---
title: "server serialization"
description: "The React Server/Client boundary serializes all object properties into strings and embeds them in the HTML response and subsequent RSC requests. This serialized data directly impacts page weight and load time, so **size matters a lot**. Only pass fields that the client actually uses."
type: skill
canonical_url: https://claudary.paisolsolutions.com/skills/server-serialization
source: "Claudary"
difficulty: intermediate
author: "Claude Code Knowledge Pack"
date: 2026-07-10T11:46:38.647Z
license: CC-BY-4.0
attribution: "server serialization — Claudary (https://claudary.paisolsolutions.com/skills/server-serialization)"
---

# server serialization
The React Server/Client boundary serializes all object properties into strings and embeds them in the HTML response and subsequent RSC requests. This serialized data directly impacts page weight and load time, so **size matters a lot**. Only pass fields that the client actually uses.

## Overview

---
title: Minimize Serialization at RSC Boundaries
impact: HIGH
impactDescription: reduces data transfer size
tags: server, rsc, serialization, props
---

## Minimize Serialization at RSC Boundaries

The React Server/Client boundary serializes all object properties into strings and embeds them in the HTML response and subsequent RSC requests. This serialized data directly impacts page weight and load time, so **size matters a lot**. Only pass fields that the client actually uses.

**Incorrect (serializes all 50 fields):**

```tsx
async function Page() {
  const user = await fetchUser()  // 50 fields
  return <Profile user={user} />
}

'use client'
function Profile({ user }: { user: User }) {
  return <div>{user.name}</div>  // uses 1 field
}
```

**Correct (serializes only 1 field):**

```tsx
async function Page() {
  const user = await fetchUser()
  return <Profile name={user.name} />
}

'use client'
function Profile({ name }: { name: string }) {
  return <div>{name}</div>
}
```

---

Source: [Claudary](https://claudary.paisolsolutions.com/skills/server-serialization) · https://claudary.paisolsolutions.com