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BOX4 is a MKV/MP4/MOV to MKV/MP4 re-packager/remuxer/converter. It is an update to the old rebox.NET which needed refreshing simply because it was a little limited and concentrated too much on outputting to consoles. BOX4 now outputs to both MKV and MP4 using MP3 and AAC audio codec options. It also uses the audio filter ‘Dynamic Audio Normalizer’ which simply, is amazing. Requires .NET Framework.
Freeware
OS:
File size: 15.9MB
Portable version
Old versions
Version history
Alternative software
OS:
File size: 15.9MB
Portable version
Old versions
Version history
Alternative software
Screenshots
Latest version
Download
Download BOX4 3 64-bit 16MB Win64
Download Portable and other versions
Portable 
Download old versions
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Supported operating systems
Version history / Release notes / Changelog / What's New
BOX4 V3 (FINAL)
(Changes since last beta 4)
• Allow folders, as well as files, to be 'drag and dropped' for input.
• By default, auto select (enable) subtitle track if its 'Forced' flag is set.
• Tidied up a couple of minor '.Opacity Fade' issues.
• Cleaned up the final bits of code.
(Changes since last beta 4)
• Allow folders, as well as files, to be 'drag and dropped' for input.
• By default, auto select (enable) subtitle track if its 'Forced' flag is set.
• Tidied up a couple of minor '.Opacity Fade' issues.
• Cleaned up the final bits of code.
View full changelog
All features
[INPUT]
CONTAINER: MKV|WEBM|MP4|MOV|FLV|MXF
VIDEO: AVC H.264|HEVC H.265|VP9|VC-1
AUDIO: PCM_S24LE|PCM_S16LE|PCM_DVD|FLAC|VORBIS|TRUEHD|DTS |DCA|EAC3|AC3|AAC|AAC_LATM|MP3|MP2
SUBTITLE: SRT|SUBRIP|SSA|ASS|MOV_TEXT|VTT|HDMV_PGS_SUBTITLE|DVD_SUBTITLE|D VB_SUBTITLE
[OUTPUT]
CONTAINER: MKV|MP4
VIDEO: *SAME AS INPUT*
AUDIO: AC3|AAC|MP3|COPY
FILTER: LOUDNORM & DYNAUDNORM (Audio Normalisers)
SUBTITLE: Both TEXT and BITMAP formats (TEXT in MP4 are Apple compatible)
*NOT ALL THE ABOVE OPTIONS ARE AVAILABLE FOR MP4 OUTPUT FILES*
BOX4 (x64 .NET Framework v4.7.1)
Programmed/tested with Microsoft Windows 10 only.
(may work on Windows 7 onwards)
CONTAINER: MKV|WEBM|MP4|MOV|FLV|MXF
VIDEO: AVC H.264|HEVC H.265|VP9|VC-1
AUDIO: PCM_S24LE|PCM_S16LE|PCM_DVD|FLAC|VORBIS|TRUEHD|DTS |DCA|EAC3|AC3|AAC|AAC_LATM|MP3|MP2
SUBTITLE: SRT|SUBRIP|SSA|ASS|MOV_TEXT|VTT|HDMV_PGS_SUBTITLE|DVD_SUBTITLE|D VB_SUBTITLE
[OUTPUT]
CONTAINER: MKV|MP4
VIDEO: *SAME AS INPUT*
AUDIO: AC3|AAC|MP3|COPY
FILTER: LOUDNORM & DYNAUDNORM (Audio Normalisers)
SUBTITLE: Both TEXT and BITMAP formats (TEXT in MP4 are Apple compatible)
*NOT ALL THE ABOVE OPTIONS ARE AVAILABLE FOR MP4 OUTPUT FILES*
BOX4 (x64 .NET Framework v4.7.1)
Programmed/tested with Microsoft Windows 10 only.
(may work on Windows 7 onwards)
Sections/Browse similar tools
Alternative to BOX4
(Latest version updated)rebox.NET (May 13, 2015)
Guides and How to's
Notify me when software updated or report software
| 42 reviews, Showing 1 to 5 reviews |
Rating by typestar on
Apr 26, 2025 Version: BOX4 V3 (FINAL)
OS: Windows 10 64-bit Ease of use: 10/10
Functionality: 10/10
Value for money: 10/10
Overall: 10/10
Rating by as on
Nov 4, 2024 Version: 3
OS: Windows 7 64-bit Ease of use: 10/10
Functionality: 10/10
Value for money: 10/10
Overall: 10/10
The idea is great! Use it prior tagging, because some tags are not taken over to the new files.
Tags like LANGUAGE and MEDIATYPE are gone with the new files generated by BOX4 3.0.0.0
Where MEDIATYPE not so elemental but LANGUAGE is very important when filtering for a specific language. Would be nice to have it fixed for every tag from source files to be taken over properly.
Tags like LANGUAGE and MEDIATYPE are gone with the new files generated by BOX4 3.0.0.0
Where MEDIATYPE not so elemental but LANGUAGE is very important when filtering for a specific language. Would be nice to have it fixed for every tag from source files to be taken over properly.
Review by Macaroni on
May 1, 2023 Version: 3.0.0.0
OS: Windows 11 64-bit Ease of use: 10/10
Functionality: 9/10
Value for money: 10/10
Overall: 9/10
Rating by Martin on
Jan 18, 2023 Version: 2.513
OS: Windows 10 Ease of use: 10/10
Functionality: 10/10
Value for money: 10/10
Overall: 10/10
Rating by ScytheX64 on
Nov 23, 2021 Version: 3
OS: Windows 10 64-bit Ease of use: 10/10
Functionality: 10/10
Value for money: 10/10
Overall: 10/10
| 42 reviews, Showing 1 to 5 reviews |
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Win = Windows download version. It works on 32-bit and 64-bit Windows.
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Version history available = Complete changelog on our site.
= Windows version available. = Mac OS version available. = Linux version available.Our hosted software are virus and malware scanned with several antivirus programs using www.virustotal.com. (NOTE! Just one virustotal warning is 99.9% a false positive. And some software might receive 2-6 warnings but it's if they are not all same virus/trojan then it's 99% false positives.)
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