diff --git a/lib/launcher.js b/lib/launcher.js
index 068fd334..a2471f9d 100644
--- a/lib/launcher.js
+++ b/lib/launcher.js
@@ -1,3 +1,4 @@
+const bytes = require('bytes')
 const childProcess = require('child_process')
 const { existsSync } = require('fs')
 const fs = require('fs/promises')
@@ -294,6 +295,10 @@ class Launcher {
             ]
         }
 
+        if (this.settings?.editor?.apiMaxLength) {
+            settings.apiMaxLength = bytes(this.settings.editor.apiMaxLength)
+        }
+
         // if licensed, add palette catalogues
         if (this.config.licensed) {
             if (this.project) {
diff --git a/lib/template/template-settings.js b/lib/template/template-settings.js
index cbf6ebce..06e5b664 100644
--- a/lib/template/template-settings.js
+++ b/lib/template/template-settings.js
@@ -178,6 +178,13 @@ const runtimeSettings = {
     editorTheme: { ...editorTheme }
 }
 
+if (settings.apiMaxLength) {
+    runtimeSettings.apiMaxLength = settings.apiMaxLength
+    runtimeSettings.ui = {
+        maxHttpBufferSize: settings.apiMaxLength
+    }
+}
+
 if (!settings.localAuth?.enabled) {
     runtimeSettings.editorTheme.login = {
         message: 'Access the editor through the FlowFuse platform'
diff --git a/package-lock.json b/package-lock.json
index 2d25580c..6cf68623 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,6 +12,7 @@
                 "@flowfuse/nr-theme": "^1.8.0",
                 "@inquirer/confirm": "^5.1.9",
                 "@inquirer/select": "^4.2.0",
+                "bytes": "^3.1.2",
                 "command-line-args": "^6.0.1",
                 "command-line-usage": "^7.0.3",
                 "express-session": "^1.18.0",
@@ -1902,6 +1903,15 @@
             "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
             "integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ=="
         },
+        "node_modules/bytes": {
+            "version": "3.1.2",
+            "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
+            "integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg==",
+            "license": "MIT",
+            "engines": {
+                "node": ">= 0.8"
+            }
+        },
         "node_modules/cacheable-lookup": {
             "version": "5.0.4",
             "resolved": "https://registry.npmjs.org/cacheable-lookup/-/cacheable-lookup-5.0.4.tgz",
@@ -8427,6 +8437,11 @@
             "resolved": "https://registry.npmjs.org/buffer-from/-/buffer-from-1.1.2.tgz",
             "integrity": "sha512-E+XQCRwSbaaiChtv6k6Dwgc+bx+Bs6vuKJHHl5kox/BaKbhiXzqQOwK4cO22yElGp2OCmjwVhT3HmxgyPGnJfQ=="
         },
+        "bytes": {
+            "version": "3.1.2",
+            "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
+            "integrity": "sha512-/Nf7TyzTx6S3yRJObOAV7956r8cr2+Oj8AC5dt8wSP3BQAoeX58NoHyCU8P8zGkNXStjTSi6fzO6F0pBdcYbEg=="
+        },
         "cacheable-lookup": {
             "version": "5.0.4",
             "resolved": "https://registry.npmjs.org/cacheable-lookup/-/cacheable-lookup-5.0.4.tgz",
diff --git a/package.json b/package.json
index 176abe31..7aa09950 100644
--- a/package.json
+++ b/package.json
@@ -38,6 +38,7 @@
         "@flowfuse/nr-theme": "^1.8.0",
         "@inquirer/confirm": "^5.1.9",
         "@inquirer/select": "^4.2.0",
+        "bytes": "^3.1.2",
         "command-line-args": "^6.0.1",
         "command-line-usage": "^7.0.3",
         "express-session": "^1.18.0",
diff --git a/test/unit/lib/template-settings_spec.js b/test/unit/lib/template-settings_spec.js
index cb02280e..93e66d52 100644
--- a/test/unit/lib/template-settings_spec.js
+++ b/test/unit/lib/template-settings_spec.js
@@ -23,9 +23,9 @@ describe('template-settings', () => {
         dir: '',
         verbose: true
     }
-    async function generateSettingsFile (_config) {
+    async function generateSettingsFile (_config, _settings) {
         _config = Object.assign({}, config, _config)
-        const launcher = newLauncher({ config: _config }, null, 'PROJECTID', setup.snapshot)
+        const launcher = newLauncher({ config: _config }, null, 'PROJECTID', setup.snapshot, _settings || undefined)
         await launcher.writeSettings()
         settingsFilePath = path.join(config.dir, 'project', 'settings.js')
         return settingsFilePath
@@ -203,6 +203,21 @@ describe('template-settings', () => {
         settings.httpNodeAuth.should.have.a.property('pass', '$123456789')
     })
 
+    it('should set the apiMaxLength and ui.maxHttpBufferSize option if provided', async function () {
+        const extraConfig = {}
+        const extraSettings = {
+            editor: {
+                apiMaxLength: '1mb'
+            }
+        }
+        const settingsFile = await generateSettingsFile(extraConfig, extraSettings)
+        const settings = require(settingsFile)
+        should.exist(settings)
+        settings.should.have.a.property('apiMaxLength', 1048576)
+        settings.should.have.a.property('ui').and.be.an.Object()
+        settings.ui.should.have.a.property('maxHttpBufferSize', 1048576)
+    })
+
     it('should set adminAuth.type and users array when valid localAuth options are provided and enabled', async function () {
         const extraConfig = {
             localAuth: {