diff --git a/frontend/src/lib/components/RunForm.svelte b/frontend/src/lib/components/RunForm.svelte
index a818e0a66b..c994acc348 100644
--- a/frontend/src/lib/components/RunForm.svelte
+++ b/frontend/src/lib/components/RunForm.svelte
@@ -67,7 +67,15 @@
 
 	export let isValid = true
 
-	$: window.location.hash = computeSharableHash(args)
+	$: onArgsChange(args)
+
+	function onArgsChange(args: any) {
+		try {
+			window.location.hash = computeSharableHash(args)
+		} catch (e) {
+			console.error('Impossible to set hash in args', e)
+		}
+	}
 </script>
 
 <div class="max-w-3xl">
diff --git a/frontend/src/lib/utils.ts b/frontend/src/lib/utils.ts
index 42a18e7152..373a64886f 100644
--- a/frontend/src/lib/utils.ts
+++ b/frontend/src/lib/utils.ts
@@ -670,12 +670,18 @@ export function extractCustomProperties(styleStr: string): string {
 
 export function computeSharableHash(args: any) {
 	let nargs = {}
-	Object.entries(args).forEach(([k, v]) => {
+	for (let k in args) {
+		let v = args[k]
 		if (v !== undefined) {
 			// if
+			let size = roughSizeOfObject(v) > 1000000
+			if (size) {
+				console.error(`Value at key ${k} too big (${size}) to be shared`)
+				return ''
+			}
 			nargs[k] = JSON.stringify(v)
 		}
-	})
+	}
 	try {
 		let r = new URLSearchParams(nargs).toString()
 		return r.length > 1000000 ? '' : r