",
+      "dev": true
+    },
     "node_modules/strip-final-newline": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/strip-final-newline/-/strip-final-newline-2.0.0.tgz",
@@ -1152,6 +1412,14 @@
         "node": ">=0.8.0"
       }
     },
+    "node_modules/uri-js": {
+      "version": "4.4.1",
+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
+      "integrity": "sha512-7rKUyy33Q1yc98pQ1DAmLtwX109F7TIfWlW1Ydo8Wl1ii1SeHieeh0HHfPeL2fMXK6z0s8ecKs9frCuLJvndBg==",
+      "dependencies": {
+        "punycode": "^2.1.0"
+      }
+    },
     "node_modules/vite": {
       "version": "3.1.4",
       "resolved": "https://registry.npmjs.org/vite/-/vite-3.1.4.tgz",
@@ -1648,6 +1916,12 @@
       "integrity": "sha512-gvVzJFlPycKc5dZN4yPkP8w7Dc37BtP1yczEneOb4uq34pXZcvrtRTmWV8W+Ume+XCxKgbjM+nevkyFPMybd4Q==",
       "dev": true
     },
+    "node_modules/wrappy": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
+      "integrity": "sha512-l4Sp/DRseor9wL6EvV2+TuQn63dMkPjZ/sp9XkghTEbV9KlPS1xUsZ3u7/IQO4wxtcFB4bgpQPRcR3QCvezPcQ==",
+      "dev": true
+    },
     "node_modules/yocto-queue": {
       "version": "0.1.0",
       "resolved": "https://registry.npmjs.org/yocto-queue/-/yocto-queue-0.1.0.tgz",
@@ -1720,6 +1994,40 @@
         "local-pkg": "^0.4.2"
       }
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@@ -1730,12 +2038,37 @@
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@@ -1761,6 +2094,12 @@
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@@ -1956,6 +2295,12 @@
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@@ -1973,6 +2318,28 @@
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@@ -1992,6 +2359,12 @@
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+      "resolved": "https://registry.npmjs.org/glob/-/glob-7.2.3.tgz",
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+        "minimatch": "^3.1.1",
+        "once": "^1.3.0",
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+      "resolved": "https://registry.npmjs.org/inflight/-/inflight-1.0.6.tgz",
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+      "resolved": "https://registry.npmjs.org/json-schema-migrate/-/json-schema-migrate-2.0.0.tgz",
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+      "requires": {
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+      "resolved": "https://registry.npmjs.org/json-schema-traverse/-/json-schema-traverse-1.0.0.tgz",
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+      "resolved": "https://registry.npmjs.org/json5/-/json5-2.2.3.tgz",
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+      "resolved": "https://registry.npmjs.org/minimatch/-/minimatch-3.1.2.tgz",
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+      "requires": {
+        "brace-expansion": "^1.1.7"
+      }
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       "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.6.tgz",
@@ -2190,6 +2632,15 @@
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+      "resolved": "https://registry.npmjs.org/once/-/once-1.4.0.tgz",
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@@ -2223,6 +2674,12 @@
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+    "path-is-absolute": {
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+      "resolved": "https://registry.npmjs.org/path-is-absolute/-/path-is-absolute-1.0.1.tgz",
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+    },
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       "resolved": "https://registry.npmjs.org/path-key/-/path-key-3.1.1.tgz",
@@ -2258,6 +2715,11 @@
         "source-map-js": "^1.0.2"
       }
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+    "punycode": {
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+      "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.0.tgz",
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       "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-3.6.0.tgz",
@@ -2267,6 +2729,11 @@
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       }
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+      "resolved": "https://registry.npmjs.org/require-from-string/-/require-from-string-2.0.2.tgz",
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       "dev": true
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+    "sprintf-js": {
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+      "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
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@@ -2359,6 +2832,14 @@
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       "optional": true
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+      "resolved": "https://registry.npmjs.org/uri-js/-/uri-js-4.4.1.tgz",
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+      "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
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diff --git a/package.json b/package.json
index d67c5b4..3172a37 100644
--- a/package.json
+++ b/package.json
@@ -2,7 +2,6 @@
   "name": "jsoncv",
   "private": true,
   "version": "1.0.0",
-  "type": "module",
   "scripts": {
     "dev": "vite --host",
     "build": "vite build",
@@ -11,11 +10,14 @@
   "devDependencies": {
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     "@iconify/utils": "^2.0.0",
+    "ajv-cli": "^5.0.0",
     "sass": "^1.54.8",
     "vite": "^3.0.7",
     "vite-plugin-handlebars": "^1.6.0"
   },
   "dependencies": {
+    "ajv": "^8.12.0",
+    "ajv-formats": "^2.1.1",
     "dayjs": "^1.11.7",
     "iconify-icon": "^1.0.0",
     "object-path": "^0.11.8"