diff --git a/package-lock.json b/package-lock.json
index e5ae7bbc..20124178 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -31,6 +31,7 @@
         "marked": "^4.0.10",
         "rfdc": "^1.3.0",
         "sourcemapped-stacktrace": "^1.1.11",
+        "spark-md5": "^3.0.2",
         "vscode-languageserver-textdocument": "^1.0.12"
       },
       "devDependencies": {
@@ -44,6 +45,7 @@
         "@types/lz-string": "^1.3.34",
         "@types/marked": "^4.0.1",
         "@types/seedrandom": "^2.4.28",
+        "@types/spark-md5": "^3.0.5",
         "@typescript-eslint/eslint-plugin": "^5.28.0",
         "@typescript-eslint/parser": "^5.28.0",
         "autoprefixer": "^10.4.16",
@@ -875,6 +877,12 @@
       "integrity": "sha512-SMA+fUwULwK7sd/ZJicUztiPs8F1yCPwF3O23Z9uQ32ME5Ha0NmDK9+QTsYE4O2tHXChzXomSWWeIhCnoN1LqA==",
       "dev": true
     },
+    "node_modules/@types/spark-md5": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/@types/spark-md5/-/spark-md5-3.0.5.tgz",
+      "integrity": "sha512-lWf05dnD42DLVKQJZrDHtWFidcLrHuip01CtnC2/S6AMhX4t9ZlEUj4iuRlAnts0PQk7KESOqKxeGE/b6sIPGg==",
+      "dev": true
+    },
     "node_modules/@types/trusted-types": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.2.tgz",
@@ -1544,9 +1552,9 @@
       "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
     },
     "node_modules/cross-spawn": {
-      "version": "7.0.3",
-      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
-      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
+      "integrity": "sha512-uV2QOWP2nWzsy2aMp8aRibhi9dlzF5Hgh5SHaB9OiTGEyDTiJJyx0uy51QXdyWbtAHNua4XJzUKca3OzKUd3vA==",
       "dev": true,
       "dependencies": {
         "path-key": "^3.1.0",
@@ -3973,6 +3981,11 @@
         "node": ">=0.10.0"
       }
     },
+    "node_modules/spark-md5": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/spark-md5/-/spark-md5-3.0.2.tgz",
+      "integrity": "sha512-wcFzz9cDfbuqe0FZzfi2or1sgyIrsDwmPwfZC4hiNidPdPINjeUwNfv5kldczoEAcjl9Y1L3SM7Uz2PUEQzxQw=="
+    },
     "node_modules/sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
@@ -5304,6 +5317,12 @@
       "integrity": "sha512-SMA+fUwULwK7sd/ZJicUztiPs8F1yCPwF3O23Z9uQ32ME5Ha0NmDK9+QTsYE4O2tHXChzXomSWWeIhCnoN1LqA==",
       "dev": true
     },
+    "@types/spark-md5": {
+      "version": "3.0.5",
+      "resolved": "https://registry.npmjs.org/@types/spark-md5/-/spark-md5-3.0.5.tgz",
+      "integrity": "sha512-lWf05dnD42DLVKQJZrDHtWFidcLrHuip01CtnC2/S6AMhX4t9ZlEUj4iuRlAnts0PQk7KESOqKxeGE/b6sIPGg==",
+      "dev": true
+    },
     "@types/trusted-types": {
       "version": "2.0.2",
       "resolved": "https://registry.npmjs.org/@types/trusted-types/-/trusted-types-2.0.2.tgz",
@@ -5726,9 +5745,9 @@
       "integrity": "sha512-ZQBvi1DcpJ4GDqanjucZ2Hj3wEO5pZDS89BWbkcrvdxksJorwUDDZamX9ldFkp9aw2lmBDLgkObEA4DWNJ9FYQ=="
     },
     "cross-spawn": {
-      "version": "7.0.3",
-      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.3.tgz",
-      "integrity": "sha512-iRDPJKUPVEND7dHPO8rkbOnPpyDygcDFtWjpeWNCgy8WP2rXcxXL8TskReQl6OrB2G7+UJrags1q15Fudc7G6w==",
+      "version": "7.0.6",
+      "resolved": "https://registry.npmjs.org/cross-spawn/-/cross-spawn-7.0.6.tgz",
+      "integrity": "sha512-uV2QOWP2nWzsy2aMp8aRibhi9dlzF5Hgh5SHaB9OiTGEyDTiJJyx0uy51QXdyWbtAHNua4XJzUKca3OzKUd3vA==",
       "dev": true,
       "requires": {
         "path-key": "^3.1.0",
@@ -7388,6 +7407,11 @@
         }
       }
     },
+    "spark-md5": {
+      "version": "3.0.2",
+      "resolved": "https://registry.npmjs.org/spark-md5/-/spark-md5-3.0.2.tgz",
+      "integrity": "sha512-wcFzz9cDfbuqe0FZzfi2or1sgyIrsDwmPwfZC4hiNidPdPINjeUwNfv5kldczoEAcjl9Y1L3SM7Uz2PUEQzxQw=="
+    },
     "sprintf-js": {
       "version": "1.0.3",
       "resolved": "https://registry.npmjs.org/sprintf-js/-/sprintf-js-1.0.3.tgz",
diff --git a/package.json b/package.json
index 21db4bf5..fb603aea 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
     "marked": "^4.0.10",
     "rfdc": "^1.3.0",
     "sourcemapped-stacktrace": "^1.1.11",
+    "spark-md5": "^3.0.2",
     "vscode-languageserver-textdocument": "^1.0.12"
   },
   "devDependencies": {
@@ -50,6 +51,7 @@
     "@types/lz-string": "^1.3.34",
     "@types/marked": "^4.0.1",
     "@types/seedrandom": "^2.4.28",
+    "@types/spark-md5": "^3.0.5",
     "@typescript-eslint/eslint-plugin": "^5.28.0",
     "@typescript-eslint/parser": "^5.28.0",
     "autoprefixer": "^10.4.16",
diff --git a/src/app/services/Spyglass.ts b/src/app/services/Spyglass.ts
index ee041ef9..b59e73f6 100644
--- a/src/app/services/Spyglass.ts
+++ b/src/app/services/Spyglass.ts
@@ -7,6 +7,7 @@ import { localize } from '@spyglassmc/locales'
 import * as mcdoc from '@spyglassmc/mcdoc'
 import * as nbt from '@spyglassmc/nbt'
 import * as zip from '@zip.js/zip.js'
+import sparkmd5 from 'spark-md5'
 import { TextDocument } from 'vscode-languageserver-textdocument'
 import type { ConfigGenerator } from '../Config.js'
 import siteConfig from '../Config.js'
@@ -59,6 +60,15 @@ export class SpyglassClient {
 			...BrowserExternals.archive,
 			decompressBall,
 		},
+		crypto: {
+			// Swap the web crypto sha1 for an md5 implementation, which is about twice as fast
+			getSha1: async (data: string | Uint8Array) => {
+				if (typeof data === 'string') {
+					data = new TextEncoder().encode(data)
+				}
+				return sparkmd5.ArrayBuffer.hash(data)
+			},
+		},
 		fs: SpyglassClient.FS,
 	}