Here is a list of CSS fire animations.
Pure CSS candle light animation by One element
Dev: keisuke Takahashi
Fahrenheit 451 – Codepen Challenge Fire
Dev: reaganhenke
Campfire Colony
Dev: Jackie Zen
Log Fire
Dev: Adam Peter Cummings
css animation candle flame
Dev: Maria
Campfire
Dev: Rose Liu
Codevember
Dev: Romina
CSSspark
Dev: Ivan Grozdic
Box-Shadow only, no image pixelart campfire animation
Dev: Jamie Coulter
One div flame
Dev: Chalda Pnuzig
CSS Birthday Cake
Dev: Mark Thomes
CSS Candle Flame Animation
Dev: Mamun Khandaker
Pure CSS birthday cake
Dev: Jaime Caballero
CSS Candle
Dev: Chokcoco
Candle
Dev: Rohini Kumar Reddy S V V
Fire
Dev: Frédéric KOLLER
Only HTML + CSS Fire
Dev: Nishihara
CSS Fire
Dev: anchen
CSS Fire
Dev: RayPan
CSS Fire
Dev: Thomas Wittich
CSS Fire
Dev: Zarko Rvovic
Non-Generative CSS Fire
Dev: Jon Kantner
CSS fire| CSS filter mix
Dev: Chokcoco
Pure CSS fire!
Dev: rafaelcastrocouto
CSS FIRE
Dev: Thom Epps
Only CSS: Fire
Dev: Yusuke Nakaya
SVG CSS Fire animation
Dev: Deepak K Vijayan
Animated Fire Text-Shadow
Dev: Antti Nyman
Simple CSS-only Fire Animation
Dev: Satrio Yamanda
Simple fire animation
Dev: Artyom
CSS Fire
Dev: Zed Dash