diff --git a/changelog_unreleased/json/14083.md b/changelog_unreleased/json/14083.md
new file mode 100644
index 000000000000..0ab6322f8317
--- /dev/null
+++ b/changelog_unreleased/json/14083.md
@@ -0,0 +1,17 @@
+#### Quote numeric keys for json-stringify parser (#14083 by @fisker)
+
+<!-- prettier-ignore -->
+```jsx
+// Input
+{0: 'value'}
+
+// Prettier stable
+{
+  0: "value"
+}
+
+// Prettier main
+{
+  "0": "value"
+}
+```
diff --git a/src/language-js/printer-estree-json.js b/src/language-js/printer-estree-json.js
index d3bc27c510c3..b0f8cf2c05ab 100644
--- a/src/language-js/printer-estree-json.js
+++ b/src/language-js/printer-estree-json.js
@@ -48,15 +48,13 @@ function genericPrint(path, options, print) {
     case "BooleanLiteral":
       return node.value ? "true" : "false";
     case "StringLiteral":
-    case "NumericLiteral":
       return JSON.stringify(node.value);
-    case "Identifier": {
-      const parent = path.getParentNode();
-      if (parent && parent.type === "ObjectProperty" && parent.key === node) {
-        return JSON.stringify(node.name);
-      }
-      return node.name;
-    }
+    case "NumericLiteral":
+      return isObjectKey(path)
+        ? JSON.stringify(String(node.value))
+        : JSON.stringify(node.value);
+    case "Identifier":
+      return isObjectKey(path) ? JSON.stringify(node.name) : node.name;
     case "TemplateLiteral":
       // There is only one `TemplateElement`
       return print(["quasis", 0]);
@@ -68,6 +66,12 @@ function genericPrint(path, options, print) {
   }
 }
 
+function isObjectKey(path) {
+  return (
+    path.getName() === "key" && path.getParentNode().type === "ObjectProperty"
+  );
+}
+
 const ignoredProperties = new Set([
   "start",
   "end",
@@ -85,8 +89,13 @@ const ignoredProperties = new Set([
 function clean(node, newNode /*, parent*/) {
   const { type } = node;
   // We print quoted key
-  if (type === "ObjectProperty" && node.key.type === "Identifier") {
-    newNode.key = { type: "StringLiteral", value: node.key.name };
+  if (type === "ObjectProperty") {
+    const { key } = node;
+    if (key.type === "Identifier") {
+      newNode.key = { type: "StringLiteral", value: key.name };
+    } else if (key.type === "NumericLiteral") {
+      newNode.key = { type: "StringLiteral", value: String(key.value) };
+    }
     return;
   }
   if (type === "UnaryExpression" && node.operator === "+") {
diff --git a/tests/format/json/json/__snapshots__/jsfmt.spec.js.snap b/tests/format/json/json/__snapshots__/jsfmt.spec.js.snap
index 445b92e02841..036112b18023 100644
--- a/tests/format/json/json/__snapshots__/jsfmt.spec.js.snap
+++ b/tests/format/json/json/__snapshots__/jsfmt.spec.js.snap
@@ -2175,12 +2175,54 @@ trailingComma: "all"
                                                                                 | printWidth
 =====================================input======================================
 {
-    a: 123
+    a: '',
+    null: '',
+    true: '',
+    "string": "",
+    0: '',
+    1e2: '',
+    1.0e+2: '',
+    .10e+2: '',
+    1e-2: '',
+    .1e-2: '',
+    0.1e+2: '',
+    1.0: '',
+    1.00000: '',
+    .1: '',
+    .100000: '',
+    0.1: '',
+    0.100000: '',
+    999999999999999999999999999999: '',
+    .000000000000000000000000000001: '',
+    0.000000000000000000000000000001: '',
+    1e999999999999999999999999999999: '',
+    1_2_3: '',
 }
 
 =====================================output=====================================
 {
-  "a": 123
+  "a": "",
+  "null": "",
+  "true": "",
+  "string": "",
+  "0": "",
+  1e2: "",
+  1.0e2: "",
+  0.1e2: "",
+  1e-2: "",
+  0.1e-2: "",
+  0.1e2: "",
+  1.0: "",
+  1.0: "",
+  "0.1": "",
+  "0.1": "",
+  "0.1": "",
+  "0.1": "",
+  999999999999999999999999999999: "",
+  0.000000000000000000000000000001: "",
+  0.000000000000000000000000000001: "",
+  1e999999999999999999999999999999: "",
+  1_2_3: ""
 }
 
 ================================================================================
@@ -2194,12 +2236,54 @@ trailingComma: "all"
                                                                                 | printWidth
 =====================================input======================================
 {
-    a: 123
+    a: '',
+    null: '',
+    true: '',
+    "string": "",
+    0: '',
+    1e2: '',
+    1.0e+2: '',
+    .10e+2: '',
+    1e-2: '',
+    .1e-2: '',
+    0.1e+2: '',
+    1.0: '',
+    1.00000: '',
+    .1: '',
+    .100000: '',
+    0.1: '',
+    0.100000: '',
+    999999999999999999999999999999: '',
+    .000000000000000000000000000001: '',
+    0.000000000000000000000000000001: '',
+    1e999999999999999999999999999999: '',
+    1_2_3: '',
 }
 
