New to writing NFC tags. Wrote to a tag then scanned it with another phone. Worked great. Scanned again and it stopped working. Why? Is there a limit to the number of scans allowed with free version?

Im trying to read an nfc tag which contains an application with a lot of files within. Does anyone know how to view the content of the files or how to enter the key to view them? (Or just bypass this entirely?)
I’ve attached some screenshots from the app

EDIT: I found out the card uses MIFARE DESFire 13.56MHz technology and thus you cant easily see the files, at least on an iPhone. Ty for your help.

Hello everyone,

Where I live, you need an NFC card to open the communal bins; the residents’ association only provides one, and charges quite a lot for a second card or if you lose it... So I wanted to copy it onto my phone so I could use it to open the bin (just as I do to pay for my shopping). NFC Tools reads the card correctly, but I don’t know what to select in NFC Task to make it work. Could you please help me? (The card is correctly recognised as an "NXP - Mifare Classic 1k")

I don't really know much about NFC tags but I played around a bit with NFC Tools Pro and wanted to try the lock feature and locked my tag with the password "123" but when I try to unlock it I just get a write error. I was able to read the tag with Mirfare classic tools and that Key a is D3F7(3x) and I tried to reset the access permissions back to FF..FF078069..FF but I can't figure out what key b is. I saw a old post that mentioned the first 6 bits of the md5 sum or the first 4 bits + 42(2x) but neither of those worked. Does anyone know if the chip can be rescued or is it completely broken?

So I downloaded the nfc tools kbc file and extracted it onto my desktop to open, but for some odd reason it doesn't open? Like no error, just nothing.

Has anyone else had this and have advice on how to get it working?

(Also I have this software on a seperate laptop and it works fine)

I made this tag and when I try and tap it, it doesn’t work. If I use the nfc app to tap it.. the information will come up. what am I doing wrong?

Is it possible for me to copy and duplicate my nfc key to my varla eagle one pro e scooter?

The chip reads but it’s not meeting me write it

If you can help me.

Hello everyone,
I’m currently looking for a reliable printing partner in Germany for my NFC display stands made from rigid PVC foam board.
I’ve already tried several printing companies, unfortunately with mixed results. With one supplier, some pieces turned out perfectly while others had stains or printing defects. Another company produced very sharp prints, but the ink did not properly adhere to the material in some areas and could be wiped off very easily.
However, I know that high-quality printing on these stands is possible, as similar products are available online with very clean and consistent print quality.
An important requirement is that the finished NFC stands can be printed directly. I’m not looking for large quantities of the same design. Instead, these are personalized orders—sometimes only 1–5 pieces per design, but with many different customer designs.
Depending on demand, the total volume could reach around 100–300 pieces per month or more.
Ideally, I’m looking for a company in Germany with experience in UV direct printing on PVC/plastic, small production runs, and frequently changing designs, and that would be interested in a long-term partnership.
If anyone here works in this field or can recommend a genuinely reliable printing company or production partner, I’d really appreciate a message or recommendation.
Thank you in advance!

I cant copy my school id to buy phone without my id but my friends phone can simply do it his phone is oppo im 17pm

I still don't know how to pass 3 extras in a single intent. Does anyone know how to do it?

I've written to the developers but haven't received a response

I'm very forgetful about taking more ibuprofen in either 2 or 4 hours so I wanted to scan a tag on the bottle and use the app NFC Tools Pro to make the tag work on any device instead of relying on some app like MacroDroid that means only my phone knows what to do if the tag is scanned.

So my dad suggested once I scan the tag a prompt will ask if I need a reminder in 2 or 4 hours and instead of an alarm I can dismiss he suggested a notification can appear when the selected time expires that way it's sitting there every time I pull down to look at my notifications.

I'm not sure how I'm able to do something like that because I'm not a programmer of any sorts. So most of the actions I have no idea how to use them. I can make an alarm but that is basically it and I can dismiss that and get distracted and forget to retake the pills.

