Stack Deobfuscator

WARNING
This mod will become obsolete when Minecraft starts publishing releases without obfuscation, though it will still be maintained for older versions.

Discord: https://discord.gg/XSB7jn9
Web Version: https://stackdeobf.net/

See wiki for configuration

What does this mod do?

All errors displayed in the console and all crash reports will be remapped from unreadable production names (e.g. net.minecraft.class_310) to readable mapped names (e.g. net.minecraft.client.MinecraftClient).

This allows mod developers to more easily identify issues in a non-development environment, as the errors are instantly human-readable.

Comparison

Before

[23:13:08] [Render thread/ERROR]: Reported exception thrown!
net.minecraft.class_148: Manually triggered debug crash
         at net.minecraft.class_309.method_1474(class_309.java:509) ~[client-intermediary.jar:?]
         at net.minecraft.class_310.method_1574(class_310.java:1955) ~[client-intermediary.jar:?]
         at net.minecraft.class_310.method_1523(class_310.java:1180) ~[client-intermediary.jar:?]
         at net.minecraft.class_310.method_1514(class_310.java:801) ~[client-intermediary.jar:?]
         at net.minecraft.client.main.Main.main(Main.java:237) ~[minecraft-1.19.4-client.jar:?]
         at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.18.jar:?]
         at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.18.jar:?]
         at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.18.jar:?]
         at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) ~[NewLaunch.jar:?]
         at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) ~[NewLaunch.jar:?]
         at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) ~[NewLaunch.jar:?]
Caused by: java.lang.Throwable: Manually triggered debug crash
         at net.minecraft.class_309.method_1474(class_309.java:506) ~[client-intermediary.jar:?]
         ... 10 more

After (yarn/quilt mappings)

[23:11:25] [Render thread/ERROR]: Reported exception thrown!
net.minecraft.util.crash.CrashException: Manually triggered debug crash
         at net.minecraft.client.Keyboard.pollDebugCrash(Keyboard.java:509) ~[client-intermediary.jar:?]
         at net.minecraft.client.MinecraftClient.tick(MinecraftClient.java:1955) ~[client-intermediary.jar:?]
         at net.minecraft.client.MinecraftClient.render(MinecraftClient.java:1180) ~[client-intermediary.jar:?]
         at net.minecraft.client.MinecraftClient.run(MinecraftClient.java:801) ~[client-intermediary.jar:?]
         at net.minecraft.client.main.Main.main(Main.java:237) ~[minecraft-1.19.4-client.jar:?]
         at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.18.jar:?]
         at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.18.jar:?]
         at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.18.jar:?]
         at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) ~[NewLaunch.jar:?]
         at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) ~[NewLaunch.jar:?]
         at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) ~[NewLaunch.jar:?]
Caused by: java.lang.Throwable: Manually triggered debug crash
         at net.minecraft.client.Keyboard.pollDebugCrash(Keyboard.java:506) ~[client-intermediary.jar:?]
         ... 10 more

After (mojang mappings)

[23:04:12] [Render thread/ERROR]: Reported exception thrown!
net.minecraft.ReportedException: Manually triggered debug crash
         at net.minecraft.client.KeyboardHandler.tick(KeyboardHandler.java:509) ~[client-intermediary.jar:?]
         at net.minecraft.client.Minecraft.tick(Minecraft.java:1955) ~[client-intermediary.jar:?]
         at net.minecraft.client.Minecraft.runTick(Minecraft.java:1180) ~[client-intermediary.jar:?]
         at net.minecraft.client.Minecraft.run(Minecraft.java:801) ~[client-intermediary.jar:?]
         at net.minecraft.client.main.Main.main(Main.java:237) ~[minecraft-1.19.4-client.jar:?]
         at net.fabricmc.loader.impl.game.minecraft.MinecraftGameProvider.launch(MinecraftGameProvider.java:462) ~[fabric-loader-0.14.18.jar:?]
         at net.fabricmc.loader.impl.launch.knot.Knot.launch(Knot.java:74) ~[fabric-loader-0.14.18.jar:?]
         at net.fabricmc.loader.impl.launch.knot.KnotClient.main(KnotClient.java:23) ~[fabric-loader-0.14.18.jar:?]
         at org.prismlauncher.launcher.impl.StandardLauncher.launch(StandardLauncher.java:88) ~[NewLaunch.jar:?]
         at org.prismlauncher.EntryPoint.listen(EntryPoint.java:126) ~[NewLaunch.jar:?]
         at org.prismlauncher.EntryPoint.main(EntryPoint.java:71) ~[NewLaunch.jar:?]
Caused by: java.lang.Throwable: Manually triggered debug crash
         at net.minecraft.client.KeyboardHandler.tick(KeyboardHandler.java:506) ~[client-intermediary.jar:?]
         ... 10 more

Mappings Overview

Mappings are downloaded and parsed asynchronously. They are downloaded only once per version. Yarn and Quilt refresh their version every 48 hours to check for updates.

Mappings	Compatible Minecraft Versions	Download Size (zipped¹)²	Cached Size (gzipped)²
Yarn	18w49a (1.14 snapshot) or higher	`1.4 MiB`	`1.4 MiB`
Quilt	1.18.2 or higher	`1.4 MiB` (+`1.1 MiB` below 1.19.2)	`1.4 MiB` (+`1.1 MiB` below 1.19.2)
Mojang	1.14.4 and 19w36a (1.15 snapshot) or higher	`9.0 MiB` (uncompressed) + `559.1 KiB`	`1.3 MiB` + `558.6 KiB`

¹: Mojang mappings are not compressed
²: Sizes as of 12th May 2024 (1.20.6 is latest)

StackDeobfuscator

Compatibility

Minecraft: Java Edition

Platforms

Supported environments

Links

Creators

Details

Stack Deobfuscator

What does this mod do?

Comparison

Mappings Overview