 =====================================output=====================================
 {
-  a: 123,
+  a: "",
+  null: "",
+  true: "",
+  string: "",
+  0: "",
+  1e2: "",
+  1.0e2: "",
+  0.1e2: "",
+  1e-2: "",
+  0.1e-2: "",
+  0.1e2: "",
+  1.0: "",
+  1.0: "",
+  0.1: "",
+  0.1: "",
+  0.1: "",
+  0.1: "",
+  999999999999999999999999999999: "",
+  0.000000000000000000000000000001: "",
+  0.000000000000000000000000000001: "",
+  1e999999999999999999999999999999: "",
+  1_2_3: "",
 }
 
 ================================================================================
@@ -2212,12 +2296,54 @@ printWidth: 80
                                                                                 | printWidth
 =====================================input======================================
 {
-    a: 123
+    a: '',
+    null: '',
+    true: '',
+    "string": "",
+    0: '',
+    1e2: '',
+    1.0e+2: '',
+    .10e+2: '',
+    1e-2: '',
+    .1e-2: '',
+    0.1e+2: '',
+    1.0: '',
+    1.00000: '',
+    .1: '',
+    .100000: '',
+    0.1: '',
+    0.100000: '',
+    999999999999999999999999999999: '',
+    .000000000000000000000000000001: '',
+    0.000000000000000000000000000001: '',
+    1e999999999999999999999999999999: '',
+    1_2_3: '',
 }
 
 =====================================output=====================================
 {
-  "a": 123
+  "a": "",
+  "null": "",
+  "true": "",
+  "string": "",
+  "0": "",
+  1e2: "",
+  1.0e2: "",
+  0.1e2: "",
+  1e-2: "",
+  0.1e-2: "",
+  0.1e2: "",
+  1.0: "",
+  1.0: "",
+  "0.1": "",
+  "0.1": "",
+  "0.1": "",
+  "0.1": "",
+  999999999999999999999999999999: "",
+  0.000000000000000000000000000001: "",
+  0.000000000000000000000000000001: "",
+  1e999999999999999999999999999999: "",
+  1_2_3: ""
 }
 
 ================================================================================
@@ -2230,12 +2356,54 @@ printWidth: 80
                                                                                 | printWidth
 =====================================input======================================
 {
-    a: 123
+    a: '',
+    null: '',
+    true: '',
+    "string": "",
+    0: '',
+    1e2: '',
+    1.0e+2: '',
+    .10e+2: '',
+    1e-2: '',
+    .1e-2: '',
+    0.1e+2: '',
+    1.0: '',
+    1.00000: '',
+    .1: '',
+    .100000: '',
+    0.1: '',
+    0.100000: '',
+    999999999999999999999999999999: '',
+    .000000000000000000000000000001: '',
+    0.000000000000000000000000000001: '',
+    1e999999999999999999999999999999: '',
+    1_2_3: '',
 }
 
 =====================================output=====================================
 {
-  a: 123,
+  a: "",
+  null: "",
+  true: "",
+  string: "",
+  0: "",
+  1e2: "",
+  1.0e2: "",
+  0.1e2: "",
+  1e-2: "",
+  0.1e-2: "",
+  0.1e2: "",
+  1.0: "",
+  1.0: "",
+  0.1: "",
+  0.1: "",
+  0.1: "",
+  0.1: "",
+  999999999999999999999999999999: "",
+  0.000000000000000000000000000001: "",
+  0.000000000000000000000000000001: "",
+  1e999999999999999999999999999999: "",
+  1_2_3: "",
 }
 
 ================================================================================
@@ -2248,12 +2416,54 @@ printWidth: 80
                                                                                 | printWidth
 =====================================input======================================
 {
-    a: 123
+    a: '',
+    null: '',
+    true: '',
+    "string": "",
+    0: '',
+    1e2: '',
+    1.0e+2: '',
+    .10e+2: '',
+    1e-2: '',
+    .1e-2: '',
+    0.1e+2: '',
+    1.0: '',
+    1.00000: '',
+    .1: '',
+    .100000: '',
+    0.1: '',
+    0.100000: '',
+    999999999999999999999999999999: '',
+    .000000000000000000000000000001: '',
+    0.000000000000000000000000000001: '',
+    1e999999999999999999999999999999: '',
+    1_2_3: '',
 }
 
 =====================================output=====================================
 {
-  "a": 123
+  "a": "",
+  "null": "",
+  "true": "",
+  "string": "",
+  "0": "",
+  "100": "",
+  "100": "",
+  "10": "",
+  "0.01": "",
+  "0.001": "",
+  "10": "",
+  "1": "",
+  "1": "",
+  "0.1": "",
+  "0.1": "",
+  "0.1": "",
+  "0.1": "",
+  "1e+30": "",
+  "1e-30": "",
+  "1e-30": "",
+  "Infinity": "",
+  "123": ""
 }
 
 ================================================================================
diff --git a/tests/format/json/json/propertyKey.json b/tests/format/json/json/propertyKey.json
index 399e7b9a6531..12d3f130e6ac 100644
--- a/tests/format/json/json/propertyKey.json
+++ b/tests/format/json/json/propertyKey.json
@@ -1,3 +1,24 @@
 {
-    a: 123
+    a: '',
+    null: '',
+    true: '',
+    "string": "",
+    0: '',
+    1e2: '',
+    1.0e+2: '',
+    .10e+2: '',
+    1e-2: '',
+    .1e-2: '',
+    0.1e+2: '',
+    1.0: '',
+    1.00000: '',
+    .1: '',
+    .100000: '',
+    0.1: '',
+    0.100000: '',
+    999999999999999999999999999999: '',
+    .000000000000000000000000000001: '',
+    0.000000000000000000000000000001: '',
+    1e999999999999999999999999999999: '',
+    1_2_3: '',
 }