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Bulk M4R to AVIF Converter Online — Free HD Quality

Drag and drop your multiple M4R files into this free online M4R to AVIF converter (.m4r to .avif), and click the Convert button to bulk convert them to AVIF format in HD quality. Use the quality slider to fine-tune your AVIF output, then download your converted files one by one or as a single ZIP — your original M4R files are removed from our servers right after.

To:
85%

Drop images here or click to browse

PNG, JPG, WebP, GIF, HEIC, RAW, PSD, SVG and more

Max 100MB per file

M4R vs AVIF — File Format Comparison

Feature M4R AVIF
File Extension .m4r .avif
MIME Type audio/mp4 image/avif
Compression Type Lossy Lossy & Lossless
Metadata Support Yes Yes

What Is M4R Format?

iPhone Ringtone — AAC audio in an MP4 container under 40 seconds, the format iTunes and iPhone use for custom ringtones; identical to M4A in encoding but recognised by iOS as a ringtone file.

  • Compression: Lossy
  • Tags & Metadata: Supported

What Is AVIF Format?

AV1 Image File Format with superior compression for modern browsers.

  • Compression: Lossy & Lossless
  • Tags & Metadata: Supported

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