Next.js middleware matcher builder. Build and test middleware config matcher patterns visually with live URL testing and regex preview.
100% browser-based — your data never leaves your device
Build and test Next.js middleware config matcher patterns visually.
export const config = {
matcher: [],
}Visual builder for Next.js App Router routes including groups and parallel routes.
Middleware Matcher BuilderBuild and test Next.js middleware config matcher patterns visually.
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Middleware Matcher Builder is a free online next.js tool that build and test next.js middleware config matcher patterns visually. It works entirely in your browser — no downloads, no installations, and no server uploads required. React developers, full-stack engineers, frontend architects use Middleware Matcher Builder when they need a fast, privacy-respecting way to process next.js data without installing additional software. It supports capabilities such as pattern builder, live testing, regex preview. Additional features include config export. Common use cases include build and test matcher patterns for authentication middleware, exclude static assets and api routes from middleware processing, debug complex matcher configurations with live url testing. All processing happens locally using modern browser APIs, which means your data never leaves your device. This makes Middleware Matcher Builder ideal for working with sensitive data, proprietary code, or any situation where privacy matters.
Middleware Matcher Builder is a free online next.js tool that helps you build and test next.js middleware config matcher patterns visually. Key capabilities include pattern builder, live testing, regex preview. All processing is done locally in your browser — no data is uploaded, stored, or shared with any server. There are no sign-ups, no file size limits, and no hidden charges. It is commonly used to build and test matcher patterns for authentication middleware.
Enter URL paths like /dashboard/* or /api/:path* to define which routes should trigger your middleware.
Use the live testing panel to enter test URLs and see instantly whether they match or are excluded by your matcher configuration.
Check the compiled regular expression to verify your patterns behave as expected before deploying.
Copy the complete matcher configuration object ready to paste into your middleware.ts or next.config file.
| Category | Details |
|---|---|
| Input Limits | Configuration size: Browser memory bound |
| Route depth: Unlimited | |
| Supported Formats | Next.js config, JavaScript, TypeScript, JSON |
| Browser Engine |
|
All operations run entirely in your browser using built-in Next.js APIs. No server uploads, no data storage, and no third-party requests.
Middleware Matcher Builder is ideal when you need to build and test matcher patterns for authentication middleware without installing software or uploading data to a server. Since everything runs in your browser, there is no setup time and no risk of your data being stored on external servers. For one-off tasks and quick processing, Middleware Matcher Builder is faster than setting up a local development environment or using a command-line tool.
No. Middleware Matcher Builder processes everything entirely in your browser using JavaScript. Nothing you type, paste, or upload is ever transmitted to any server. Your data never leaves your device.
The matcher config in next.config.js tells Next.js which paths should trigger your middleware. It uses pattern matching to include or exclude specific routes.
Use negative lookahead patterns or list specific paths to match. The builder lets you visually add and remove paths from the matcher configuration.
Build matcher patterns with visual toggles for paths, params, and conditions.
Test URLs against your matcher patterns and see match/no-match results.
See the compiled regex from your matcher patterns.
Export the complete matcher configuration ready for middleware.ts.
Middleware Matcher Builder is useful in a variety of scenarios across different workflows:
Build and test matcher patterns for authentication middleware
Exclude static assets and API routes from middleware processing
Debug complex matcher configurations with live URL testing
Use patterns like `/((?!api|_next/static|favicon.ico).*)` to exclude common paths from middleware execution.
List more specific paths first in your matcher array so they match faster, improving middleware performance.
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