Coding texts (Each letter is coded with unicode character)

You can copy paste the text as a text

Up-Down coder/decoder ↺	Left-Right coder/decoder ⇄
Better for paragraph texts and numbers	Better for titles or one line text

Coding texts as images

You can use any image editor (in this example Paint) - 180° rotation for Up-Down coding - horizontal symetry for Left-Right coding
Up-Down coding ↺ ƃuıpoɔ uʍoᗡ-d∩	Left-Right coding ⇄ ϱniboɔ ƚhϱiЯ-ƚᎸɘ⅃

up↺uʍop     ƚᎸɘl ⇄right