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Quilted Fabric API (QFAPI) / Quilt Standard Libraries (QSL)

The standard libraries of the Quilt ecosystem. Essential for your modding experience on Quilt!
by QuiltMC
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Updated Jun 30, 2026
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Quilted Fabric API (QFAPI) and Quilt Standard Libraries (QSL)


Essential standard libraries for the Quilt ecosystem. QSL gives modders Quilt-exclusive tools to add new and exciting features to their mods, while Quilted Fabric API provides compatibility with Fabric mods that use the Fabric API.

This project requires Quilt Loader!

The Quilt Project


The Quilt project is an open-source, community-driven modding toolchain designed primarily for Minecraft. By focusing on speed, ease of use and modularity, Quilt aims to provide a sleek and modern modding toolchain with an open ecosystem.

Learn more about Quilt on our website.

Notes


Quilt is currently still in development, and in beta.
This means issues may arise but we will do our best to fix them as fast as we can. Quilted Fabric API does not support the "implementation details" of most of Fabric API.

Mods that use implementation details may work on Fabric, but will not work on Quilt.

[1.20.1] QFAPI 7.7.0 and QSL 6.3.0
MC 1.20.1, Quilt
Release 2024-12-02 Get
[1.21] QFAPI 11.0.0-alpha.3 and QSL 10.0.0-alpha.1
MC 1.21, Quilt
Beta 2024-08-12 Get
[1.21] QFAPI 11.0.0-alpha.3 and QSL 10.0.0-alpha.1
MC 1.21, Quilt
Beta 2024-07-14 Get
[1.20.1] QFAPI 7.6.0 and QSL 6.2.0
MC 1.20.1, Quilt
Release 2024-07-10 Get
[1.20.6] QFAPI 10.0.0-alpha.3 and QSL 9.0.0-alpha.1
MC 1.20.6, Quilt
Beta 2024-07-08 Get
[1.21] QFAPI 11.0.0-alpha.2 and QSL 10.0.0-alpha.1
MC 1.21, Quilt
Beta 2024-07-08 Get
[1.21] QFAPI 11.0.0-alpha.1 and QSL 10.0.0-alpha.1
MC 1.21, Quilt
Beta 2024-07-04 Get
[1.20.6] QFAPI 10.0.0-alpha.2 and QSL 9.0.0-alpha.1
MC 1.20.6, Quilt
Beta 2024-07-03 Get
[1.20.1] QFAPI 7.5.0 and QSL 6.1.2
MC 1.20.1, Quilt
Release 2024-06-12 Get
[1.19.3] QFAPI 5.0.0-alpha.7 and QSL 4.0.0-beta.3
MC 1.19.3, Quilt
Beta 2022-12-24 Get
[1.19.3] QFAPI 5.0.0-alpha.6 and QSL 4.0.0-beta.2
MC 1.19.3, Quilt
Beta 2022-12-19 Get
[1.19.3] QFAPI 5.0.0-alpha.5 and QSL 4.0.0-beta.2
MC 1.19.3, Quilt
Beta 2022-12-10 Get
[1.19.3] QFAPI 5.0.0-alpha.4 and QSL 4.0.0-beta.2
MC 1.19.3, Quilt
Beta 2022-12-09 Get
[1.19.2] QFAPI 4.0.0-beta.24 and QSL 3.0.0-beta.24
MC 1.19.2, Quilt
Beta 2022-12-08 Get
[1.19.3] QFAPI 5.0.0-alpha.3 and QSL 4.0.0-beta.1
MC 1.19.3, Quilt
Beta 2022-12-08 Get
[1.19.3-rc1] QFAPI 5.0.0-beta.2 and QSL 4.0.0-alpha.6
MC 1.19.3, Quilt
Beta 2022-12-04 Get
[1.19.3-rc1] QFAPI 5.0.0-alpha.2 and QSL 4.0.0-alpha.6
MC 1.19.3, Quilt
Beta 2022-12-04 Get
[1.19.2] QFAPI 4.0.0-beta.23 and QSL 3.0.0-beta.22
MC 1.19.2, Quilt
Beta 2022-11-30 Get
