Rewrite rules

Rewrite rules let you change requests and responses on the fly before they reach the server or the UI.

What rewrite rules can do

Use rewrite rules to:

• Redirect requests to a different URL.
• Modify request headers, query params, cookies, or body.
• Modify response headers, body, or status code.
• Block requests entirely.

Create a rule

1. Open the Tools tab and tap Rewrite Rules.
2. Tap Add Rule.
3. Choose a Rule Type (redirect, modify, block).
4. Configure the Match criteria (exact, contains, wildcard, or regex).
5. Add one or more Actions.
6. Save and enable the rule.

Matching and priority

• Rules match on the request URL.
• Use priority to control evaluation order.
• Enable Stop processing to prevent later rules from running after a match.
• Use tags to group and filter rules.

Common actions

• Set or remove headers.
• Replace or set the body.
• Redirect to a new URL.
• Add delays.
• Encode/decode body content.
• Adjust status codes and connection behavior.

Advanced tools

The rewrite rules screen provides additional tooling via the toolbar menu:

• Rule Wizard: step-by-step guided rule creation.
• Visual Editor: point-and-click rule builder.
• Rule Testing: test a rule against a sample URL before enabling it.
• Import rules: import rule sets exported from Proxyman, Charles, Fiddler, or HAR files.