diff --git a/.changes/fs-writeTextFile-utf8-path.md b/.changes/fs-writeTextFile-utf8-path.md
new file mode 100644
index 000000000..561e83e32
--- /dev/null
+++ b/.changes/fs-writeTextFile-utf8-path.md
@@ -0,0 +1,5 @@
+---
+"fs-js": "patch"
+---
+
+Fix `writeTextFile` converting UTF-8 characters (for example `äöü`) in the given path into replacement character (`�`)
\ No newline at end of file
diff --git a/plugins/fs/api-iife.js b/plugins/fs/api-iife.js
index e863d7a93..f1e5360b9 100644
--- a/plugins/fs/api-iife.js
+++ b/plugins/fs/api-iife.js
@@ -1 +1 @@
-if("__TAURI__"in window){var __TAURI_PLUGIN_FS__=function(t){"use strict";function e(t,e,n,i){if("a"===n&&!i)throw new TypeError("Private accessor was defined without a getter");if("function"==typeof e?t!==e||!i:!e.has(t))throw new TypeError("Cannot read private member from an object whose class did not declare it");return"m"===n?i:"a"===n?i.call(t):i?i.value:e.get(t)}function n(t,e,n,i,o){if("function"==typeof e?t!==e||!o:!e.has(t))throw new TypeError("Cannot write private member to an object whose class did not declare it");return e.set(t,n),n}var i,o,r,a,s,c;"function"==typeof SuppressedError&&SuppressedError;class f{constructor(){this.__TAURI_CHANNEL_MARKER__=!0,i.set(this,(()=>{})),o.set(this,0),r.set(this,{}),this.id=function(t,e=!1){return window.__TAURI_INTERNALS__.transformCallback(t,e)}((({message:t,id:a})=>{if(a===e(this,o,"f")){n(this,o,a+1),e(this,i,"f").call(this,t);const s=Object.keys(e(this,r,"f"));if(s.length>0){let t=a+1;for(const n of s.sort()){if(parseInt(n)!==t)break;{const o=e(this,r,"f")[n];delete e(this,r,"f")[n],e(this,i,"f").call(this,o),t+=1}}n(this,o,t)}}else e(this,r,"f")[a.toString()]=t}))}set onmessage(t){n(this,i,t)}get onmessage(){return e(this,i,"f")}toJSON(){return`__CHANNEL__:${this.id}`}}async function l(t,e={},n){return window.__TAURI_INTERNALS__.invoke(t,e,n)}i=new WeakMap,o=new WeakMap,r=new WeakMap;class u{get rid(){return e(this,a,"f")}constructor(t){a.set(this,void 0),n(this,a,t)}async close(){return l("plugin:resources|close",{rid:this.rid})}}function p(t){return{isFile:t.isFile,isDirectory:t.isDirectory,isSymlink:t.isSymlink,size:t.size,mtime:null!==t.mtime?new Date(t.mtime):null,atime:null!==t.atime?new Date(t.atime):null,birthtime:null!==t.birthtime?new Date(t.birthtime):null,readonly:t.readonly,fileAttributes:t.fileAttributes,dev:t.dev,ino:t.ino,mode:t.mode,nlink:t.nlink,uid:t.uid,gid:t.gid,rdev:t.rdev,blksize:t.blksize,blocks:t.blocks}}a=new WeakMap,t.BaseDirectory=void 0,(s=t.BaseDirectory||(t.BaseDirectory={}))[s.Audio=1]="Audio",s[s.Cache=2]="Cache",s[s.Config=3]="Config",s[s.Data=4]="Data",s[s.LocalData=5]="LocalData",s[s.Document=6]="Document",s[s.Download=7]="Download",s[s.Picture=8]="Picture",s[s.Public=9]="Public",s[s.Video=10]="Video",s[s.Resource=11]="Resource",s[s.Temp=12]="Temp",s[s.AppConfig=13]="AppConfig",s[s.AppData=14]="AppData",s[s.AppLocalData=15]="AppLocalData",s[s.AppCache=16]="AppCache",s[s.AppLog=17]="AppLog",s[s.Desktop=18]="Desktop",s[s.Executable=19]="Executable",s[s.Font=20]="Font",s[s.Home=21]="Home",s[s.Runtime=22]="Runtime",s[s.Template=23]="Template",t.SeekMode=void 0,(c=t.SeekMode||(t.SeekMode={}))[c.Start=0]="Start",c[c.Current=1]="Current",c[c.End=2]="End";class w extends u{async read(t){if(0===t.byteLength)return 0;const e=await l("plugin:fs|read",{rid:this.rid,len:t.byteLength}),n=function(t){const e=new Uint8ClampedArray(t),n=e.byteLength;let i=0;for(let t=0;t<n;t++)i*=256,i+=e[t];return i}(e.slice(-8)),i=e instanceof ArrayBuffer?new Uint8Array(e):e;return t.set(i.slice(0,i.length-8)),0===n?null:n}async seek(t,e){return await l("plugin:fs|seek",{rid:this.rid,offset:t,whence:e})}async stat(){return p(await l("plugin:fs|fstat",{rid:this.rid}))}async truncate(t){await l("plugin:fs|ftruncate",{rid:this.rid,len:t})}async write(t){return await l("plugin:fs|write",{rid:this.rid,data:t})}}async function h(t){await l("plugin:fs|unwatch",{rid:t})}return t.FileHandle=w,t.copyFile=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol||e instanceof URL&&"file:"!