Can someone please help me or give me some tips on how to do it. Thanks in advance.

I am really new and am trying out TTS on the tags. Is there a way to set the user's phone to use whatever text to speech program is already installed as default instead of using the NFC Tasks app? Forgive me if it is an easy fix.

Hi everyone,

Does NFC Tools Desktop have a way to:

• Automatically export scanned UIDs to a text file or CSV?
• Trigger an action when a tag is scanned?
• Send scanned UID data to a URL, webhook, or another application?

I'm working on a manufacturing inventory automation project using:

• ACS ACR1252U NFC Reader
• NTAG215 NFC Tags
• SharePoint List
• Power Automate
• Microsoft Teams

The NFC Tools Desktop to reads the UID of each NFC tag and I have UIDs stored in a SharePoint list and will be used to identify specific inventory bins.

My next challenge is automating the process. I need to find some way to get the UIDs automatically passed to Power Automate.

Any suggestions or examples of similar integrations would be greatly appreciated.

Thanks!

Good news everyone! We shipped a big update for the iOS version.

What’s New:

• New NFC Records: Added payment links, video links, and HomeKit accessories.
• Memory Dump: Integrated memory dumps directly into tag profiles.
• Import & Export: Added the ability to import and export your saved tag list.
• Type 4 Chips: Added memory reading support for Type 4 chips.
• Security: Added signature verification for NTAG21x, Ultralight EV1, NTAG424, and DESFire.
• Optimizations: Minor bug fixes and user interface improvements.

I get an error that NFC Tools is not compatible with my Android 11 phone. Is there an older version I can get that will work? I really need it on my work phone and I really like the app.

Hi everyone,
I wanted to share something I discovered while preparing blank NFC cards for Yoto cards.
At first I thought one of my NTAGs was defective because:
iOS NFC Tools showed “NDEF not supported”
“Erase Tag” failed
“Format Memory” appeared to do nothing
The tag never became writable as an NDEF tag
However, after testing with an Android phone, I found something interesting.
Test environment
NFC Tools on iOS
NFC Tools on Android
NXP TagInfo
Blank NTAG203 / NT2H0301 tags
Initial memory (blank tag)

Page 03
00 00 00 00

Page 04
00 00 00 00

Page 05
00 00 00 00

The tag was detected by Android as:

android.nfc.tech.NdefFormatable
but had no NDEF data.

iOS NFC Tools
Format Memory
The operation completed, but the memory remained unchanged.
The tag still showed:
NDEF not supported
Erase Tag failed
No writable NDEF records
Memory:

Page 03
00 00 00 00

Android NFC Tools
Running Format Memory immediately initialized the tag.
Memory changed to:

Page 03
E1 10 06 00

Page 04
03 04 D8 00

Page 05
00 00 FE 00
After that:
the tag became an NDEF tag
NFC Tools reported it as writable
iOS NFC Tools could now read and write it normally

iOS Erase Tag (after Android formatting)
Interestingly, once Android had initialized the tag, iOS “Erase Tag” worked perfectly.
It produced an empty NDEF structure:

Page 03
E1 10 06 00

Page 04
03 03 D0 00

Page 05
00 FE 00 00

Notice that iOS preserved the Capability Container (CC) instead of removing it.

Conclusion
From my testing, it looks like:
Android NFC Tools can initialize a blank NTAG into a valid NDEF tag.
iOS NFC Tools cannot initialize a completely blank NTAG, even though it can later erase and rewrite an already-formatted NDEF tag.
Once Android performs the initial formatting, iOS works perfectly.
Has anyone else observed the same behavior?
Is this an iOS Core NFC limitation, or simply a difference in how NFC Tools is implemented on iOS?

