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AMR is a compressed audio format optimized for speech and voice recordings. It was developed for GSM mobile phones and is commonly used in voice memos and call recordings. While not ideal for music, AMR is perfect for storing spoken audio in small file sizes.
MP4 is a multimedia container format that can store video, audio, subtitles, and images. It’s the most common format for online video streaming and playback, supporting high compression and broad compatibility. MP4 is often used with H.264 and AAC codecs.
Convert your .amr files to .mp4 right in your browser — no downloads, no installs. Everything happens securely in the cloud.
We never store your files permanently. Only you can access them, and they’re automatically deleted from our servers within 2 hours.
Turn your AMR files into MP4 in just a couple of clicks. No registration, no limits — and it’s 100% free.