regex101 vs RegexBuddy

regex1019.8Visit RegexBuddy7.3Visit

Higher score regex101 #1 in Regular Expression Testers 9.8/10 Free plan · 7-day trial Free plan✓ 4 of 4 features Visit regex101

vs

RegexBuddy #6 in Regular Expression Testers 7.3/10 Paid ✓ 4 of 4 features Visit RegexBuddy

• regex101 fits best

  Teams needing a full-featured regex workbench

• RegexBuddy fits best

  Windows teams needing mature enterprise regex tooling

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Side by side

Feature	regex101 9.8/10 Visit ↗	RegexBuddy 7.3/10 Visit ↗
At a glance
Editor score	9.8	7.3
Ranking	#1 in Regular Expression Testers	#6 in Regular Expression Testers
Best for	Teams needing a full-featured regex workbench	Windows teams needing mature enterprise regex tooling
Pricing model	Free plan + paid	Paid
Starting price	Not published	Not published
Free plan	✓ (best)	—
Free trial	—	—
Deployment	Cloud, Self-hosted	Desktop
Platforms	Web	Windows
Support	Email, Docs	Email, Community
Integrations	2 integrations	4 integrations
Built for	Solo, Small business, Mid-market, Enterprise	Solo, Small business, Mid-market, Enterprise
Features regex101 4/4 · RegexBuddy 4/4
Pattern explanation	✓	✓
Step-through debugger	✓	✓
Code generation	✓	✓
Saved patterns	✓	✓
Specs
Regex flavors	PCRE2 (PHP), JavaScript, Python, Golang, Java, .NET, Rust, POSIX ERE, POSIX BRE, PCRE (Legacy)	94 flavors, including PCRE, PCRE2, .NET, JavaScript, Java, Perl, PHP, Python, Ruby, Boost, RE2, ICU, and POSIX BRE/ERE
Available platforms	Not published	Desktop
Our review
Pros	Supports multiple regex engine flavors and POSIX variants Combines explanations, debugging, code generation, and unit tests Offers saved workspaces, exports, benchmarking, API, and MCP access	Supports 94 regex flavors, including PCRE, .NET, JavaScript, and Python Step-through debugger, regex tree, explanations, and sample-file testing Generates code and supports reusable libraries, GREP, and tool integrations
Cons	Pro features require a paid plan Enterprise deployment and support are reserved for Enterprise The broad feature set may exceed the needs of simple regex checks	Windows desktop only No free plan or free evaluation version License plans are paid tiers based on user quantity
Our verdict	regex101 is a browser-based regular-expression editor for developers and technical users who need more than basic pattern matching. It supports matching, substitution, extraction, unit tests, pattern explanations, code generation,… Read the review →	RegexBuddy is a Windows desktop application for developers and other users who create, test, debug, and maintain regular expressions. Its scope extends beyond pattern matching: users can build expressions with building blocks, read token… Read the review →

Strengths and trade-offs

• regex101 — where it wins

  • Supports multiple regex engine flavors and POSIX variants
  • Combines explanations, debugging, code generation, and unit tests
  • Offers saved workspaces, exports, benchmarking, API, and MCP access

  Where it doesn't

  • Pro features require a paid plan
  • Enterprise deployment and support are reserved for Enterprise
  • The broad feature set may exceed the needs of simple regex checks

• RegexBuddy — where it wins

  • Supports 94 regex flavors, including PCRE, .NET, JavaScript, and Python
  • Step-through debugger, regex tree, explanations, and sample-file testing
  • Generates code and supports reusable libraries, GREP, and tool integrations

  Where it doesn't

  • Windows desktop only
  • No free plan or free evaluation version
  • License plans are paid tiers based on user quantity

• regex1019.8/10 · Free plan · 7-day trial

  A broad regex workbench with debugging, explanations, testing, and code generation.

  Visit regex101Full verdict →
• RegexBuddy7.3/10 · Paid

  A mature Windows regex workbench with deep debugging, conversion, and code-generation tools.

  Visit RegexBuddyFull verdict →