Overview
Transform Rules
Rewrite URL

Create a rule in the dashboard
Create a rule via API
URL rewrite examples
Reference

URL rewrite parameters
Available fields and functions

Modify request header

Create a rule in the dashboard
Create a rule via API
Request header modification examples
Reference

Format of header names and values
Available fields and functions
API parameter reference

Modify response header

Create a rule in the dashboard
Create a rule via API
Response header modification examples
Reference

Format of header names and values
Available fields and functions
API parameter reference

Managed Transforms

Configure Managed Transforms
Available Managed Transforms

Work with Transform Rules
Troubleshooting
URL normalization
How it works
Configure in the dashboard
Available settings
Redirects
Single Redirects

Create rule in the dashboard
Create rule via API
Create rule using Terraform
Example rules
Available settings

Bulk Redirects

Concepts
How it works
Create in the dashboard
Create via API
Use cases
Reference

URL redirect parameters
Supported URL components
Available fields and functions
CSV file format
API JSON objects

FAQ
Origin Rules
Create a rule in the dashboard
Create a rule via API
Terraform example
Available settings
API parameter reference
FAQ
Configuration Rules
Create a rule in the dashboard
Create a rule via API
Terraform example
Available settings
Compression Rules
Create a rule in the dashboard
Create a rule via API
Examples
Available settings
Snippets
Create in the dashboard
Custom error responses
Create via API
Parameters
Error tokens
Reference
Edge Side Code deprecation

Troubleshoot Transform Rules

When troubleshooting a rule configuration, review the Transform Rules evaluation section to understand how and when your Transform Rule is evaluated for each request.

For more information on runtime errors related to Transform Rules configuration, refer to Troubleshooting Cloudflare 1XXX errors.