NDEF Message Encoder
Client-SideCreate NDEF messages for NFC tags. Build URI, Text, vCard, Wi-Fi, and Smart Poster records with proper formatting and hex output for tag programming.
Mentioned in Guides
- How to Read and Write NFC Tags
- NFC for Beginners: Your First Project
- Android NFC Programming Guide
- iOS Core NFC Programming Guide
- Web NFC API Guide
- NFC for Smart Home Automation
- NFC in Retail
- NFC for Wine and Spirits Authentication
- NDEF Specification Deep Dive
- NFC Tag Not Detected: Diagnosis Guide
- NFC Write Failures and Recovery
- NFC Testing Methodology
- NFC Tag Encoding Best Practices
- NFC with Tasker for Android
- NFC Digital Business Cards
Frequently Asked Questions
Yes, all tools on NFCFYI are completely free with no account required. Tools run entirely in your browser (client-side JavaScript) and do not send your data to any server, ensuring privacy for sensitive information like encryption keys or NDEF records.
All tools are fully responsive and work on smartphones, tablets, and desktop browsers. Tools that interact with NFC hardware (like tag reading/writing) require a device with NFC support and a compatible browser (Chrome on Android for Web NFC API). Calculation and encoding tools work on any device.
Yes. NDEF records, memory calculations, and encoding outputs generated by our tools can be used freely in both personal and commercial projects. The tools are reference implementations and we recommend verifying critical outputs against the relevant NFC Forum or ISO specifications.