Output Format

The Output format section in the Options view controls exactly how the scanned UID is typed. Every change updates a live preview so you can see the result before scanning a real card.

Format settings

Field	Options	Default
Case	upper, lower	upper
Separator	"" (none), :, -, " " (space)	"" (none)
Byte order	normal, reversed	normal
Prefix	free text	"" (empty)
Trailing key	enter, tab, none	enter

Case

Controls whether hex digits are typed in upper or lower case.

• UPPER — digits A–F are uppercase (e.g. 04A1B2C3)
• lower — digits a–f are lowercase (e.g. 04a1b2c3)

Separator

A string inserted between each byte in the output. The drop-down offers four presets — none, :, -, and a single space — but only these four choices are available.

Byte order

• normal — bytes are output in the order they were read from the card (leftmost byte first).
• reversed — the byte sequence is reversed before formatting. For a 4-byte UID 04 A1 B2 C3, reversed output is C3B2A104.

Prefix

A free-text string prepended to the formatted UID, before any bytes. Leave it empty (the default) for no prefix. Example: entering ID produces ID04A1B2C3.

Trailing key

A key pressed automatically after the UID is typed.

• Enter — sends a Return / Enter keystroke. Submits most forms immediately.
• Tab — sends a Tab keystroke. Moves focus to the next field.
• none — no key is sent after the UID.

The trailing key is shown as a symbol in the live preview: ⏎ for Enter and ⇥ for Tab.

See Typing & Safety for details on arming the toggle before scanning.

Live preview

Below the format settings, a Preview bar shows how the sample UID 04A1B2C3 would be typed with the current settings. The preview updates instantly as you change any field. Use it to confirm your format before scanning a real card.

Examples

The sample UID used throughout is 04 A1 B2 C3 (a 4-byte MIFARE card UID).

Case	Separator	Byte order	Prefix	Trailing key	Result
UPPER	none	normal	—	Enter	04A1B2C3⏎
lower	:	normal	—	none	04:a1:b2:c3
UPPER	-	reversed	—	Tab	C3-B2-A1-04⇥
UPPER	none	normal	UID:	Enter	UID:04A1B2C3⏎

All settings are saved immediately to configuration and apply to the next scan.