NFC Tools: Tag Reader & Writer

FightTech VN

About this app

NFC Tools reads, writes, copies, erases and locks NFC tags with a clean, modern interface — your tag content never leaves your phone, no ads, no account. Write a WiFi card for your guests, a digital business card, a review link or a URL sticker in seconds.

And when a tag doesn't work, this app is the only one that tells you WHY: a built-in tag compatibility guide explains the MIFARE Classic chipset problem behind most "tag not supported" one-star reviews.

CORE TOOLS ARE FREE

✓ Full tag reader — serial number, technologies, tag type (NFC Forum Type 1–4, NTAG, MIFARE…), used/total capacity, writable and lockable status. Reads from the discovery cache, so it never crashes when the tag leaves the field
✓ Human-readable NDEF parsing — URL, text, WiFi credentials (SSID, security, password), vCard contact, phone, geo, SMS, email, Smart Poster, Android app records; unknown types shown as hex
✓ Write 8 record types — URL, text, WiFi (standard WSC format, 4 security modes), vCard business card, phone, geo location, SMS, email — with field validation
✓ Erase tags (with confirmation) and copy tag → tag, including one source to many targets in a row
✓ Tag compatibility guide — explains why MIFARE Classic fails on many phone chipsets and which tags to buy instead (NTAG213/215/216); auto-detects incompatible tags and opens the explainer when an operation fails
✓ Write history — every write / erase / copy / lock with success status, stored locally
✓ Robust scanning flow — reader-mode based, so the system never steals the tag mid-operation; if the tag slips out of the field, the sheet stays open and simply asks you to hold it close again. No crashes

WHY PEOPLE CHOOSE THIS APP

• It explains failures instead of just failing — compatibility is a first-class screen, not a mystery.
• Modern, uncluttered UI — no 200-item menu maze.
• Your tag content never leaves your phone — no URL, text, WiFi password, contact card or tag serial number is ever sent anywhere. The app does include Firebase crash and anonymous usage reporting (which feature was used and whether it worked), which you can switch off in Settings.
• No account, no ads, and a one-time Pro — never a subscription.

PRO — ONE-TIME PURCHASE

★ Lock tags read-only — with a serious double confirmation (it's irreversible)
★ Saved templates — store any write form as a profile and reload it with a tap
★ Batch write — write the same record to up to 500 tags in one continuous session with a live counter; perfect for small businesses
★ Business template pack — digital business card, guest WiFi card, Google review link

Requires a phone with NFC hardware.

What’s new

v1.2.0

• Verify NTAG 424 DNA (SUN) tags offline with your own AES key — UID, counter and CMAC checked on the phone, and a repeated counter flags a copied link (PRO)
• Tag doctor: scan a tag, get a plain answer — writable, locked, or a chip your phone cannot talk to
• Wi-Fi records: WPA3-Personal and WPA2/WPA3 transition
• iPhone warnings while you compose, before you stick the tag on
• Pause tag reading for 5, 15 or 60 minutes

Your key never leaves the phone.