Bulk Image Conversion API in Python

pip install requests

import requests
import os
from pathlib import Path

API_KEY = "YOUR_API_KEY"
TO_FORMAT = "webp"  # Change to: png, jpg, tiff, gif, etc.

def convert_image(input_path: str, output_path: str):
    headers = {"Authorization": f"Bearer {API_KEY}"}
    with open(input_path, "rb") as f:
        response = requests.post(
            "https://convertfleet.com/api/convert",
            files={"file": f},
            data={"to": TO_FORMAT},
            headers=headers
        )
    response.raise_for_status()
    with open(output_path, "wb") as out:
        out.write(response.content)

# Bulk convert all PNGs in a folder
input_folder = Path("./images")
output_folder = Path("./images_webp")
output_folder.mkdir(exist_ok=True)

for img_path in input_folder.glob("*.png"):
    output_path = output_folder / f"{img_path.stem}.{TO_FORMAT}"
    print(f"Converting {img_path.name}...")
    convert_image(str(img_path), str(output_path))

print("All images converted!")