diff --git a/modules/api/api.py b/modules/api/api.py
index 7a567be3..648bd6a8 100644
--- a/modules/api/api.py
+++ b/modules/api/api.py
@@ -3,6 +3,7 @@ import io
 import time
 import uvicorn
 from threading import Lock
+from io import BytesIO
 from gradio.processing_utils import encode_pil_to_base64, decode_base64_to_file, decode_base64_to_image
 from fastapi import APIRouter, Depends, FastAPI, HTTPException
 from fastapi.security import HTTPBasic, HTTPBasicCredentials
@@ -13,7 +14,7 @@ from modules import sd_samplers, deepbooru
 from modules.api.models import *
 from modules.processing import StableDiffusionProcessingTxt2Img, StableDiffusionProcessingImg2Img, process_images
 from modules.extras import run_extras, run_pnginfo
-from PIL import PngImagePlugin
+from PIL import PngImagePlugin,Image
 from modules.sd_models import checkpoints_list
 from modules.realesrgan_model import get_realesrgan_models
 from typing import List
@@ -133,7 +134,10 @@ class Api:
 
         mask = img2imgreq.mask
         if mask:
-            mask = decode_base64_to_image(mask)
+            if mask.startswith("data:image/"):
+                mask = decode_base64_to_image(mask)
+            else:
+                mask = Image.open(BytesIO(base64.b64decode(mask)))
 
         populate = img2imgreq.copy(update={ # Override __init__ params
             "sd_model": shared.sd_model,
@@ -147,7 +151,10 @@ class Api:
 
         imgs = []
         for img in init_images:
-            img = decode_base64_to_image(img)
+            if img.startswith("data:image/"):
+                img = decode_base64_to_image(img)
+            else:
+                img = Image.open(BytesIO(base64.b64decode(img)))
             imgs = [img] * p.batch_size
 
         p.init_images = imgs