Howto建立a免費QR程式碼ThatNeverExpires(URL,WiFi,文字More)

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How to Create a Free QR Code That Never Expires

Why QR codes "expire"

A QR code itself never expires — it is just a 2D barcode encoding a string. What expires is the destination URL if you use a redirect service that shuts down, pays-walls, or rate-limits after a trial period. To create a QR code that truly never expires:

Use a static QR code (not a dynamic/redirect one).
Encode a URL you control (your own domain or a stable permalink).
Avoid URL shorteners with expiration policies.

Supported QR code types

URL — Link to a website, landing page, or social profile.
https://example.com
Example: https://freeonlinetoolsgo.com

Wi-Fi — Auto-connect to Wi-Fi network (Android/iOS native support).
WIFI:T:WPA;S:<ssid>;P:<password>;;
Example: WIFI:T:WPA;S:MyNetwork;P:MyPassword;;

Text — Display arbitrary text when scanned.
Any plain text
Example: Hello, World!

Email — Open email client with pre-filled recipient.
mailto:address@example.com
Example: mailto:contact@freeonlinetoolsgo.com

Phone — Initiate a phone call on mobile devices.
tel:+1234567890
Example: tel:+18005551234

SMS — Open SMS app with pre-filled number and message.
smsto:number:message
Example: smsto:+1234567890:Hello

vCard — Share contact information that saves to address book.
BEGIN:VCARD...END:VCARD

Example: BEGIN:VCARD
FN:John Doe
TEL:+1234567890
END:VCARD

Geo — Open maps app at specified coordinates.
geo:lat,lng
Example: geo:37.7749,-122.4194

Wi-Fi QR code format explained

The Wi-Fi QR format WIFI:T:<auth>;S:<ssid>;P:<password>;H:<hidden>; is a de-facto standard recognized by Android and iOS camera apps:

T — Authentication type: WEP, WPA, or nopass
S — Network SSID (escape \;, \,, \", \\)
P — Password (same escaping rules)
H — Hidden network: true or omitted

Best practices

Use error correction level M (15%) for general use, H (30%) for print.
Minimum size: 2×2 cm for screen, 3×3 cm for print at 30 cm distance.
Keep quiet zone (margin) at least 4 modules wide.
Test with multiple scanner apps before deploying.

Related tools

All FreeOnlineTools QR codes are static and generated locally in your browser — they never expire and no data is sent to any server.

如何使用

在上面輸入您的資訊。結果自動更新。使用複製按鈕複製結果。

隱私

所有處理都發生在您的瀏覽器中。您的資料永遠不會上傳到任何伺服器。

常問問題

這個Howto建立a免費QR程式碼ThatNeverExpires(URL,WiFi,文字More)免費嗎？

是的，完全免費。無需註冊。

這個工具會上傳我的資料嗎？

不會。所有處理都在瀏覽器中本機完成。您的資料永遠不會離開您的裝置。

Howto建立a免費QR程式碼ThatNeverExpires(URL,WiFi,文字More)