==e.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|copy_file",{fromPath:t instanceof URL?t.toString():t,toPath:e instanceof URL?e.toString():e,options:n})},t.create=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=await l("plugin:fs|create",{path:t instanceof URL?t.toString():t,options:e});return new w(n)},t.exists=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");return await l("plugin:fs|exists",{path:t instanceof URL?t.toString():t,options:e})},t.lstat=async function(t,e){return p(await l("plugin:fs|lstat",{path:t instanceof URL?t.toString():t,options:e}))},t.mkdir=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|mkdir",{path:t instanceof URL?t.toString():t,options:e})},t.open=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=await l("plugin:fs|open",{path:t instanceof URL?t.toString():t,options:e});return new w(n)},t.readDir=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");return await l("plugin:fs|read_dir",{path:t instanceof URL?t.toString():t,options:e})},t.readFile=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=await l("plugin:fs|read_file",{path:t instanceof URL?t.toString():t,options:e});return n instanceof ArrayBuffer?new Uint8Array(n):Uint8Array.from(n)},t.readTextFile=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");return await l("plugin:fs|read_text_file",{path:t instanceof URL?t.toString():t,options:e})},t.readTextFileLines=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=t instanceof URL?t.toString():t;return await Promise.resolve({path:n,rid:null,async next(){null===this.rid&&(this.rid=await l("plugin:fs|read_text_file_lines",{path:n,options:e}));const[t,i]=await l("plugin:fs|read_text_file_lines_next",{rid:this.rid});return i&&(this.rid=null),{value:i?"":t,done:i}},[Symbol.asyncIterator](){return this}})},t.remove=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|remove",{path:t instanceof URL?t.toString():t,options:e})},t.rename=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol||e instanceof URL&&"file:"!==e.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|rename",{oldPath:t instanceof URL?t.toString():t,newPath:e instanceof URL?e.toString():e,options:n})},t.stat=async function(t,e){return p(await l("plugin:fs|stat",{path:t instanceof URL?t.toString():t,options:e}))},t.truncate=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|truncate",{path:t instanceof URL?t.toString():t,len:e,options:n})},t.watch=async function(t,e,n){const i={recursive:!1,delayMs:2e3,...n},o=Array.isArray(t)?t:[t];for(const t of o)if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const r=new f;r.onmessage=e;const a=await l("plugin:fs|watch",{paths:o.map((t=>t instanceof URL?t.toString():t)),options:i,onEvent:r});return()=>{h(a)}},t.watchImmediate=async function(t,e,n){const i={recursive:!1,...n,delayMs:null},o=Array.isArray(t)?t:[t];for(const t of o)if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const r=new f;r.onmessage=e;const a=await l("plugin:fs|watch",{paths:o.map((t=>t instanceof URL?t.toString():t)),options:i,onEvent:r});return()=>{h(a)}},t.writeFile=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|write_file",e,{headers:{path:encodeURIComponent(t instanceof URL?t.toString():t),options:JSON.stringify(n)}})},t.writeTextFile=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const i=new TextEncoder;await l("plugin:fs|write_text_file",i.encode(e),{headers:{path:t instanceof URL?t.toString():t,options:JSON.stringify(n)}})},t}({});Object.defineProperty(window.__TAURI__,"fs",{value:__TAURI_PLUGIN_FS__})}
