What is the BIN file format?
Files with the .bin extension contain images of data carriers - typically CDs, DVDs, or Blu-ray discs - stored using a binary method. It is usually an exact copy of all the raw data on the disc. In the BIN/CUE format, the .bin file holds the raw disc data while a companion .CUE sheet describes the track layout and data modes.
BIN files may include:
- Files,
- Directories,
- Boot files,
- Volumes and their attributes,
- Other data, specific to a given data carrier - metadata
Data stored within a BIN image are copied by dedicated software, sector by sector. BIN files are most commonly associated with CD, DVD, and Blu-ray images. Unlike plain ISO images - which store 2048-byte data sectors - a raw .bin image preserves the full 2352-byte raw sectors, retaining subchannel data, CD-audio, and mixed-mode tracks that a standard ISO cannot represent. Their format enables them to be mounted as virtual discs using proper software. A BIN image can also be converted to an ISO, allowing individual files and folders to be extracted; tools such as IsoBuster or bchunk handle this - for example, bchunk image.bin image.cue out splits the pair into individual track files.
PS1 and Sega Saturn game dumps are frequently distributed as BIN/CUE pairs and load directly in emulators such as DuckStation or RetroArch by opening the .cue file; the companion sheet is essential for the emulator to correctly interpret track boundaries and any audio streams. Software utilizing BIN files includes programs designed for recording discs, mounting virtual drives, and archiving optical media.
Note that .bin is also used for firmware images and ROM dumps - unrelated file types that share only the extension name.
Security & safety
RISK: MEDIUMA disc-image BIN is data, not code - mounting it is safe in itself. The real risk is what's inside: BIN/CUE images from warez or ROM sites can contain infected installers or cracks, so scan the mounted contents before running anything. Because the .bin extension hides the content, also confirm a downloaded file is actually a disc image (and not a renamed executable) before trusting it. Burning or mounting an image you trust is harmless.
Format details
in a nutshell- Device firmware image - Routers, TVs, cameras, drones, 3D printers and BIOS updates ship as .bin blobs that must be loaded only through the device's own updater.
- Game ROM dump - Sega Genesis/Mega Drive, Atari 2600 and similar cartridge dumps use .bin and open directly in an emulator.
- Generic program data / Unix installer - Many apps dump caches, saves or resources as .bin; some Unix self-extracting installers run with 'sh file.bin'.
Programs that open BIN files
Windows6 apps
IsoBuster
Freemium File → Open Image File → browse to the .bin/.cue; extracts files even from damaged images. 
PowerISO
Paid Open the .cue (or .bin) directly, or Tools → Mount to a virtual drive; also converts BIN to ISO. 
DAEMON Tools Lite
Freemium Quick Mount → select the .cue file (not the .bin) to get correct track layout.
AnyBurn
Free Convert image file format → BIN/CUE to ISO, or burn the image to disc; free PowerISO sibling.
WinCDEmu
Open-source After install, double-click the .cue/.bin to mount it as a virtual drive letter. 
macOS2 apps
bchunk (Homebrew)
Open-source brew install bchunk, then: bchunk file.bin file.cue out - produces a mountable ISO. 
Linux1 app
bchunk
Open-source bchunk image.bin image.cue output - converts BIN/CUE to ISO, then mount the ISO normally. Technical details
deep spec| Encoding | Raw binary; sectors copied byte-for-byte from the disc surface |
| Byte order | Audio PCM data stored big-endian (Red Book); data-sector header fields little-endian per ECMA-130 |
| Sector size | 2352 bytes per raw CD sector (sync + header + user data + EDC/ECC) |
| Raw mode | Full raw sector dump - 12-byte sync, 4-byte header, up to 2048 B user data, and 288 B EDC/ECC preserved per sector |
| Filesystem inside | ISO 9660 or UDF on data tracks; no filesystem on Red Book audio tracks |
| Companion file | Plain-text .cue sheet listing tracks, pregap lengths, data modes, and the .bin filename |
| Compression | None - raw uncompressed sector data |
| Encryption | None - plain sector dump with no built-in scrambling |
| Error-correction data | EDC/ECC fields preserved raw within each 2352-byte sector per ECMA-130 |
| Mixed-mode audio | Supported - CD-audio (CDDA) and data tracks can coexist in a single .bin file |
| Disc types | CD-ROM, CD-Audio (Red Book), CD-ROM XA, Mixed-Mode CD, Video CD; limited DVD support |
| Typical file size | 650-800 MB for a standard CD; multi-session or DVD images may exceed 4 GB |
| MIME type | application/octet-stream |
| Magic bytes | 00 FF FF FF FF FF FF FF FF FF FF 00 at byte 0 of each Mode 1/2 data sector; audio-only tracks have no fixed signature |
| Released | BIN/CUE disc images popularized by CDRWIN, mid-1990s |
| Open standard | Yes · royalty-free |
BIN conversions
Community Q&A
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