Penguji Regex

Alat dalam talian percuma test and debug regular expressions instantly. free online regex tester with real-time matching, flags, substitution, and detailed match information. no sign-up needed.

Apakah Penguji Regex?

A powerful developer tool designed to help you work more efficiently. Regex Tester provides accurate results instantly with a clean, intuitive interface. Perfect for developers, engineers, and IT professionals.

Rumus

corak + bendera → ungkapan biasap → Execute agAInst teks ujian → padanan array

biasa coraks:

- \d+ → one or more digits

- [a-zA-Z]+ → one or more letters

- ^…$ → anchors for start/end

- (…) → capture groups

Cara Mengira

Enter your input in the field above.
Configure any available options to customize the output.
View the results instantly with real-time updates.
Copy or export your results for use in your projects.

Contoh

corak: ^[\w.-]+@[\w.-]+\.\w{2,}$ with teks ujian: "Contact us at hello@contoh.com or support@test.org" padanan both emAIl addresses and displays them in the results list.

Faedah Utama

Get accurate results instantly in your browser.
Save time with real-time calculations as you type.
No data leaves your device - complete privacy.
Free to use on any device, no sign-up required.

Kesilapan Biasa

Not escAPIng special characters (use \. instead of .)
Forgetting the g flag when expecting multiple padanan
Menggunakan pengkuantiti tamak apabila malas diperlukan
Terlalu merumitkan corak — mudah selalunya lebih baik

Tips Pro

Test with both padananing and non-padananing teks
Use dalam talian ungkapan biasa references for complex coraks
Mulakan dengan mudah dan tambah kerumitan secara berperingkat.
Guna named capture groups for readability

Istilah Utama

corak: Search expression
Bendera: Pilihan yang mengubah suai tingkah laku carian
padanan: Found occurrence of corak
Kumpulan tangkapan: Bahagian corak dalam kurungan

Kegunaan Biasa

Validating emAIl addresses, phone numbers, URLs
Extracting coraks from teks (dates, prices, IDs)
Search and replace operations in teks editors
input validation in web forms

Soalan Lazim

What is a ungkapan biasa?

A ungkapan biasa is a sequence of characters defining a search corak. It is used for corak padananing in teks, such as finding emAIl addresses, validating input, or extracting data from rentetans.

What ungkapan biasa engine does this use?

This alat uses JavaScript's built-in ungkapan biasap engine, which supports most standard ungkapan biasa features including groups, lookaheads, quantifiers, and character classes.

What are biasa ungkapan biasa bendera?

g (global): Find all padanan, not just first. i (case-insensitive): Ignore case. m (multiline): ^ and $ padanan line boundaries. s (dotall): . padanan newlines.

Why is my ungkapan biasa not padananing?

biasa issues: missing the g flag for multiple padanan, not escAPIng special characters (., *, +, ?, [, ], (, )), or incorrect quantifier usage.

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