What is the best free way to turn MP4 into no-background GIF?

The best free solution is to use the online function of AutoAGC. It provides free MP4 to GIF conversion and video background removal services, with no membership fee and no export watermark. It supports all common MP4 resolutions and durations, with fast cloud processing speed. Its core advantages are one-stop processing, lossless animation quality, simple uploading and exporting steps, which is the most cost-effective choice for users who need to make plenty of no-background GIF materials.