WMA to IMA Converter

Encode WMA audio as IMA ADPCM data for embedding

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Embedded Standard

IMA ADPCM is used in embedded systems and games — produce from WMA.

Compact Output

IMA achieves 4:1 compression — small files for resource-limited systems.

Online Encoding

No embedded SDK needed — convert WMA to IMA in your browser.

How to convert WMA to IMA

Select files from Computer, Google Drive, Dropbox, URL or by dragging it on the page.

Choose ima or any other format you need as a result (more than 200 formats supported)

Let the file convert and you can download your ima file right afterwards

About formats

WMA (Windows Media Audio) is a family of proprietary audio codecs developed by Microsoft and first released in 1999 as part of the Windows Media framework. Created to compete with MP3 and AAC, WMA Standard uses perceptual coding to deliver what Microsoft claimed was near-CD quality at bitrates as low as 64 kbps — roughly half the data rate MP3 typically needed for comparable results. The codec family grew to include WMA Professional for surround sound and high-resolution audio, WMA Lossless for bit-perfect archival compression, and WMA Voice optimized for spoken content at very low bitrates. Deep integration with Windows, Windows Media Player, and the Zune ecosystem gave WMA a strong distribution advantage throughout the 2000s, and digital rights management (DRM) support made it attractive to online music stores of that era. Encoding and decoding are handled natively by Windows, requiring no third-party software for playback on any Windows machine. Cross-platform support has improved through libraries like FFmpeg and GStreamer, though WMA remains less universally compatible than MP3 or AAC on non-Microsoft devices. The format still appears in legacy media libraries, though newer codecs have largely taken its place for streaming and portable use.

Developer: Microsoft Corporation

Initial release: 1999

IMA ADPCM (Adaptive Differential Pulse-Code Modulation) is a compact audio coding standard published by the Interactive Multimedia Association in 1992, addressing the need for a lightweight, royalty-free compression scheme suitable for early multimedia PCs and embedded devices. The algorithm encodes each sample as a 4-bit nibble representing the quantized difference from the previous sample, while an adaptive step-size table adjusts dynamically to track signal amplitude — delivering a fixed 4:1 compression ratio over 16-bit PCM. Decoding requires only an integer multiply-add per sample and a small lookup table, so even modest 1990s CPUs could decompress in real time without dedicated DSP. The format became deeply embedded in the multimedia landscape: Microsoft adopted it as a standard ACM codec for WAV files, game engines relied on it for sound effects, and telephony equipment used it for voice storage. Its advantages are enduring: predictable 4:1 size reduction simplifies buffer allocation in constrained environments, the decode path runs on 8-bit microcontrollers, and the open specification made IMA ADPCM one of the most broadly implemented audio codecs in computing history.

Developer: Interactive Multimedia Association

Initial release: 1992

Frequently Asked Questions

Why convert WMA to IMA?

IMA ADPCM is standard in embedded audio and games. WMA cannot be decoded by embedded hardware — IMA provides compatibility.

What uses IMA?

Embedded processors, game engines, multimedia frameworks, and telephony devices consume IMA ADPCM.

Is IMA headerless?

Yes — IMA ADPCM is raw data. The system must know sample rate and channels.

Is IMA smaller than WMA?

IMA provides 4:1 compression with simpler decoding — ideal for hardware decoders.

Can I batch convert?

Upload multiple WMA files and encode them all to IMA at once.

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Specific converters

MP3 to IMA

WAV to IMA

MP4 to IMA

M4A to IMA

OGG to IMA

WMA to IMA

AAC to IMA

AVI to IMA

VOX to IMA

AMR to IMA

WEBM to IMA

AIFF to IMA

WMV to IMA

WVE to IMA

FLAC to IMA

MKV to IMA

AU to IMA

OPUS to IMA

3G2 to IMA

3GP to IMA

AAF to IMA

ASF to IMA

AV1 to IMA

AVCHD to IMA

CAVS to IMA

DIVX to IMA

DV to IMA

F4V to IMA

FLV to IMA

HEVC to IMA

WMA to IMA Quality Rating

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