diff --git a/frontend/src/lib/components/InputTransformForm.svelte b/frontend/src/lib/components/InputTransformForm.svelte
index fdf354da96..c14a89da7b 100644
--- a/frontend/src/lib/components/InputTransformForm.svelte
+++ b/frontend/src/lib/components/InputTransformForm.svelte
@@ -38,6 +38,7 @@
 	import { twMerge } from 'tailwind-merge'
 	import FlowPlugConnect from './FlowPlugConnect.svelte'
 	import { deepEqual } from 'fast-equals'
+	import S3ArrayHelperButton from './S3ArrayHelperButton.svelte'
 
 	interface Props {
 		schema: Schema | { properties?: Record<string, any>; required?: string[] }
@@ -241,6 +242,51 @@
 		return inputCat === 'string' || inputCat === 'sql' || inputCat == 'yaml'
 	}
 
+	function appendPathToArrayExpr(currentExpr: string | undefined, path: string) {
+		const trimmedExpr = currentExpr?.trim() || ''
+
+		let newExpr = trimmedExpr
+		if (trimmedExpr.startsWith('[') && trimmedExpr.endsWith(']')) {
+			// Parse existing array and append new item
+			const innerContent = trimmedExpr.slice(1, -1).trim()
+			if (innerContent) {
+				newExpr = `[${innerContent}, ${path}]`
+			} else {
+				newExpr = `[${path}]`
+			}
+		} else {
+			// Create new array with single item
+			newExpr = `[${path}]`
+		}
+		arg.expr = newExpr
+		arg.type = 'javascript'
+
+		// Update Monaco editor after setting the expression
+		tick().then(() => {
+			monaco?.setCode(newExpr)
+		})
+
+		// Dispatch change
+		dispatch('change', { argName, arg })
+	}
+
+	async function switchToJsAndConnect(onPath: (path: string) => void) {
+		// Switch to JavaScript mode
+		propertyType = 'javascript'
+		arg.type = 'javascript'
+		arg.expr = arg.expr || '[]'
+		arg.value = undefined
+
+		// Wait for the component to re-render and Monaco to be available
+		await tick()
+
+		// Activate connect mode
+		focusProp?.(argName, 'connect', (path) => {
+			onPath(path)
+			return true
+		})
+	}
+
 	function connectProperty(rawValue: string) {
 		// Extract path from variable('x') or resource('x') format
 		const varMatch = variableMatch(rawValue)
@@ -416,6 +462,10 @@
 	let connecting = $derived(
 		$propPickerConfig?.propName == argName && $propPickerConfig?.insertionMode == 'connect'
 	)
+	let shouldShowS3ArrayHelper = $derived(
+		inputCat === 'list' &&
+			['s3object', 's3_object'].includes(schema?.properties?.[argName]?.items?.resourceType)
+	)
 </script>
 
 {#if arg != undefined && !hidden}
@@ -492,6 +542,7 @@
 							on:selected={(e) => {
 								if (e.detail == propertyType) return
 								const staticTemplate = isStaticTemplate(inputCat)
+
 								if (e.detail === 'javascript') {
 									if (arg.expr == undefined) {
 										arg.expr = getDefaultExpr(
@@ -683,6 +734,14 @@
 							bind:title={schema.properties[argName].title}
 							bind:placeholder={schema.properties[argName].placeholder}
 						/>
+
+						{#if shouldShowS3ArrayHelper}
+							<S3ArrayHelperButton
+								{connecting}
+								onClick={() =>
+									switchToJsAndConnect((path) => appendPathToArrayExpr(arg.expr, path))}
+							/>
+						{/if}
 					{:else if arg.expr != undefined}
 						<div class="border mt-2">
 							<SimpleEditor
@@ -712,6 +771,18 @@
 						{#if !hideHelpButton}
 							<DynamicInputHelpBox />
 						{/if}
+
+						{#if shouldShowS3ArrayHelper}
+							<S3ArrayHelperButton
+								{connecting}
+								onClick={() =>
+									focusProp?.(argName, 'connect', (path) => {
+										appendPathToArrayExpr(arg.expr, path)
+										return true
+									})}
+							/>
+						{/if}
+
 						<div class="mb-2"></div>
 					{:else}
 						Not recognized input type {argName} ({arg.expr}, {propertyType})
diff --git a/frontend/src/lib/components/S3ArrayHelperButton.svelte b/frontend/src/lib/components/S3ArrayHelperButton.svelte
new file mode 100644
index 0000000000..2ea6450602
--- /dev/null
+++ b/frontend/src/lib/components/S3ArrayHelperButton.svelte
@@ -0,0 +1,20 @@
+<script lang="ts">
+	import { Button } from '$lib/components/common'
+	import { Plug } from 'lucide-svelte'
+
+	interface Props {
+		label?: string
+		onClick: () => void
+		connecting?: boolean
+	}
+
+	let { label = 'Add object from an expression', onClick, connecting = false }: Props = $props()
+</script>
+
+{#if !connecting}
+	<div class="mt-2 mb-2">
+		<Button variant="border" color="light" size="xs" startIcon={{ icon: Plug }} onclick={onClick}>
+			{label}
+		</Button>
+	</div>
+{/if}