Free regex tester with AI

Regex that
makes sense.

Test patterns instantly. Let AI explain every expression in plain English. No more guessing.

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tinyrex — regex tester
Pattern
/ /
Test string
Matches
Cheat sheet — click to insert
\d
Any digit
\w
Word char
\s
Whitespace
.
Any char
^
Start
$
End
+
One or more
*
Zero or more
?
Optional
()
Group
[]
Char class
{n,m}
Repeat
AI explanation
Why Tinyrex

Everything you need.
Nothing you don't.

⚡
Real-time matching
See matches highlight instantly as you type. No submit button, no waiting.
🤖
AI explanations
Don't know what your regex does? AI breaks it down in plain English, part by part.
📋
Cheat sheet
Click any token to insert it. Never forget syntax again.
💾
Save patterns Pro
Build a library of your most-used patterns. Share with your team.
🔁
Unlimited AI Pro
Free plan includes 3 AI explanations. Pro users get unlimited, forever.
🔗
Share links Pro
Generate a shareable URL with your pattern and test string pre-loaded.
Pricing

Simple pricing.

Start free. Upgrade when you need more.

Free
$0/mo
Everything you need to get started.
  • Real-time regex matching
  • Cheat sheet & syntax help
  • 3 AI explanations / day
  • Match stats & highlights
Start for free
Pro
$7/mo
For developers who use regex every day.
  • Everything in Free
  • Unlimited AI explanations
  • Save & organize patterns
  • Shareable pattern links
  • Team sharing
  • Priority support
Get Pro — $7/mo