Any file up to 500 MB. Drop several files and they come back as one ZIP. Many image, audio and video conversions run in your browser; anything else is uploaded and removed within the hour.
Easily convert your AAC audio files to M4A format for better compatibility with Apple ecosystem devices. This tool ensures your audio tracks remain ready for playback on iTunes, QuickTime, and iOS devices.
Both AAC and M4A are media containers based on the MPEG-4 Part 14 standard. While AAC is primarily a compressed audio format often used for streaming, M4A acts as a specialized container for audio-only data within the MPEG-4 family. During the conversion from AAC to M4A, the underlying audio stream remains structurally compatible, as both formats share similar encoding characteristics, ensuring the conversion process is fast and efficient.
Since both formats use the same compression technology, the audio quality remains identical to the source. The file size changes only insignificantly as the container structure is updated.
We built this project so anyone can convert files without paywalls, accounts, or hidden limits. Here is what that promise means in practice.
Every converter on ConvertX is free to use: no trials, no premium tiers, and no credit packs. We will never put core conversion features behind a subscription. Whether you convert one photo or a hundred files a week, the price stays zero.
Many image, audio, and video conversions run entirely in your browser. Your files never leave your device for those jobs. When server processing is required for documents or specialized formats, uploads are handled securely and removed automatically — typically within one hour.
A quick guide to strengths and trade-offs of popular formats — so you pick the right one before converting.
Music, podcasts, voice recordings, and sound effects.
Common extensions: MP3, WAV, FLAC, OGG, AAC, M4A, OPUS
Raster and vector graphics for web, print, and photography.
Common extensions: PNG, JPG, WebP, AVIF, GIF, SVG, HEIC, TIFF
Office files, PDFs, ebooks, and plain text.
Common extensions: PDF, DOCX, XLSX, PPTX, ODT, EPUB, TXT
Clips, streams, screen recordings, and movies.
Common extensions: MP4, WebM, MOV, MKV, AVI, MPEG
