Are the tools on 30tools really free?

Yes, all tools on 30tools are completely free to use. No registration, subscription, or payment required. No watermarks are added to your processed files.

Do I need to create an account to use the tools?

No account creation is required. All tools work directly in your browser without any sign-up process. Simply visit the tool page and start using it immediately.

Are my files safe when using 30tools?

Yes, your privacy is our priority. Most tools process files directly in your browser without uploading to our servers. Your files never leave your device, ensuring complete privacy and security.

What types of tools are available on 30tools?

We offer 135+ tools across multiple categories: image processing (compression, conversion, editing), video tools (compression, conversion, trimming), PDF tools (merge, split, compress), text tools (word counter, case converter), developer tools (JSON formatter, Base64 encoder), SEO tools, and many more utilities.

Can I use 30tools on mobile devices?

Absolutely! All our tools are fully responsive and work perfectly on smartphones and tablets. The interface adapts to your screen size for optimal usability on any device.

Is there a file size limit for uploads?

File size limits vary by tool type: images up to 50MB, PDFs up to 100MB, videos up to 500MB. These limits accommodate most common use cases while ensuring optimal performance.

Can I process multiple files at once?

Yes! Many of our tools support batch processing. You can upload and process multiple files simultaneously, saving time and increasing productivity.

Do the tools work offline?

Many tools work offline once the page is loaded since processing happens in your browser. However, some features may require an internet connection for optimal functionality.

What is a regular expression (regex)?

Regular expressions are patterns used to match character combinations in strings. They're powerful tools for text processing, validation, and data extraction.

Which regex flavor does the tool support?

Our tool primarily supports JavaScript regex flavor. We also provide options for Python and PHP flavors, with notation differences clearly marked.

Can I test regex patterns with multiple test cases?

Yes! Add multiple test strings to see how your pattern matches different inputs. This helps ensure your regex works correctly across various scenarios.

How do I debug a regex that's not working?

Use our step-by-step explanation feature, check for escaped characters, verify pattern syntax, and test with simpler patterns first to isolate issues.

What are capture groups and how do I use them?

Capture groups (parentheses) extract specific parts of matches. Our tool displays all capture groups, making it easy to see what each group captures.

Can I save and share my regex patterns?

Currently, patterns aren't saved automatically. We recommend bookmarking URLs with your patterns or copying them to your notes for future use.

How do I match special characters like dots or brackets?

Escape special characters with backslashes: \. for literal dots, \[ \] for brackets, \\ for backslashes. Our tool highlights these syntax elements.

What's the difference between greedy and non-greedy matching?

Greedy quantifiers (* + {}) match as much as possible. Non-greedy (*? +? {}?) match as little as possible. Test both to see the difference.

Are these developer tools really free to use?

Yes! All our developer tools are completely free with no hidden charges, registration requirements, or usage limits. We believe in providing accessible tools for developers worldwide.

Do I need to upload my code or data to your servers?

No! All our developer tools process data client-side in your browser. Your code, API keys, and sensitive data never leave your device, ensuring complete privacy and security.

Can I use these tools for commercial projects?

Absolutely! Our developer tools are free for both personal and commercial use. There are no licensing restrictions on using these tools in your professional development work.

Do the tools work offline?

Yes! Once the page loads, most developer tools work offline since all processing happens in your browser. No internet connection is required for core functionality.

Are these tools suitable for production environments?

Our tools are perfect for development, testing, and debugging. For production environments, we recommend using appropriate libraries and frameworks in your codebase.

How do I report bugs or request new features?

We welcome feedback! Use our contact form or GitHub repository to report issues or suggest new developer tools. We actively respond to community feedback.

Free Regex Tester & Pattern Validator Online - Test Regular Expressions

Test & validate regular expressions with real-time matching. Supports JavaScript, Python, PHP regex flavors. Pattern explanation, match highlighting, capture groups, and test case management. Perfect for developers and data validation.

Regex Tester

Test and debug regular expressions with real-time matching and explanations

Real-time TestingCommon PatternsCode GenerationMatch Highlighting

Regular Expression Pattern

Enter your regex pattern to test against the input text

Test String

Enter text to test your regex pattern against

Common Patterns

Click to load pre-built regex patterns

Real-time Testing

Test your regex patterns instantly as you type. See matches highlighted in real-time.

Pattern Library

Access common regex patterns for emails, URLs, phone numbers, and more.

Code Export

Generate ready-to-use code snippets in JavaScript, Python, and PHP.

Love this tool? Share it!

Help others discover this amazing free tool ✨

Free forever • No sign-up required

Why Choose Our Regex Tester?

