Seed Phrase Word Counter
Paste your BIP-39 seed phrase to instantly count its words, confirm it has a valid 12/15/18/21/24-word length, and see its entropy level.
Use the Seed Phrase Word Counter
Your Seed Phrase
Paste your mnemonic below. Nothing leaves your browser.
100% local — your seed phrase never leaves this page.
Paste a seed phrase on the left to see the word count and validation result.
Word Count
0
Entropy & Security
—
Entropy bits
—
Combinations
—
Strength
Words Detected
Copied!
Summary
Paste your BIP-39 seed phrase to instantly count its words, confirm it has a valid 12/15/18/21/24-word length, and see its entropy level.
How it works
- Paste your seed phrase into the input area.
- The tool counts every whitespace-separated word in real time.
- It checks whether the count matches a valid BIP-39 length (12, 15, 18, 21, or 24 words).
- The entropy level (128, 160, 192, 224, or 256 bits) for that length is displayed.
- All processing happens entirely in your browser — no data leaves your device.
Use cases
- Verify you have written down every word of a 12, 15, 18, 21, or 24-word wallet seed.
- Check a recovered phrase before attempting to restore a wallet.
- Confirm the word count when transcribing a hardware wallet backup.
- Quickly audit whether a phrase you received has the correct length.
- Understand the entropy and security level of different seed phrase lengths.
Frequently Asked Questions
Last updated: 2026-09-14 ·
Reviewed by Nham Vu