Is locking an NFC tag permanent?

Yes, permanently and irreversibly. Web NFC burns the hardware OTP (one-time programmable) lock bits on the tag chip. No app or tool can undo this.

Can people still read a locked NFC tag?

Yes! Read access is completely unaffected. Phones and NFC readers can continue scanning the tag indefinitely, but the data can never be modified.

Standard NFC Forum Type 2 tags such as NTAG213, NTAG215, and NTAG216.

Make your NFC tag permanently read-only to safeguard public links, payment tags, or smart posters against accidental changes or tampering.

FreePermanent Read-OnlyHardware Locked⚡ Chrome for Android only

Browser requirement: Web NFC works only in Chrome on Android (v89+). Enable NFC in your phone's settings before scanning.

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Warning: Locking an NFC tag is permanent and irreversible. Once locked, no user or software can edit, update, or erase the tag ever again.

Lock console ready. Click Lock NFC Tag to proceed...

Loading locker…

Carefully follow these steps — locking cannot be undone.

Read your tag with the NFC Reader to be 100% certain the data (URL, vCard) is completely correct.

Confirm the warning prompt and hold the tag steady against the back of your phone.

Hardware lock bits are burned. The tag is now read-only for lifetime and cannot be overwritten.

⚠️ IRREVERSIBLE ACTIONLocking sets the tag OTP (one-time programmable) lock bits. It cannot be unlocked by any software or device.

🏢 Best For Public TagsIdeal for tags placed in public areas, exhibition posters, storefront menus, or marketing displays.

💳 Payment & Contact TagsPrevents malicious actors from reprogramming your desk business card or donation payment tag.

🏷️ Tag SupportSupports standard NTAG213, NTAG215, and NTAG216 tags via `NDEFReader.makeReadOnly()`.