diff --git a/packages/editor/src/behaviors/behavior.links.ts b/packages/editor/src/behaviors/behavior.links.ts
index ee68fb04..51a0cb00 100644
--- a/packages/editor/src/behaviors/behavior.links.ts
+++ b/packages/editor/src/behaviors/behavior.links.ts
@@ -1,5 +1,6 @@
 import type {EditorSchema} from '../editor/define-schema'
 import * as selectors from '../selectors'
+import {looksLikeUrl} from '../utils/looks-like-url'
 import {defineBehavior} from './behavior.types'
 
 /**
@@ -80,12 +81,3 @@ export function createLinkBehaviors(config: LinkBehaviorsConfig) {
 
   return linkBehaviors
 }
-
-function looksLikeUrl(text: string) {
-  let looksLikeUrl = false
-  try {
-    new URL(text)
-    looksLikeUrl = true
-  } catch {}
-  return looksLikeUrl
-}
diff --git a/packages/editor/src/utils/looks-like-url.test.ts b/packages/editor/src/utils/looks-like-url.test.ts
new file mode 100644
index 00000000..30b7d437
--- /dev/null
+++ b/packages/editor/src/utils/looks-like-url.test.ts
@@ -0,0 +1,13 @@
+import {expect, test} from 'vitest'
+import {looksLikeUrl} from './looks-like-url'
+
+test(looksLikeUrl.name, () => {
+  expect(looksLikeUrl('https://example.com')).toBe(true)
+  expect(looksLikeUrl('http://example.com')).toBe(true)
+  expect(looksLikeUrl('example.com')).toBe(true)
+  expect(looksLikeUrl('mailto:foo@example.com')).toBe(true)
+  expect(looksLikeUrl('tel:+123456789')).toBe(true)
+  expect(looksLikeUrl('http://example')).toBe(false)
+  expect(looksLikeUrl('http:example')).toBe(false)
+  expect(looksLikeUrl('a:b')).toBe(false)
+})
diff --git a/packages/editor/src/utils/looks-like-url.ts b/packages/editor/src/utils/looks-like-url.ts
new file mode 100644
index 00000000..98c1d77e
--- /dev/null
+++ b/packages/editor/src/utils/looks-like-url.ts
@@ -0,0 +1,31 @@
+export function looksLikeUrl(text: string) {
+  let looksLikeUrl = false
+  try {
+    try {
+      const url = new URL(text)
+
+      if (!sensibleProtocols.includes(url.protocol)) {
+        return false
+      }
+
+      const probablyHasTld =
+        url.hostname.length > 0 ? url.hostname.includes('.') : true
+
+      looksLikeUrl = probablyHasTld
+    } catch {
+      const url = new URL(`https://${text}`)
+
+      if (!sensibleProtocols.includes(url.protocol)) {
+        return false
+      }
+
+      const probablyHasTld =
+        url.hostname.length > 0 ? url.hostname.includes('.') : true
+
+      looksLikeUrl = probablyHasTld
+    }
+  } catch {}
+  return looksLikeUrl
+}
+
+const sensibleProtocols = ['http:', 'https:', 'mailto:', 'tel:']