# Customizing my template (which app)

**URL:** <https://forum.ghost.org/t/customizing-my-template-which-app/16497>\
**Category:** Themes\
**Created:** [August 14, 2020, 3:32pm UTC](https://forum.ghost.org/t/customizing-my-template-which-app/16497 "2020-08-14T15:32:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![martieda](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/martieda/32/9291_2.png) [@martieda](https://forum.ghost.org/u/martieda)\
**Post date:** [August 14, 2020, 3:32pm UTC](https://forum.ghost.org/t/customizing-my-template-which-app/16497/1 "2020-08-14T15:32:52Z")

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Hello. I just downloaded Casper to make some modifications but when I try to open posts.hbs my Mac doesn’t let me open it because I don’t have any apps that can open that kind of file. Can anyone tell me which app to download so that I can accomplish this? Thanks.

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**Author:** ![vikaspotluri123](https://sea1.discourse-cdn.com/flex015/user_avatar/forum.ghost.org/vikaspotluri123/32/24_2.png) [@vikaspotluri123](https://forum.ghost.org/u/vikaspotluri123)\
**Post date:** [August 14, 2020, 5:43pm UTC](https://forum.ghost.org/t/customizing-my-template-which-app/16497/2 "2020-08-14T17:43:03Z")

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Hey @martieda 👋

This thread has some suggestions for code editors 😄

> [@Which editor for editing themes?](https://forum.ghost.org/t/which-editor-for-editing-themes/15593):
>
> Hi there - newbie here! I’m looking for the simplest code editor to make changes to the .hbs files within a theme? Also, what’s the easiest way for me to ‘re-zip’ a file before re-uploading? Thanks!