Bento4 is a C++ class library and tools designed to read and write ISO-MP4 files. This format is defined in international specifications ISO/IEC 14496-12, 14496-14 and 14496-15. The format is a derivative of the Apple Quicktime file format, so Bento4 can be used to read and write most Quicktime files as well. In addition to supporting ISO-MP4, Bento4 includes support for parsing and multiplexing H.264 and H.265 elementary streams, converting ISO-MP4 to MPEG2-TS, packaging HLS and MPEG-DASH, CMAF, content encryption, decryption, and much more.
Features
A number of formats and features based on the ISO-MP4 format and related technologies are also supported, including:
- MPEG DASH with fragmented MP4 files, as defined in the international specification ISO/IEC 23009-1
- HLS with TS or MP4 segments (dual DASH/HLS output), as defined in RFC 8216
- CMAF (Common Media Application Format) as defined in ISO/IEC 23000-19
- MPEG Common Encryption (CENC) as specified in the international specification ISO/IEC 23001-7
- PIFF (Protected Interoperable File Format), and encrypted, fragmented MP4 format specified by Microsoft and used for encrypted HTTP Smooth Streaming.
- Reading and writing 3GPP and iTunes-compatible metadata.
- ISMA Encrytion and Decryption as defined in the ISMA E&A specification
- OMA 2.0 and 2.1 DCF/PDCF Encryption and Decryption as defined in the OMA specifications.
- ISO-MP4 files profiled as part of the 3GPP family of standards.
- The UltraViolet (DECE) CFF (Common File Format).
- Parsing and multiplexing of H.264 (AVC) video and AAC audio elementary streams
- Support for multiple DRM systems that are compatible with MP4-formatted content (usually leveraging CENC Common Encryption), such as Marlin, PlayReady, Widevine, FairPlay and Adobe Access.
- Support for a wide range of codecs, including H.264 (AVC), H.265 (HEVC), AAC, HE-AAC, xHE-AAC, AC3 and eAC3 (Dolby Digital), AC4, Dolby Atmos, DTS, ALAC, and many more.
- Support for Dolby Vision and HDR.
The SDK is designed to be cross-platform. The code is very portable; it can be compiled with any sufficiently modern C++ compiler. The implementation does not rely on any external library. All the code necessary to compile the SDK and tools is included in the standard distribution. The standard distribution contains makefiles for unix-like operating systems, including Linux and Android, project files for Microsoft Visual Studio, and an XCode project for MacOS X and iOS. There is also support for building the library with the SCons build system as well as CMake.
Publisher’s description
What is Bento4?
Bento4 is a free program for Windows from Axiomatic Systems, LLC..
Installation and requirements
Official installers exist for 64-bit as Portable. The main installer is 6.9 MB. It runs without installation (portable).
Pros / Cons
Pros
- Free to use
- Portable: runs without installation
- Small download (6.9 MB)
Cons
- No native ARM64 build
- No update for more than a year
In short: Bento4 is a free Windows tool for 64-bit PCs. Updates have slowed down.
Is Bento4 safe to download?
- The file is served by bok.net; check that it is the publisher’s official mirror
- The download link uses HTTPS
- A SHA256 hash is published, so you can verify the file:
6916A390F75878872594BE74554B8B54AB220BB29812424441A8E1ECC9A6AC5E· Open the VirusTotal report for this hash - The link answered when we last checked it (October 22, 2026)
- ExeAtlas does not host, wrap or modify installers
Related guide: How to check a file’s SHA256 hash on Windows
Recent versions
All 1 versions ›| Version | Date | Size | Files |
|---|---|---|---|
| 1.6.0-641Latest | July 23, 2025 | 6.9 MB | 64-bit ZIP |
Install from the command line
Silent install ›winget install --id AxiomaticSystems.Bento4 -escoop install main/bento4Program files (.exe): aac2mp4.exe, mp42aac.exe, mp42avc.exe, mp42hevc.exe, mp42hls.exe, mp42ts.exe, mp4audioclip.exe, mp4compact.exe, mp4dcfpackager.exe, mp4decrypt.exe, mp4diff.exe, mp4dump.exe, mp4edit.exe, mp4encrypt.exe, mp4extract.exe, mp4fragment.exe
Related guide: How to use winget: install and update apps
Also for other systems
brew install bento4Information
- Publisher
- Axiomatic Systems, LLC.
- Licence
- Freeware
- Price
- Free
- Requires
- Windows 11 / 10
- Architecture
- 64-bit
- Installer
- Portable
- Version
- 1.6.0-641
- Released
- July 23, 2025
- Added to the catalogue
- July 23, 2025
- Versions listed
- 1
- Website
- bento4.com
- winget ID
- AxiomaticSystems.Bento4
- Scoop package
- main/bento4
Ratings and reviews
No reviews yet. Be the first to rate it.
Frequently asked questions
Is Bento4 free?
Yes. Bento4 is free to use.
Is Bento4 safe to download?
The download comes from bok.net; ExeAtlas does not host or change the file. Compare its SHA256 hash with the one shown here, or open the VirusTotal report for that hash.
How do I install Bento4 with winget?
Open PowerShell or Windows Terminal and run the winget command shown on this page. winget downloads the official installer and checks its SHA256 hash before running it.
Does Bento4 run on ARM (Windows on Arm)?
There is no ARM64 build; Windows 11 on Arm can run the 64-bit version through emulation.
Can I use Bento4 without administrator rights?
Yes, it is portable: unpack and run it.