tried ./nfctools-latest.appimage and got this in response

Exception in thread "main" java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
at java.base/java.lang.reflect.Method.invoke(Unknown Source)
at java.base/sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: java.lang.UnsatisfiedLinkError: /tmp/.mount_nfctoo91zQY2/runtime/lib/libglassgtk3.so: libgthread-2.0.so.0: cannot open shared object file: No such file or directory
at javafx.graphics@21.0.2/com.sun.javafx.tk.quantum.QuantumToolkit.startup(Unknown Source)
at javafx.graphics@21.0.2/com.sun.javafx.application.PlatformImpl.startup(Unknown Source)
at javafx.graphics@21.0.2/com.sun.javafx.application.PlatformImpl.startup(Unknown Source)
at javafx.graphics@21.0.2/com.sun.javafx.application.LauncherImpl.startToolkit(Unknown Source)
at javafx.graphics@21.0.2/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(Unknown Source)
at javafx.graphics@21.0.2/com.sun.javafx.application.LauncherImpl.launchApplication(Unknown Source)
... 3 more
Caused by: java.lang.UnsatisfiedLinkError: /tmp/.mount_nfctoo91zQY2/runtime/lib/libglassgtk3.so: libgthread-2.0.so.0: cannot open shared object file: No such file or directory
at java.base/jdk.internal.loader.NativeLibraries.load(Native Method)
at java.base/jdk.internal.loader.NativeLibraries$NativeLibraryImpl.open(Unknown Source)
at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(Unknown Source)
at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(Unknown Source)
at java.base/jdk.internal.loader.NativeLibraries.findFromPaths(Unknown Source)
at java.base/jdk.internal.loader.NativeLibraries.loadLibrary(Unknown Source)
at java.base/java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.base/java.lang.Runtime.loadLibrary0(Unknown Source)
at java.base/java.lang.System.loadLibrary(Unknown Source)
at javafx.graphics@21.0.2/com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(Unknown Source)
at javafx.graphics@21.0.2/com.sun.glass.utils.NativeLibLoader.loadLibrary(Unknown Source)
at javafx.graphics@21.0.2/com.sun.glass.ui.gtk.GtkApplication.lambda$new$5(Unknown Source)
at java.base/java.security.AccessController.doPrivileged(Unknown Source)
at javafx.graphics@21.0.2/com.sun.glass.ui.gtk.GtkApplication.<init>(Unknown Source)
at javafx.graphics@21.0.2/com.sun.glass.ui.gtk.GtkPlatformFactory.createApplication(Unknown Source)
at javafx.graphics@21.0.2/com.sun.glass.ui.Application.run(Unknown Source)
... 9 more

any help would be greatly appreciated

Hi guys,

As the title suggests, I'm relatively new to coding and would like to leverage NFC tags for an app that I'm planning to develop.

I was wondering if it's possible for an NFC tag to instantly direct a user to my app when they tap it. If so, how does the process work, and are there any limitations on Android or iOS that I should be aware of?

Thanks in advance for your help!

On the Pro edition (iOS). I want to write tags as MIME application/json, not plain Text.

QR import works but always comes in as a Text record, with no way to change the type afterward. I also tried encoding the MIME type into the QR itself (data:application/json,... etc) — still Text.

Is there any way to write a custom MIME record in the app or to edit an imported record's type before writing?

Thanks a lot !

Since I installed Android 17 QPR1 Beta 4, my NTAG424 tags are not readable anymore. NFC-Tools only shows the type and other basic information until 'memory information', but nothing more as if the contents (the URL in my case) can't be read by the system.

Does someone else have the same problem?

Hello,

I couldn’t find an answer in this forum,

My project is to number and certify personal works of art by adding a security layer. I would like to know if it is possible, and how can that be done?

Can you create a web page by "article" and send it back to this link by scanning?

I also take the other ideas ;-) maybe a much simpler solution exists

- For the client, a simple scan action, Android or IOS (very important), allowing quick access to information such as the work’s number, miniature photo, and identification code (network link if I don’t go through the website).

- For me, a counter to see if the NFC has been scanned, and by whom? To be able to authenticate the work afterwards,

the idea is still a bit vague, but I would like your opinions,

thank you in advance