Json Validator
Json Validator made simple and private in your browser
Regex Tester
Test your regular expressions with real-time matching, groups, and replace functionality.
Real-time
Flags Support
Capture Groups
Replace
📋 Matches:
No matches yet
✏️ Replace Result:
Click Replace All to see result
⚡ Supports JavaScript regex syntax. Use $1, $2 in replace to reference capture groups.
📖 How to Use Regex Tester
Follow these simple steps to get the best results.
1
Prepare your input
Upload a file, paste text, or enter values required by Regex Tester.
2
Run the tool
Click the action button. All processing runs privately in your browser.
3
Get your result
Download the output file directly from your browser.
❓ Frequently Asked Questions
Everything you need to know about Regex Tester.
Yes — completely free, forever. No sign-up required.
No. All processing happens locally in your browser. We never see or store your files.
No account or registration needed. Just open the tool and use it.
Yes — fully responsive and touch-friendly on phones and tablets.
🔗 Related Tools
You might also find these tools useful.
🔒 Privacy & Trust
We're real people who care deeply about creating tools that truly help. Every feature, every improvement comes from listening to users like you. Your happiness is our success.
This tool was created with one simple goal: to make your day a little easier. We know how frustrating 💻 can be, so we designed this to handle it smoothly while you focus on what matters most. Note: All processing happens in your browser. We never store or see your data.