Convert WAV to MKV

You choose it, because audio alone has no picture. The default is a static waveform render, and you can supply a still image instead — cover art, a title card, a photo — which is held for the whole duration. That is what makes the file uploadable to video-only platforms that will not accept a bare audio track. WAV is Microsoft and IBM’s RIFF-based audio container from 1991, and it is what almost every audio interface and DAW writes on record. MKV is the archival container of choice because it stores unlimited audio tracks, soft subtitles, chapter markers and cover art in one file.

Only if it has to be. Where the MKV container accepts the source audio codec directly, the stream is copied in untouched and stays bit-identical. Where it does not, the audio is transcoded once to whatever MKV does accept, at a bitrate matched to the source so the second pass costs as little as possible. WAV normally stores raw uncompressed PCM — every sample kept exactly, at whatever bit depth and sample rate was captured. MKV is codec-agnostic: H.264, HEVC, VP9 and AV1 video sit happily beside AAC, FLAC, Opus, DTS or Dolby audio in the same file.

It usually does, because video containers expect a compressed audio track and most players will not accept raw PCM inside one. The audio is encoded once, at a high bitrate so the loss is inaudible, and the lossless WAV stays untouched on your side. Keep it: it remains the master, and the MKV is a delivery copy. WAV is the correct format for editing, mastering and archiving, because it can be re-encoded any number of times without accumulating artefacts.

Barely larger, if you use the default still image. A single held frame compresses to almost nothing across the whole duration because every frame is identical to the last, so the file is dominated by the audio track. Choosing an animated waveform instead adds real video data and can double or triple the result.

Yes — MKV carries multichannel audio properly, so a 5.1 mix stays 5.1 with the channel layout intact rather than being folded to stereo. That matters if the file is destined for a home cinema receiver rather than a phone, which will downmix at playback time anyway.

Yes — basic WAV → MKV conversion is free with no registration. Premium adds higher per-file size limits, more parallel batch workers, and removes ads.

Free accounts: up to 100 MB per WAV file. Premium: typically 1 GB per file, depending on the WAV source type. Very large files are split into chunks server-side when the MKV format allows.

Conversion preserves all information that both WAV and MKV can represent. Format-specific features that the MKV format doesn't support (e.g. vector data in raster output, formulas in plain-text output) are rasterized or stripped — see the format-specific notes on the result page.

Yes — drop multiple WAV files into the upload zone and they are queued in parallel. Premium has more parallel workers; on a 50-file batch this is the difference between minutes and seconds.

Yes — the UI is responsive and the conversion pipeline runs server-side, so mobile devices upload-then-download just like desktops. iOS and Android browser file pickers (camera roll, Files app) work end-to-end.

Chrome, Firefox, Safari (15+), Edge, and Opera. The converter uses standard `<input type="file">` upload — no WebAssembly or PWA dependencies — so even older browsers work.