The best alternatives to Gitmoji are Emoji CSS, Emoj, and Markdownify. If these 3 options don't work for you, we've listed a few more alternatives below.
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Emoj is a command-line app to help you find emojis related to some text. Imagine you want an emoji that describes how hungry you are. If you write "i am hungry", it will come back with: 🍴 🍔 😩 🍕 🍟 🍝 😫