What is Regex Tester?
Real-time regex tester with match highlighting, capture groups, flags, and replace mode.
Use our Regex Testerto get accurate results instantly. You may also want to explore our JSON Formatter or Base64 Encoder.
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Test regular expressions in real-time. Free online regex tester with match highlighting, capture groups, and replace mode.
Real-time regex tester with match highlighting, capture groups, flags, and replace mode.
Use our Regex Testerto get accurate results instantly. You may also want to explore our JSON Formatter or Base64 Encoder.
Compiles RegExp, tests against input. g flag controls single vs all matches.
Enter your values
Input your regex tester parameters including principal amount, interest rate, and tenure.
Adjust parameters
Use the sliders or numeric inputs to fine-tune your values for accurate results.
View results
Your results update in real-time showing EMI, total interest, and total payment.
Explore details
Check the amortization schedule, charts, and download the PDF report for your records.
Pattern and optional flags for search behavior.
1Enter email pattern
2Enter test string
3Matches highlight
Match: user@example.com
1Enter d{10} pattern
2Enter text with phones
3Both numbers highlighted
2 matches found
Our Regex Tester uses the standard formula adopted by all major Indian banks and financial institutions. The calculation engine processes your inputs in real-time with 99.9% accuracy. All formulas are verified against official bank calculation methods and regulatory guidelines.
Last reviewed: 2026-07-18. We update our calculations whenever regulatory changes occur (tax slabs, interest rates, TDS rules, etc.).
CalcBit Editorial Team
Financial Content Team
The CalcBit Editorial Team comprises financial analysts, tax professionals, and content specialists dedicated to providing accurate, up-to-date financial calculators and educational content for India.
Data Sources
Find answers to common questions about this calculator below.
Enter regex pattern in pattern field, add flags, type test string. Matches highlight in real-time.
g (global), i (case-insensitive), m (multiline), s (dotall), u (unicode), y (sticky).
Parentheses create capture groups. Displayed alongside full match. Named groups (?<name>...) supported.
Replace matches with replacement string. Use $1, $2 for capture groups. Example: (d{10}) -> ***-***-$1