AMR – Adaptive Multi-Rate audio
AMR is a speech codec used for voice recordings and voicemail on mobile phones. Files are very small and tuned for speech, not music.
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Audio
- MP3 to AMR soon
- WAV to AMR soon
- AAC to AMR soon
- FLAC to AMR soon
- OGG to AMR soon
- M4A to AMR soon
- WMA to AMR soon
- AIFF to AMR soon
- OPUS to AMR soon
- AC3 to AMR soon
- ALAC to AMR soon
- AIFC to AMR soon
- AU to AMR soon
- CAF to AMR soon
- M4B to AMR soon
- OGA to AMR soon
- VOC to AMR soon
- WEBA to AMR soon
- APE to AMR soon
- DSS to AMR soon
- SHN to AMR soon
Video
- MP4 to AMR soon
- MOV to AMR soon
- AVI to AMR soon
- MKV to AMR soon
- WEBM to AMR soon
- FLV to AMR soon
- WMV to AMR soon
- MPEG to AMR soon
- MPG to AMR soon
- M4V to AMR soon
- 3GP to AMR soon
- OGV to AMR soon
- TS to AMR soon
- MTS to AMR soon
- M2TS to AMR soon
- VOB to AMR soon
- MXF to AMR soon
- 3G2 to AMR soon
- 3GPP to AMR soon
- CAVS to AMR soon
- DV to AMR soon
- DVR to AMR soon
- MOD to AMR soon
- RM to AMR soon
- RMVB to AMR soon
- SWF to AMR soon
- WTV to AMR soon
Frequently asked questions
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2,420 conversions (archive, audio, document, ebook, font, image, pdf, presentation, spreadsheet, vector and video) work on this server right now. The rest of the 3,451 conversions in the menus are on the roadmap and are clearly marked “coming soon” until they work.
How this works: your file is uploaded over HTTPS and converted on this server with open-source engines (libvips for images, FFmpeg for audio and video, LibreOffice and Pandoc for documents, Calibre for ebooks, Ghostscript and Inkscape for PDF and vector files). Images are processed in memory; other files use a private temporary folder that is deleted as soon as the conversion finishes.