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Digitally ‑ Digital Products

Sell files, e-books, license keys, promo codes & digital links

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License Key Validator

Validate license keys against common formats or custom patterns. Check format, structure, and get detailed feedback instantly. All processing happens in your browser for complete privacy.

  • Multiple built-in formats
  • Custom regex support
  • Real-time validation
  • 100% private & secure
Enter a regular expression pattern. Use ^ for start and $ for end anchors. Learn more about regex
Your key was normalized to uppercase:

Example Keys (click to try)

4×4 Format: AB12-CD34-EF56-78GH
UUID/GUID: 550e8400-e29b-41d4-a716-446655440000
Prefix Format: AB-12345-67890-ABCDE

How It Works

1

Select Format

Choose from common license key formats or create your own custom regex pattern.

2

Enter Key

Paste or type your license key. The tool validates in real-time as you type.

3

Get Results

Receive instant feedback with detailed error messages if the format doesn't match.

Why Use Our License Key Validator?

Multiple Formats

Validate against common license key formats or create your own custom regex patterns for any key structure.

Real-Time Validation

Get instant feedback as you type with our 300ms debounced validation. See exactly what's wrong and where.

Detailed Error Messages

Understand exactly why a key failed validation. We show which segment has issues and what's expected.

Quick Actions

Copy the normalized key, clear the form, or validate in batch mode. All actions are one click away.

100% Private

All validation happens in your browser. Your license keys are never transmitted or stored anywhere.

Completely Free

No limits, no signup, no hidden fees. Validate as many license keys as you need, whenever you need.

Need to Generate License Keys Too?

Check out our License Key Generator to create secure, formatted license keys with customizable options. Generate up to 100 keys at once.

License Key Generator

Frequently Asked Questions

Yes, this License Key Validator is completely free to use with no signup required. You can validate as many license keys as you need.
Absolutely! All validation happens directly in your browser using JavaScript. Your license keys are never sent to any server, ensuring complete privacy and security.
We support several common formats: XXXX-XXXX-XXXX-XXXX (4 groups of 4 alphanumeric characters), UUID/GUID format (8-4-4-4-12 hexadecimal digits), XX-XXXXX-XXXXX-XXXXX (prefix format), and custom regex patterns you define yourself.
Yes! Select the "Custom Pattern" option and enter your own regular expression (regex) pattern to validate keys against any specific format your system uses.
The tool automatically normalizes your key to uppercase for validation and shows you the normalized version. Most license key systems are case-insensitive, but we clearly indicate when normalization occurs.
No. This tool only checks the format and structure of a license key, not whether it's a valid, genuine, or activated key. Format validation ensures the key matches the expected pattern but doesn't confirm its legitimacy with any licensing system.
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