Convert 3GP to ALAC — Free Online Converter

3GP is the mobile multimedia container standardized by the 3GPP consortium for carriers like AT&T, Vodafone, and T-Mobile, packaging video (H.263/MPEG-4/H.264) with audio (AMR or AAC) at mobile-friendly bitrates. ALAC (Apple Lossless Audio Codec), introduced by Apple in 2004 and open-sourced in 2011, compresses PCM audio to roughly 50-60% of the original size with zero quality loss. Converting 3GP to ALAC extracts the audio, decodes it, and losslessly compresses the result into an M4A container optimized for Apple's ecosystem.

If your target playback environment is Apple devices — iPhone, iPad, Mac, Apple TV, HomePod — ALAC is the ideal lossless format because it integrates seamlessly with iTunes, Apple Music, and all Apple apps. Unlike AIFF or WAV, ALAC compresses the audio by about half while preserving every bit, saving storage on devices where space matters. This is especially valuable when archiving hundreds of 3GP recordings from an old phone: you get lossless preservation at roughly half the disk usage of raw PCM.

FFmpeg extracts the audio from the 3GP container, decodes AMR or AAC to raw PCM, then encodes the PCM using the ALAC codec into an M4A (MPEG-4 Part 14) container. The ALAC encoder preserves exact sample values while achieving typical compression ratios of 40-60%. Metadata from the source is mapped to iTunes-compatible tags where possible. Output sample rate matches the decoded source unless explicit resampling is configured.