# Missing 0 in hex output
**URL:** https://discourse.nodered.org/t/missing-0-in-hex-output/52911
**Category:** General
**Created:** [28 October 2021 20:03 UTC](https://discourse.nodered.org/t/missing-0-in-hex-output/52911 "2021-10-28T20:03:40Z")
**Posts on this page:** 4
**Page:** 1
### Author:  [@New2Node](https://discourse.nodered.org/u/New2Node)
#### Post date: [28 October 2021 20:03 UTC](https://discourse.nodered.org/t/missing-0-in-hex-output/52911/1 "2021-10-28T20:03:40Z")
Hi, I’m trying to fill missing “0” charters in a string.
I have a XOR function that outputs an array, when I change this to a string it removes the leading zero which I need.
E.g:
BD 64 5A 44 5F DE 6 BA
I need the output to show 16 characters:
BD 64 5A 44 5F DE 06 BA
How do fill the missing 0 in a string?
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### Author:  [@Colin](https://discourse.nodered.org/u/Colin)
#### Post date: [29 October 2021 06:30 UTC](https://discourse.nodered.org/t/missing-0-in-hex-output/52911/2 "2021-10-29T06:30:37Z")
Show us what the incoming data looks like in a debug node and show us the code you are using to convert it.
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### Author:  [@New2Node](https://discourse.nodered.org/u/New2Node)
#### Post date: [30 October 2021 07:03 UTC](https://discourse.nodered.org/t/missing-0-in-hex-output/52911/3 "2021-10-30T07:03:47Z")
Hi Colin,
I got this working using the buffer-parser node
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### Author:  [@system](https://discourse.nodered.org/u/system)
#### Post date: [13 November 2021 07:03 UTC](https://discourse.nodered.org/t/missing-0-in-hex-output/52911/4 "2021-11-13T07:03:58Z")
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