Real-time pattern matching

Multiple regex flavors

Match highlighting

Pattern explanation

Test case management

Capture group display

Syntax error detection

Performance metrics

Usage Examples

Email Validation

Validate email addresses with regex pattern

Input:

[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}

Output:

Matches: user@example.com, test.email+tag@domain.co.uk

What Developers Say About Our Regex Tester

4.8

Based on 201+ reviews

Join thousands of satisfied users who trust our tools for their daily tasks

Alex Johnson

Verified

5.0

Jan 20, 2024

Amazing collection of tools

30tools has become my go-to for all online utilities. Every tool I've used works perfectly and the fact that it's all free is incredible. No ads, no watermarks!

via ProductHunt

Maria Garcia

Verified

4.5

Jan 19, 2024

Reliable and fast

Been using these tools for months now. They're consistently reliable and much faster than similar tools I've tried. The privacy-first approach is a huge plus.

via Capterra

James Wilson

Verified

5.0

Jan 17, 2024

Professional quality tools

As a freelancer, I need tools that work reliably without breaking the bank. 30tools delivers professional-grade utilities completely free. Highly recommended!

via Trustpilot

Regex Tester FAQ

Everything you need to know about regular expression testing & validation

More Developer Tools

JSON Formatter

Format and validate JSON data

developer-tools

API Tester

Test REST APIs with custom headers

developer-tools

URL Encoder

Encode and decode URLs

developer-tools

User Comments & Reviews4

4.8/5 avg rating

4 helpful reviews

Sort by:

Filter:

Showing 4 of 4 comments

Alex ChenVerifiedHelpful655d ago

★★★★★Rated this tool

This image compressor is amazing! Reduced my website images by 70% without any noticeable quality loss. The batch processing feature is a game-changer.

Sarah JohnsonHelpful655d ago

★★★★★Rated this tool

Perfect tool for my blog! The interface is super clean and intuitive. Love that it works directly in the browser without uploading files to servers.

Mike RodriguezVerifiedHelpful657d ago

★★★★★Rated this tool

Great compression quality! Used it for optimizing images for my e-commerce store. Would love to see more format options in the future.

Emma ThompsonHelpful657d ago

★★★★★Rated this tool

Fast and reliable! Processed 50+ images in under a minute. The quality settings give good control over the compression ratio.

Free Regex Tester & Pattern Validator Online - Test Regular Expressions

Regex Tester

Test and debug regular expressions with real-time matching and explanations

Real-time TestingCommon PatternsCode GenerationMatch Highlighting

Regular Expression Pattern

Enter your regex pattern to test against the input text

Test String

Enter text to test your regex pattern against

Common Patterns

Click to load pre-built regex patterns

Real-time Testing

Test your regex patterns instantly as you type. See matches highlighted in real-time.

Pattern Library

Access common regex patterns for emails, URLs, phone numbers, and more.

Code Export

Generate ready-to-use code snippets in JavaScript, Python, and PHP.

Love this tool? Share it!

Help others discover this amazing free tool ✨

Free forever • No sign-up required

Why Choose Our Regex Tester?

Real-time pattern matching

Multiple regex flavors

Match highlighting

Pattern explanation

Test case management

Capture group display

Syntax error detection

Performance metrics

Usage Examples

Email Validation

Validate email addresses with regex pattern

Input:

[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}

Output:

Matches: user@example.com, test.email+tag@domain.co.uk

What Developers Say About Our Regex Tester

4.8

Based on 201+ reviews

Join thousands of satisfied users who trust our tools for their daily tasks

Alex Johnson

Verified

5.0

Jan 20, 2024

Amazing collection of tools

30tools has become my go-to for all online utilities. Every tool I've used works perfectly and the fact that it's all free is incredible. No ads, no watermarks!

via ProductHunt

Maria Garcia

Verified

4.5

Jan 19, 2024

Reliable and fast

Been using these tools for months now. They're consistently reliable and much faster than similar tools I've tried. The privacy-first approach is a huge plus.

via Capterra

James Wilson

Verified

5.0

Jan 17, 2024

Professional quality tools

As a freelancer, I need tools that work reliably without breaking the bank. 30tools delivers professional-grade utilities completely free. Highly recommended!

via Trustpilot

Regex Tester FAQ

Everything you need to know about regular expression testing & validation

More Developer Tools

JSON Formatter

Format and validate JSON data

developer-tools

API Tester

Test REST APIs with custom headers

developer-tools

URL Encoder

Encode and decode URLs

developer-tools

User Comments & Reviews4

4.8/5 avg rating

4 helpful reviews

Sort by:

Filter:

Showing 4 of 4 comments

Alex ChenVerifiedHelpful655d ago

★★★★★Rated this tool

This image compressor is amazing! Reduced my website images by 70% without any noticeable quality loss. The batch processing feature is a game-changer.

Sarah JohnsonHelpful655d ago

★★★★★Rated this tool

Perfect tool for my blog! The interface is super clean and intuitive. Love that it works directly in the browser without uploading files to servers.

Mike RodriguezVerifiedHelpful657d ago

★★★★★Rated this tool

Great compression quality! Used it for optimizing images for my e-commerce store. Would love to see more format options in the future.

Emma ThompsonHelpful657d ago

★★★★★Rated this tool

Fast and reliable! Processed 50+ images in under a minute. The quality settings give good control over the compression ratio.