+if("__TAURI__"in window){var __TAURI_PLUGIN_FS__=function(t){"use strict";function e(t,e,n,i){if("a"===n&&!i)throw new TypeError("Private accessor was defined without a getter");if("function"==typeof e?t!==e||!i:!e.has(t))throw new TypeError("Cannot read private member from an object whose class did not declare it");return"m"===n?i:"a"===n?i.call(t):i?i.value:e.get(t)}function n(t,e,n,i,o){if("function"==typeof e?t!==e||!o:!e.has(t))throw new TypeError("Cannot write private member to an object whose class did not declare it");return e.set(t,n),n}var i,o,r,a,s,c;"function"==typeof SuppressedError&&SuppressedError;class f{constructor(){this.__TAURI_CHANNEL_MARKER__=!0,i.set(this,(()=>{})),o.set(this,0),r.set(this,{}),this.id=function(t,e=!1){return window.__TAURI_INTERNALS__.transformCallback(t,e)}((({message:t,id:a})=>{if(a===e(this,o,"f")){n(this,o,a+1),e(this,i,"f").call(this,t);const s=Object.keys(e(this,r,"f"));if(s.length>0){let t=a+1;for(const n of s.sort()){if(parseInt(n)!==t)break;{const o=e(this,r,"f")[n];delete e(this,r,"f")[n],e(this,i,"f").call(this,o),t+=1}}n(this,o,t)}}else e(this,r,"f")[a.toString()]=t}))}set onmessage(t){n(this,i,t)}get onmessage(){return e(this,i,"f")}toJSON(){return`__CHANNEL__:${this.id}`}}async function l(t,e={},n){return window.__TAURI_INTERNALS__.invoke(t,e,n)}i=new WeakMap,o=new WeakMap,r=new WeakMap;class u{get rid(){return e(this,a,"f")}constructor(t){a.set(this,void 0),n(this,a,t)}async close(){return l("plugin:resources|close",{rid:this.rid})}}function p(t){return{isFile:t.isFile,isDirectory:t.isDirectory,isSymlink:t.isSymlink,size:t.size,mtime:null!==t.mtime?new Date(t.mtime):null,atime:null!==t.atime?new Date(t.atime):null,birthtime:null!==t.birthtime?new Date(t.birthtime):null,readonly:t.readonly,fileAttributes:t.fileAttributes,dev:t.dev,ino:t.ino,mode:t.mode,nlink:t.nlink,uid:t.uid,gid:t.gid,rdev:t.rdev,blksize:t.blksize,blocks:t.blocks}}a=new WeakMap,t.BaseDirectory=void 0,(s=t.BaseDirectory||(t.BaseDirectory={}))[s.Audio=1]="Audio",s[s.Cache=2]="Cache",s[s.Config=3]="Config",s[s.Data=4]="Data",s[s.LocalData=5]="LocalData",s[s.Document=6]="Document",s[s.Download=7]="Download",s[s.Picture=8]="Picture",s[s.Public=9]="Public",s[s.Video=10]="Video",s[s.Resource=11]="Resource",s[s.Temp=12]="Temp",s[s.AppConfig=13]="AppConfig",s[s.AppData=14]="AppData",s[s.AppLocalData=15]="AppLocalData",s[s.AppCache=16]="AppCache",s[s.AppLog=17]="AppLog",s[s.Desktop=18]="Desktop",s[s.Executable=19]="Executable",s[s.Font=20]="Font",s[s.Home=21]="Home",s[s.Runtime=22]="Runtime",s[s.Template=23]="Template",t.SeekMode=void 0,(c=t.SeekMode||(t.SeekMode={}))[c.Start=0]="Start",c[c.Current=1]="Current",c[c.End=2]="End";class w extends u{async read(t){if(0===t.byteLength)return 0;const e=await l("plugin:fs|read",{rid:this.rid,len:t.byteLength}),n=function(t){const e=new Uint8ClampedArray(t),n=e.byteLength;let i=0;for(let t=0;t<n;t++)i*=256,i+=e[t];return i}(e.slice(-8)),i=e instanceof ArrayBuffer?new Uint8Array(e):e;return t.set(i.slice(0,i.length-8)),0===n?null:n}async seek(t,e){return await l("plugin:fs|seek",{rid:this.rid,offset:t,whence:e})}async stat(){return p(await l("plugin:fs|fstat",{rid:this.rid}))}async truncate(t){await l("plugin:fs|ftruncate",{rid:this.rid,len:t})}async write(t){return await l("plugin:fs|write",{rid:this.rid,data:t})}}async function h(t){await l("plugin:fs|unwatch",{rid:t})}return t.FileHandle=w,t.copyFile=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol||e instanceof URL&&"file:"!==e.