[1.19.2] QFAPI 4.0.0-beta.22 and QSL 3.0.0-beta.22
MC 1.19.2, Quilt
Beta 2022-11-28 Get
[1.19.2] QFAPI 4.0.0-beta.21 and QSL 3.0.0-beta.21
MC 1.19.2, Quilt
Beta 2022-11-23 Get
[1.18.2] QFAPI 1.0.0-beta.28 and QSL 1.1.0-beta.26
MC 1.18.2, Quilt
Beta 2022-11-21 Get
[1.19.2] QFAPI 4.0.0-beta.20 and QSL 3.0.0-beta.21
MC 1.19.2, Quilt
Beta 2022-11-15 Get
[1.18.2] QFAPI 1.0.0-beta.27 and QSL 1.1.0-beta.26
MC 1.18.2, Quilt
Beta 2022-11-15 Get
[22w43a] QFAPI 5.0.0-alpha.1 and QSL 4.0.0-alpha.3
MC 1.19.3, Quilt
Beta 2022-11-05 Get
[1.19.2] QFAPI 4.0.0-beta.18 and QSL 3.0.0-beta.20
MC 1.19.2, Quilt
Beta 2022-10-31 Get
[1.19.2] QFAPI 4.0.0-beta.19 and QSL 3.0.0-beta.20
MC 1.19.2, Quilt
Beta 2022-10-31 Get
[1.18.2] QFAPI 1.0.0-beta.26 and QSL 1.1.0-beta.26
MC 1.18.2, Quilt
Beta 2022-10-23 Get
[1.19.2] QFAPI 4.0.0-beta.17 and QSL 3.0.0-beta.19
MC 1.19.2, Quilt
Beta 2022-10-23 Get
[1.19.2] QFAPI 4.0.0-beta.16 and QSL 3.0.0-beta.18
MC 1.19.2, Quilt
Beta 2022-10-19 Get
[1.19.2] QFAPI 4.0.0-beta.15 and QSL 3.0.0-beta.18
MC 1.19.2, Quilt
Beta 2022-10-16 Get
[1.19.2] QFAPI 4.0.0-beta.14 and QSL 3.0.0-beta.18
MC 1.19.2, Quilt
Beta 2022-10-15 Get
[1.18.2] QFAPI 1.0.0-beta.25 and QSL 1.1.0-beta.26
MC 1.18.2, Quilt
Beta 2022-09-26 Get
[1.19.2] QFAPI 4.0.0-beta.13 and QSL 3.0.0-beta.16
MC 1.19.2, Quilt
Beta 2022-09-26 Get
[1.19.2] QFAPI 4.0.0-beta.12 and QSL 3.0.0-beta.16
MC 1.19.2, Quilt
Beta 2022-09-14 Get
[1.19.2] QFAPI 4.0.0-beta.11 and QSL 3.0.0-beta.15
MC 1.19.2, Quilt
Beta 2022-09-05 Get
[1.19.2] QFAPI 4.0.0-beta.10 and QSL 3.0.0-beta.15
MC 1.19.2, Quilt
Beta 2022-08-30 Get
[1.19.2] QFAPI 4.0.0-beta.9 and QSL 3.0.0-beta.14
MC 1.19.2, Quilt
Beta 2022-08-16 Get
[1.19.2] QFAPI 4.0.0-beta.8 and QSL 3.0.0-beta.13
MC 1.19.2, Quilt
Beta 2022-08-14 Get
[1.18.2] QFAPI 1.0.0-beta.23 and QSL 1.1.0-beta.25
MC 1.18.2, Quilt
Beta 2022-08-13 Get
[1.18.2] QFAPI 1.0.0-beta.24 and QSL 1.1.0-beta.26
MC 1.18.2, Quilt
Beta 2022-08-13 Get
[1.19.2] QFAPI 4.0.0-beta.7 and QSL 3.0.0-beta.10
MC 1.19.2, Quilt
Beta 2022-08-07 Get
[1.19.1] QFAPI 4.0.0-beta.5 and QSL 3.0.0-beta.9
MC 1.19.1, Quilt
Beta 2022-08-05 Get
[1.19.1] QFAPI 4.0.0-beta.6 and QSL 3.0.0-beta.10
MC 1.19.2, 1.19.1, Quilt
Beta 2022-08-05 Get
[1.19.1] QFAPI 4.0.0-beta.3 and QSL 3.0.0-beta.5
MC 1.19.1, Quilt
Beta 2022-08-04 Get
[1.19.1] QFAPI 4.0.0-beta.4 and QSL 3.0.0-beta.7
MC 1.19.1, Quilt
Beta 2022-08-04 Get
[1.19.1] QFAPI 4.0.0-beta.2 and QSL 3.0.0-beta.3
MC 1.19.1, Quilt
Beta 2022-08-01 Get
[1.19.1] QFAPI 4.0.0-beta.1 and QSL 3.0.0-beta.2
MC 1.19.1, Quilt
Beta 2022-07-27 Get
[1.19.1-rc2] QFAPI 3.0.0-alpha.6 and QSL 2.1.0-alpha.4
MC 1.19-Snapshot, Quilt
Beta 2022-07-24 Get
[1.19] QFAPI 2.0.0-beta.8 and QSL 2.0.0-beta.16
MC Quilt, 1.19
Beta 2022-07-21 Get
[1.19.1-rc2] QFAPI 3.0.0-alpha.5 and QSL 2.1.0-alpha.4
MC 1.19-Snapshot, Quilt
Beta 2022-07-21 Get

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