diff --git a/src/services/service.ts b/src/services/service.ts
index c3836ae..6c6fc1c 100755
--- a/src/services/service.ts
+++ b/src/services/service.ts
@@ -301,6 +301,30 @@ export default class Services {
     }
   }
 
+  private isFileBlob(value: any): value is { type: string, data: Uint8Array } {
+    return (
+      typeof value === 'object' &&
+      value !== null &&
+      typeof value.type === 'string' &&
+      value.data instanceof Uint8Array
+    );
+  }
+
+  private splitData(obj: Record<string, any>) {
+    const jsonCompatibleData: Record<string, any> = {};
+    const binaryData: Record<string, { type: string; data: Uint8Array }> = {};
+
+    for (const [key, value] of Object.entries(obj)) {
+      if (this.isFileBlob(value)) {
+        binaryData[key] = value;
+      } else {
+        jsonCompatibleData[key] = value;
+      }
+    }
+
+    return { jsonCompatibleData, binaryData };
+  }
+
   public async createProcess(
     privateData: Record<string, any>,
     publicData: Record<string, any>,
@@ -309,8 +333,19 @@ export default class Services {
     const relayAddress = this.getAllRelays()[0]['spAddress'];
     const feeRate = 1;
 
-    const encodedPrivateData = this.sdkClient.encode_pcd(privateData);
-    const encodedPublicData = this.sdkClient.encode_pcd(publicData);
+    // We can't encode files as the rest because Uint8Array is not valid json
+    // So we first take them apart and we will encode them separately and put them back in the right object
+    // TODO encoding of relatively large binaries (=> 1M) is a bit long now and blocking
+    const privateSplitData = this.splitData(privateData);
+    const publicSplitData = this.splitData(publicData);
+    const encodedPrivateData = { 
+      ...this.sdkClient.encode_json(privateSplitData.jsonCompatibleData), 
+      ...this.sdkClient.encode_binary(privateSplitData.binaryData)
+    };
+    const encodedPublicData = { 
+      ...this.sdkClient.encode_json(publicSplitData.jsonCompatibleData), 
+      ...this.sdkClient.encode_binary(publicSplitData.binaryData)
+    };
 
     let members: Set<Member> = new Set();
     for (const role of Object.values(roles!)) {