Use Cloudflare R2 with Payload CMS

This guide demonstrates how to integrate Cloudflare R2 with Payload CMS for efficient media storage. Cloudflare R2 offers an S3-compatible storage solution with significant cost advantages, particularly its zero egress fees policy.

Why Choose R2 with Payload CMS?

Cost Efficiency: Zero egress fees, unlike traditional S3 providers
Global Performance: Leverage Cloudflare's global edge network
Native Integration: Full S3 compatibility with Payload CMS
Simplified Management: Easy-to-use dashboard and API
Predictable Pricing: Pay only for storage used, not for bandwidth

Prerequisites

Cloudflare account with R2 access enabled
Payload CMS project (version 3.x or later)
Node.js 16.x or later
Package manager (npm, yarn, or pnpm)

Implementation Guide

1. Install Required Dependencies

1pnpm add @payloadcms/storage-s3 @aws-sdk/client-s3

2. Configure R2 in Cloudflare

Navigate to Cloudflare Dashboard > R2
Create a new bucket:
- Click "Create bucket"
- Enter a unique bucket name
- Choose your preferred region
Generate API credentials:
- Go to "R2 > Manage R2 API Tokens"
- Click "Create API Token"
- Select permissions:
  - "Object Read" for read-only access
  - "Object Write" for upload capabilities
  - Both for full access
- Save your credentials securely

3. Set Up Environment Variables

Create or update your .env file:

1# .env
2R2_ACCESS_KEY_ID=your_access_key_id
3R2_SECRET_ACCESS_KEY=your_secret_access_key
4R2_BUCKET=your_bucket_name
5R2_ENDPOINT=your-account-id.r2.cloudflarestorage.com

Important: The R2_ENDPOINT should be just the domain without the https:// protocol. The protocol will be added in the configuration code.

4. Configure Payload CMS

Update your payload.config.ts:

1import { buildConfig } from "payload/config";
2import { s3Storage } from "@payloadcms/storage-s3";
3import path from "path";
4
5const storage = s3Storage({
6  collections: {
7    media: {
8      disableLocalStorage: true, // Recommended for production
9      prefix: "media", // Optional prefix for uploaded files
10      generateFileURL: ({ filename, prefix }) =>
11        `https://${process.env.R2_BUCKET}.${process.env.R2_ENDPOINT}/${prefix}/${filename}`,
12    },
13  },
14  bucket: process.env.R2_BUCKET || "",
15  config: {
16    endpoint: `https://${process.env.R2_ENDPOINT}` || "", // Protocol is required here
17    credentials: {
18      accessKeyId: process.env.R2_ACCESS_KEY_ID || "",
19      secretAccessKey: process.env.R2_SECRET_ACCESS_KEY || "",
20    },
21    region: "auto", // Required for R2
22    forcePathStyle: true, // Required for R2
23  },
24});
25
26export default buildConfig({
27  admin: {
28    // Your admin config
29  },
30  collections: [
31    {
32      slug: "media",
33      upload: {
34        staticDir: path.resolve(__dirname, "../media"),
35        // Image sizes are processed locally before upload
36        imageSizes: [
37          {
38            name: "thumbnail",
39            width: 400,
40            height: 300,
41            position: "centre",
42          },
43          {
44            name: "card",
45            width: 768,
46            height: 1024,
47            position: "centre",
48          },
49        ],
50        formatOptions: {
51          format: "webp", // Convert uploads to WebP
52          options: {
53            quality: 80,
54          },
55        },
56      },
57      fields: [], // Add custom fields as needed
58    },
59  ],
60  plugins: [storage],
61});

Critical: Note that the endpoint in the config requires the https:// protocol prefix. The environment variable contains only the domain, and we add the protocol in the configuration. This is essential for the S3 client to work properly.

5. Public Access Configuration

To make your R2 bucket publicly accessible, you have two options:

Using Cloudflare Workers (Recommended):

1// worker.js
2export default {
3  async fetch(request, env) {
4    const url = new URL(request.url);
5    const objectKey = url.pathname.slice(1); // Remove leading slash
6
7    try {
8      const object = await env.MY_BUCKET.get(objectKey);
9
10      if (!object) {
11        return new Response("Object Not Found", { status: 404 });
12      }
13
14      const headers = new Headers();
15      object.writeHttpMetadata(headers);
16      headers.set("etag", object.httpEtag);
17
18      return new Response(object.body, {
19        headers,
20      });
21    } catch (error) {
22      return new Response("Internal Error", { status: 500 });
23    }
24  },
25};

Using Public Bucket (Simpler but less control):
- Enable public access in R2 bucket settings
- Update your generateFileURL config to use the public bucket URL

Advanced Configuration

Custom Upload Handlers

1s3Storage({
2  // ...other config
3  beforeUpload: async ({ req, file }) => {
4    // Customize file before upload
5    return file;
6  },
7  afterUpload: async ({ req, file, collection }) => {
8    // Perform actions after successful upload
9    console.log(`File ${file.filename} uploaded to ${collection.slug}`);
10  },
11});

Error Handling

Implement robust error handling:

1try {
2  await payload.create({
3    collection: "media",
4    data: {
5      // your upload data
6    },
7  });
8} catch (error) {
9  if (error.code === "AccessDenied") {
10    console.error("R2 access denied - check credentials");
11  } else if (error.code === "NoSuchBucket") {
12    console.error("R2 bucket not found");
13  } else {
14    console.error("Upload failed:", error);
15  }
16}

Troubleshooting Guide

Common Issues

Invalid URL Error

If you encounter TypeError: Invalid URL errors:

Ensure the endpoint in your config includes the https:// protocol
The environment variable should contain ONLY the domain (e.g., account-id.r2.cloudflarestorage.com)
The protocol is added in the configuration: endpoint: `https://${process.env.R2_ENDPOINT}`

Connection Errors

Verify R2 credentials are correct
Confirm endpoint URL format matches the pattern above
Check network connectivity
Validate IP allowlist settings

Upload Failures

Verify bucket exists and is accessible
Check API token permissions (needs both Read & Write)
Confirm file size limits
Validate MIME type restrictions

URL Generation Issues

Verify public bucket configuration
Check custom domain settings
Validate URL formatting

Health Check

Run this diagnostic code to verify your setup:

1async function checkR2Setup() {
2  try {
3    const testUpload = await payload.create({
4      collection: "media",
5      data: {
6        // test file data
7      },
8    });
9    console.log("R2 connection successful:", testUpload);
10  } catch (error) {
11    console.error("R2 setup check failed:", error);
12  }
13}

Performance Optimization

File Compression

Implement image compression before upload
Use appropriate file formats
Set reasonable size limits

Caching Strategy

Configure browser caching headers
Implement cache-control policies
Use Cloudflare's caching features

Security Best Practices

Access Control

Use least-privilege access tokens
Implement bucket policies
Enable audit logging

Data Protection

Enable encryption at rest
Implement secure file validation
Regular security audits

Resources

Payload CMS Documentation
Cloudflare R2 Documentation
S3 Plugin Documentation
Cloudflare Workers Documentation

Support

For additional help:

Join the Payload CMS Discord
Visit the Cloudflare Community Forums
Submit issues on GitHub

Bridger Tower / Designer and Software Engineer