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File Converters TIFF and PDF apps Forensic Freeware1) Upload MKV file to convert
Drop files here, or Click to select
2) Set converting MKV to MP3 options
3) Get converted file
Total Movie Converter
Total Movie Converter is a handy solution to convert video files of almost all popular video codecs toAVI, MPG, WMV, MPEG, FLV. In addition, Total Movie Converter is great for converting video for iPad, iPhone, Apple TV, Archos, XBox and others thanks to the new Video To Device feature.
If you make home videos with a HD camera Total Movie Converter will make your videos suitable for the web in two clicks. Use this powerful video converter to rotate your videos or resize them. Total Movie Converter converts video from YouTube, Vimeo, and Sevenload. All you have to do is enter the url. The video converter can also change the codec or system type between all popular video formats. You can also adjust Audio\Video bitrate, Frame Rate, cut any piece of your movie or combine video.💾 Upload Your File: Go to the site, click on «Upload File,» and select your MKV file.
✍️ Set Conversion Options: Choose MP3 as the output format and adjust any additional options if needed.
Convert and Download: Click 👉«Download Converted File»👈 to get your MP3 file.
| File extension | .MKV |
| Category | Video File |
| Description | MKV is not a multimedia compression format, but rather a container format, which incorporates various types of multimedia. Mostly, such files contain audio, video, textual information (subtitles), etc. ñ elements, which may use completely different encoding patterns. MKVís biggest advantages are easy online sharing, low error rate, dissection of files into separate chapters, switchable subtitles, switchable audio- and video tracks, etc. Mostly, MKVs consist of open source elements, and they can be played in a vast number of players on nearly all existing platforms. |
| Associated programs | VLC Media Player |
| Developed by | Steve Lhomme |
| MIME type | video/x-matroska audio/x-matroska |
| Useful links | More detailed information on MKV files |
| Conversion type | MKV to MP3 |
| File extension | .MP3 |
| Category | Audio File |
| Description | MP3 is the most popular audio file type based on MPEG-1 Layer III compression. Its lossy algorithm was developed in 1991. MP3 codes the sound almost with the same quality, as CD (16-bit stereo), providing compression in size 1 to 10 from the original WAF or AIFF tracks. The quality of MP3 seriously depends on the bitrate. It can be 128 - 256 kbps. Higher bitrates are also supported, but they seriously increase the file size. It is supported by all modern hard- and software players. |
| Associated programs | RealOne WinAmp Windows Media Player iTunes |
| Developed by | Fraunhofer Institute |
| MIME type | audio/mpeg audio/MPA audio/mpa-robust |
| Useful links | More detailed information on MP3 files |
MKV (Matroska Video) is an open container that can hold video, multiple audio tracks, subtitles, and chapter markers. To use the audio independently — in a music player, podcast app, or audio editor — you need the audio track extracted and saved as a standard MP3 file. Drop your .mkv into the converter above and the audio is ready in seconds.
The Matroska container was designed for flexibility: it can store video in H.264, H.265/HEVC, VP9, or AV1; audio in AAC, MP3, Vorbis, FLAC, DTS, or AC3; and subtitles in ASS, SSA, or SRT format — all in one file. This flexibility makes MKV the default format for high-definition movies, anime series, foreign-language films, and online lecture recordings.
The problem: MKV is not natively supported by Apple iTunes, iPod/iPhone offline players, many Bluetooth speakers, in-car audio systems, or podcast platforms. Extracting the audio track as MP3 removes the video overhead and produces a compact, universally compatible file.
| Property | MKV | MP3 |
|---|---|---|
| Type | Video container | Audio format |
| Audio codecs | AAC, MP3, Vorbis, FLAC, DTS, AC3, OPUS | MPEG-1/2 Layer III only |
| Video | Yes (H.264, H.265, VP9, AV1) | No |
| Subtitles | Yes (SRT, ASS, SSA) | No |
| Compression | Depends on codecs used | Lossy (MPEG Layer 3) |
| Typical file size (1 hour) | 1–10 GB (with video) | 50–140 MB (audio only) |
| Mobile/player support | Limited (requires codec packs) | Universal |
| Streaming platforms | Not widely accepted | Accepted everywhere |
If the audio track inside your MKV is already MP3-encoded, the converter extracts it directly without re-encoding — the bit-for-bit original is saved as a .mp3 file. If the audio is AAC, Vorbis, or another codec, it is decoded and re-encoded to MP3 at your chosen bitrate:
For truly lossless extraction, convert the MKV audio to WAV or FLAC using the desktop Total Video Converter instead.
Many MKV files — especially anime and foreign films — contain two or more audio tracks (e.g., original Japanese + English dub). The online converter extracts the first (primary) audio track by default. If you need to select a specific track, use the desktop Total Video Converter, which displays all available tracks and lets you choose which one to extract before conversion.
| Feature | Online Converter | Total Video Converter |
|---|---|---|
| File size limit | 50 MB | Unlimited |
| Batch conversion | One file at a time | Thousands of files |
| Audio track selection | First track only | Any track |
| Output bitrate control | 128 / 192 / 320 kbps | Custom, 32–320 kbps |
| Command-line / automation | No | Yes |
| Privacy (files leave your computer) | Uploaded to server | Processed locally |
| Cost | Free | From $29.90 |
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