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|copy_file",{fromPath:t instanceof URL?t.toString():t,toPath:e instanceof URL?e.toString():e,options:n})},t.create=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=await l("plugin:fs|create",{path:t instanceof URL?t.toString():t,options:e});return new w(n)},t.exists=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");return await l("plugin:fs|exists",{path:t instanceof URL?t.toString():t,options:e})},t.lstat=async function(t,e){return p(await l("plugin:fs|lstat",{path:t instanceof URL?t.toString():t,options:e}))},t.mkdir=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|mkdir",{path:t instanceof URL?t.toString():t,options:e})},t.open=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=await l("plugin:fs|open",{path:t instanceof URL?t.toString():t,options:e});return new w(n)},t.readDir=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");return await l("plugin:fs|read_dir",{path:t instanceof URL?t.toString():t,options:e})},t.readFile=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=await l("plugin:fs|read_file",{path:t instanceof URL?t.toString():t,options:e});return n instanceof ArrayBuffer?new Uint8Array(n):Uint8Array.from(n)},t.readTextFile=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");return await l("plugin:fs|read_text_file",{path:t instanceof URL?t.toString():t,options:e})},t.readTextFileLines=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const n=t instanceof URL?t.toString():t;return await Promise.resolve({path:n,rid:null,async next(){null===this.rid&&(this.rid=await l("plugin:fs|read_text_file_lines",{path:n,options:e}));const[t,i]=await l("plugin:fs|read_text_file_lines_next",{rid:this.rid});return i&&(this.rid=null),{value:i?"":t,done:i}},[Symbol.asyncIterator](){return this}})},t.remove=async function(t,e){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|remove",{path:t instanceof URL?t.toString():t,options:e})},t.rename=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol||e instanceof URL&&"file:"!==e.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|rename",{oldPath:t instanceof URL?t.toString():t,newPath:e instanceof URL?e.toString():e,options:n})},t.stat=async function(t,e){return p(await l("plugin:fs|stat",{path:t instanceof URL?t.toString():t,options:e}))},t.truncate=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|truncate",{path:t instanceof URL?t.toString():t,len:e,options:n})},t.watch=async function(t,e,n){const i={recursive:!1,delayMs:2e3,...n},o=Array.isArray(t)?t:[t];for(const t of o)if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const r=new f;r.onmessage=e;const a=await l("plugin:fs|watch",{paths:o.map((t=>t instanceof URL?t.toString():t)),options:i,onEvent:r});return()=>{h(a)}},t.watchImmediate=async function(t,e,n){const i={recursive:!1,...n,delayMs:null},o=Array.isArray(t)?t:[t];for(const t of o)if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const r=new f;r.onmessage=e;const a=await l("plugin:fs|watch",{paths:o.map((t=>t instanceof URL?t.toString():t)),options:i,onEvent:r});return()=>{h(a)}},t.writeFile=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");await l("plugin:fs|write_file",e,{headers:{path:encodeURIComponent(t instanceof URL?t.toString():t),options:JSON.stringify(n)}})},t.writeTextFile=async function(t,e,n){if(t instanceof URL&&"file:"!==t.protocol)throw new TypeError("Must be a file URL.");const i=new TextEncoder;await l("plugin:fs|write_text_file",i.encode(e),{headers:{path:encodeURIComponent(t instanceof URL?t.toString():t),options:JSON.stringify(n)}})},t}({});Object.defineProperty(window.__TAURI__,"fs",{value:__TAURI_PLUGIN_FS__})}
diff --git a/plugins/fs/guest-js/index.ts b/plugins/fs/guest-js/index.ts
index 57e7518d5..ed8749d71 100644
--- a/plugins/fs/guest-js/index.ts
+++ b/plugins/fs/guest-js/index.ts
@@ -1072,7 +1072,7 @@ async function writeTextFile(
 
   await invoke('plugin:fs|write_text_file', encoder.encode(data), {
     headers: {
-      path: path instanceof URL ? path.toString() : path,
+      path: encodeURIComponent(path instanceof URL ? path.toString() : path),
       options: JSON.stringify(options)
     }
   })