MP3 to M4A converter
Repackage MP3 audio as M4A in your browser. Useful for Apple ecosystems and apps that prefer AAC.
File converter
0 files
Every file. A new possibility.
Images, audio, documents and video. Pick your files and give them a new format.
or drop your files hereSupported formats
Images
.png, .jpeg, .jpg, .webp, .gif, .svg, .jxl, .avif, .heic*, .heif*, .ico, .bmp, .cur, .ani*, .icns*, .nef*, .cr2*, .hdr, .jpe, .mat, .pbm, .pfm, .pgm, .pnm, .ppm, .tiff, .jfif, .eps*, .psd, .arw*, .tif, .dng*, .xcf*, .rw2*, .raf*, .orf*, .pef*, .mos*, .raw*, .dcr*, .crw*, .cr3*, .3fr*, .erf*, .mrw*, .mef*, .nrw*, .srw*, .sr2*, .srf*, .a*, .aai, .ai*, .art*, .avs, .b*, .bgr*, .bgra*, .bgro*, .bmp2, .bmp3, .brf*, .cal*, .cals*, .cin, .cip*, .cmyk*, .cmyka*, .dcx, .dds, .dpx, .dxt1, .dxt5, .epdf*, .epi*, .eps2*, .eps3*, .epsf*, .epsi*, .ept*, .ept2*, .ept3*, .exr, .farbfeld, .fax, .ff, .fit, .fits, .fl32, .fts, .ftxt*, .g*, .g3, .g4*, .gif87, .gray*, .graya*, .group4*, .hrz, .icb, .icon, .info*, .ipl, .isobrl*, .isobrl6*, .j2c, .j2k, .jng, .jp2, .jpc, .jpm, .jps, .map*, .miff, .mng, .mono*, .mtv, .o*, .otb, .pal*, .palm, .pam, .pcd, .pcds, .pcl*, .pct, .pcx, .pdb, .pgx, .phm, .picon, .pict, .pjpeg, .png00, .png24, .png32, .png48, .png64, .png8, .ps*, .ps1*, .ps2*, .ps3*, .psb, .ptif, .qoi, .r*, .ras, .rgb*, .rgba*, .rgbo*, .rgf, .sgi, .six, .sixel, .sparse-color*, .strimg*, .sun, .svgz*, .tga, .tiff64, .ubrl*, .ubrl6*, .uil*, .uyvy*, .vda, .vicar, .viff, .vips, .vst, .wbmp, .wpg, .xbm, .xpm, .xv, .ycbcr*, .ycbcra*, .yuv*
Audio
.mp3, .wav, .flac, .ogg, .mogg*, .oga, .opus, .aac, .alac, .m4a, .caf*, .wma, .amr, .ac3, .aiff, .aifc, .aif, .mp1*, .mp2, .mpc*, .dsd*, .dsf*, .dff*, .mqa*, .au, .m4b, .voc, .weba, .mkv*, .mp4*, .avi*, .mov*, .webm*, .ts*, .mts*, .m2ts*, .wmv*, .mpg*, .mpeg*, .flv*, .f4v*, .vob*, .m4v*, .3gp*, .3g2*, .mxf*, .ogv*, .rm*, .rmvb*, .divx*
Documents
.docx, .doc, .md, .html, .rtf, .csv, .tsv, .json, .rst, .epub, .odt, .docbook
PDF → images
.pdf*, .png*, .jpeg*, .jpg*, .webp*, .avif*, .jxl*, .gif*, .bmp*, .tiff*, .tif*, .ico*, .jp2*, .psd*, .qoi*, .tga*, .ppm*, .pgm*, .pbm*, .pnm*, .pcx*, .dds*, .exr*, .hdr*
Formats marked * support import or export only.
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How to use this tool
- Choose files or drag them into the workspace. Matching inputs get the output format shown on this page.
- Check the output format and image quality for each file. Existing files in your queue keep their settings.
- Start the conversion, then download individual results or the completed batch. Your original files are unchanged.
Quality and format notes
This conversion decodes MP3 and re-encodes it as M4A. The result does not regain quality lost to MP3 encoding, but AAC often reaches similar audibility at smaller sizes, which helps when a library must stay compact.
If your source exists as a CD rip or lossless file, converting that source directly to M4A avoids a second lossy step. Keep originals when storage allows.
Frequently asked questions
Is M4A better than MP3?
At equal bitrates AAC usually sounds slightly better and it is the default on Apple platforms. MP3 remains more universal on old hardware, so the best choice depends on where you play your files.
Why doesn't conversion improve the sound?
Decoding MP3 yields exactly the audio it stored — no more. Re-encoding cannot add back detail the MP3 encoder discarded.
Do artist and artwork tags survive?
Some metadata may not carry over between containers. Convert one file and check its tags in your player before batch-converting a whole library.