regex101: Next.js middleware config matcher regex

Pro

^start of line

*repeats the group contents below any number of times:

1st Alternative^\/api\/auth\/

^start of line

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

apithe literal text api (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

auththe literal text auth (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

2nd Alternative\/(favicon|icon|apple-icon)\.(ico|jpg|jpeg|png|svg)$

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 2(favicon|icon|apple-icon)

1st Alternativefavicon

faviconthe literal text favicon (case sensitive)

2nd Alternativeicon

iconthe literal text icon (case sensitive)

3rd Alternativeapple-icon

apple-iconthe literal text apple-icon (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

Group 3(ico|jpg|jpeg|png|svg)

1st Alternativeico

icothe literal text ico (case sensitive)

2nd Alternativejpg

jpgthe literal text jpg (case sensitive)

3rd Alternativejpeg

jpegthe literal text jpeg (case sensitive)

4th Alternativepng

pngthe literal text png (case sensitive)

5th Alternativesvg

svgthe literal text svg (case sensitive)

$end of line

3rd Alternative^\/(assets|public)\/

^start of line

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

Group 4(assets|public)

1st Alternativeassets

assetsthe literal text assets (case sensitive)

2nd Alternativepublic

publicthe literal text public (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

.any character (except for line terminators)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

26 tokens

Regular Expression

^((?!^\/api\/auth\/|\/(favicon|icon|apple-icon)\.(ico|jpg|jpeg|png|svg)$|^\/(assets|public)\/).)*$

New

## Next.js middleware config matcher regex
# ~ https://nextjs.org/docs/app/building-your-application/routing/middleware#matcher
# ~ https://nextjs.org/docs/app/api-reference/file-conventions/middleware#config-object-optional

# Public - skip middleware
/api/auth/*
/favicon.ico
/assets/*
/public/*

# Private - use middleware
/*
/api/*