Penguji Regex

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

Apa itu 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

pola + bendera → regexp → Execute agAInst teks uji → kecocokan array

umum polas:

- \d+ → one or more digits

- [a-zA-Z]+ → one or more letters

- ^…$ → anchors for start/end

- (…) → capture groups

Cara Menghitung

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Configure any available options to customize the output.
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Copy or export your results for use in your projects.

Contoh

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

Manfaat Utama

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Save time with real-time calculations as you type.
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Kesalahan Umum yang Harus Dihindari

Not escAPIng special characters (penggunaan \. instead of .)
Forgetting the g flag when expecting multiple kecocokan
Menggunakan quantifier serakah saat yang malas diperlukan
Mempersulit pola — sederhana seringkali lebih baik

Tips Profesional

Test with both cocoking and non-cocoking teks
penggunaan online regex references for complex polas
Mulailah dari yang sederhana dan tambahkan kompleksitas secara bertahap
penggunaan named capture groups for readability

Istilah Kunci Dijelaskan

pola: Search expression
Bendera: Opsi yang mengubah perilaku pencarian
cocok: Found occurrence of pola
Grup tangkap: Bagian pola dalam tanda kurung

Kasus Penggunaan Umum

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

Pertanyaan Umum

What is a ekspresi reguler?

A regex is a sequence of characters defining a search pola. It is penggunaand for pola cocoking in teks, such as finding emAIl addresses, validating masukan, or extracting data from strings.

What regex engine does this penggunaan?

This alat penggunaans JavaScript's built-in regexp engine, which supports most standard regex features including groups, lookaheads, quantifiers, and character classes.

What are umum regex bendera?

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

Why is my regex not cocoking?

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

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