March 9, 2026
Have you ever bought an NFC tag, written the wrong URL, and wondered how to fix it? Or wanted to reuse an old tag for a new contact info but didn’t know where to start? If you’re working with NTAG213, NTAG215, or NTAG216 tags—some of the most popular and reliable NFC tags on the market—rewriting them is easier than you think.
First, let’s clear up the differences between these tags: NTAG213 has 144 bytes (great for small items like keychains or bus card stickers), NTAG215 offers 504 bytes (perfect for anti-metal tags or product traceability), and NTAG216 packs 888 bytes (ideal for storing large data like PDFs or multi-page links). If you need a high-capacity anti-metal NTAG215 tag for industrial or outdoor use, this [NXP NTAG215 Anti Metal NFC Tag](https://www.dorfidtag.com/ntag215-nfc-tags-anti-metal-nfc-tags-NXP-ntag215_2471.html) is a solid choice—it’s durable and compatible with most devices.
Rewriting tags saves you money (no need to buy new tags!) and lets you update information flexibly—like changing a store’s promotion URL or updating a device pairing code. Let’s dive into how to do it.
## What You’ll Need Before You Start
Gather these tools to make rewriting smooth:
– **Rewritable NTAG213/215/216 tags**: NTAG series tags support up to 100,000 rewrites—so you can reuse them for years.
– **For phones**: A device with NFC (check: Settings → Connections → NFC) and recommended apps (iOS: NFC Tools; Android: NFC Writer by wakdev).
– **For computers**: A USB NFC reader (we recommend the ACR122U—it works with Windows and macOS) and software like NFC Reader Tool.
## Rewrite NFC Tags with Your Phone (iOS & Android)
Using your phone is the quickest way to rewrite tags—no extra hardware needed! We’ll break this down for iOS and Android users.
### iOS Steps (Using NFC Tools)
1. Download **NFC Tools** from the App Store. Open the app and allow it to access your phone’s NFC.
2. Tap **Write** at the bottom of the screen. Choose the type of content you want to write—options include text, URL, contact, or calendar. For example, if you’re writing a URL, select **URL/URI**.
3. Enter your content (e.g., “https://yourwebsite.com”) and tap **Done**.
4. Hold the NTAG tag against the NFC area on your iPhone (usually near the camera). Don’t move the tag until the app gives feedback.
5. Wait for the **Writing successful** message. Then tap **Validate** to make sure the content is correct.
*Screenshot tip*: Show the app’s home screen → selecting the content type → entering the URL → tag placement on the iPhone → success notification.
### Android Steps (Using NFC Writer by wakdev)
1. Download **NFC Writer by wakdev** from Google Play. Enable NFC on your phone (find this in Settings → Connections → NFC).
2. Open the app and tap **Create**. Select **Link** if you want to write a URL (or another type for different content).
3. Enter your link, tap **Save**, then go back to the main screen and tap **Write**.
4. Hold the NTAG tag against your phone’s NFC area—locations vary by brand (Huawei’s is in the middle of the back, Xiaomi’s near the camera).
5. You’ll hear a “ding” when it’s done! Scan the tag with the app to verify the content.
*Note*: Some Android phones require enabling “NFC payments” or “Read NFC tags” permissions in settings.
## Rewrite NFC Tags with Your Computer (Using ACR122U + NFC Reader Tool)
If you’re writing multiple tags or large content (like long text), using a computer is better. Here’s how to do it with the ACR122U reader:
1. Plug the ACR122U into a USB port on your computer. Install drivers if needed—Windows may require manual installation, but macOS usually detects it automatically.
2. Download and open **NFC Reader Tool**. Click **Connect** to link the reader to your computer.
3. Place the NTAG tag on the reader’s induction area. The software will show **Tag Detected (NTAG215)** (or your tag’s model).
4. Click **Write** at the top of the screen. Choose the **Data Type** (e.g., “Plain Text”) and enter your content.
5. Click **Start Writing** and wait for the progress bar to finish. You’ll see a **Write Successful** message when it’s done.
6. To make sure everything worked, click **Read**—the software will display the content you just wrote.
*Screenshot tip*: Show the reader connection screen → tag detection message → content input interface → writing progress bar → success notification.
## Pro Tips to Avoid Mistakes
Writing NFC tags is simple—but these tips will make it even smoother:
1. **Check if your tag is rewritable**: Use your phone to scan the tag. If it says “Read-Only”, you can’t rewrite it (most NTAG tags are writable by default).
2. **Stay steady**: Don’t move the phone or computer when it’s near the tag—movement can cause writing failures.
3. **Format content correctly**: Add “https://” to URLs so they open directly in a browser. For contacts, use vCard format (it works with all devices).
4. **Don’t worry about write limits**: NTAG tags support up to 100,000 rewrites—you could write a new URL every day for 274 years before hitting the limit!
## Frequently Asked Questions (FAQ)
Let’s answer the most common questions we get about rewriting NFC tags:
### Q1: Why can’t my phone detect the tag?
A: First, check if NFC is enabled on your phone. Then, make sure the tag is not expired (most tags last 10+ years). Finally, confirm your phone’s NFC location—some phones have it in less obvious spots!
### Q2: Why isn’t the content showing after I write it?
A: Verify the content with the same app you used to write it. If that doesn’t work, check for format errors—like missing “https://” in a URL.
### Q3: Why isn’t my computer reader working?
A: Make sure you installed the correct drivers for your reader (the ACR122U has drivers on the manufacturer’s website). If that’s not it, try a different USB port—some ports don’t supply enough power for the reader.
## Ready to Rewrite Your NFC Tags?
Rewriting NTAG213, NTAG215, or NTAG216 tags is easier than you think—whether you use a phone or computer. With just a few steps, you can reuse old tags, update information, or create new uses for your NFC tags.
And if you need a high-capacity anti-metal NTAG215 tag (perfect for industrial or outdoor use), check out this [NXP NTAG215 Anti Metal NFC Tag](https://www.dorfidtag.com/ntag215-nfc-tags-anti-metal-nfc-tags-NXP-ntag215_2471.html)—it’s durable and works with all NFC devices.
Grab your NTAG tag, pick your method (phone or computer), and start rewriting! The first time might feel a little shaky, but after two tries, you’ll be a pro. Happy writing!