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Bulk M4R to PNM Converter Online — Free HD Quality

Drag and drop your multiple M4R files into this free online M4R to PNM converter (.m4r to .pnm), and click the Convert button to bulk convert them to PNM format in HD quality. Use the quality slider to fine-tune your PNM 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 PNM — File Format Comparison

Feature M4R PNM
File Extension .m4r .pnm
MIME Type audio/mp4 image/x-portable-anymap
Compression Type 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 PNM Format?

Portable Anymap format, generic Netpbm format.

  • Compression: Lossless
  • Tags & Metadata: Supported

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