Quilt Mods for Minecraft 1.20
Browse 15 free Quilt mods for Minecraft 1.20 — popular picks include You Shall Not Spawn!, BactroTweaks, BUBUSTEIN's Vanilla+ Collection.
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You Shall Not Spawn!
A modpack utility mod that allows to disable spawning of any entity.
BactroTweaks
Fullbright, low fire, low shield, no fog, no pumpkin blur and more all in one mod!
BUBUSTEIN's Vanilla+ Collection
Tired of Optifine? This modpack contains only optimization mods, for zoom and for shaders, vanilla tweaks resourcepack, Complementary Shader. This modpack can be used on clients when you are on servers with plugins.
NotCoded's Quality (of life) Tweaks
Adds Quality of life tweaks, bug fixes and performance tweaks, which you can toggle in the config.

Toastilities
Some simple utility mods that I chose to share. :)
48fancy
Convenient Vanilla+ Modpack with tweaks, bugfixes on Quilt.
Sherman's Enhanced Vanilla - Client
A quality of life, Vanilla-compatible modpack that focuses mostly on performance with additional visual, audio, and inventory improvements.
Violet
Vanilla-like optimizations and some client-side quality of life (QoL) features.
Immersive Additions
Immersive additions is a modpack that aims to enhance the Minecraft experience with little tweaks that do not change the gameplay, and can be used on multiplayer servers
Performance Enhancer Next Create Plus - PENC+
PENC+ allows you to enjoy Create with the best performance as possible, with the addition of the best utilities and improvements.
Krabin's Dirt & Soil
An Enhanced Vanilla Experience: Performance, Quality of Life Features, and Aesthetic Upgrades
Colaganium
Colaganium is quality of life and performance modpack. It contains a lot of vanilla Minecraft improvements and tweaks.
Tinkerer's Silk
Opinionated changes for the server or the client - but not both. A mixed-side-less port of tweaks from TInkerer's Quilt.
Practical Vanilla
A modpack with basic changes for optimization and some utilities
Amy's Immersive Vanilla
Amy's take on a modpack that improves vanilla Minecraft with immersive visuals, soundscape, and worldgen while also improving player experience through many quality of life changes and performance optimizations.