RAW DISK IMAGE / FLOPPY EXPLORER

See what’s on the disk.

Open a floppy image to inspect its boot record, allocation table, directory and raw sectors — visually, without mounting it.

Drop a disk image or a whole folder anywhere on this page Analysis runs entirely in your browser and is read-only — nothing is uploaded or modified. Open a folder to browse every image in it and pick the one to inspect. KryoFlux …NN.S.raw track files are grouped per disk (same folder and same name prefix).

Supported formats

PC & generic: FAT12/16/32 (PC, Atari ST, MSX-DOS), TR-DOS
Apple: Macintosh MFS/HFS, Apple II DOS 3.3 / ProDOS, Apple Lisa PREBOOT
Unix: SunOS Bar/Tar, NeXT UFS1, SCO UNIX System V (S5)
Commodore, Atari, Amiga, Acorn: D64/D71/D81, Atari 8-bit DOS 2, Amiga OFS/FFS, BBC DFS
DEC, Sharp, Amstrad & VTech: DEC Files-11 ODS-1 (RSX-11), Sharp MZ Disk BASIC, Sharp MZ-800 Personal CP/M-80 (320 KB and 400 KB variants), Sharp MZF/MZT tape files, Amstrad CPC / Extended CPC DSK, VTech Laser 200/210/310 & Dick Smith VZ200/VZ300 DOS (.dsk / .dvz emulator images)
Flux & bitstream: SCP, KryoFlux .raw, HFE, WOZ, NIB, G64, IMD — including Macintosh 400K/800K GCR — decoded to sectors with a copy-protection and read-error scan (time-reversed flux from flipped disks, e.g. Apple II side B via gw read --reverse, is detected automatically)

Disk layout

Each square is one logical sector. Select a sector to inspect its bytes.

100% LinkRAW IMAGE

Empty Low Entropy Med Entropy High Entropy Text String Filler (0xF6) Selected file Bad sector / FAT bad cluster

Cylinder geometryClick a file name to highlight its allocated sectors.Click a sector

Disk geometry

Translate a logical sector into cylinder · head · sector coordinates.

CHS

TRACK MAP · CYLINDER —HEAD — · SECTOR —

Select a sector segment to inspect its LBA in the sector viewer.

Sector inspector

Select a sector above or enter an LBA to inspect raw hex values.

LBA

Boot sector & allocation

Decoded from the volume boot record, then checked against image length.

BIOS Parameter Block

Offset	Field	Decoded value

Allocation map

Region	Start LBA	Sectors	Size

Boot-code inspector

Annotated view of the first 512 bytes, extracted printable strings, and the boot signature.

BOOT SECTOR

Annotated boot-sector bytes

Offset	Bytes	ASCII	Region

Jump / OEMBPB fieldsBoot codeSignature

Readable strings

Printable ASCII runs of at least four characters found in the boot sector.

Signature details

Filesystem explorer

Navigate directories, preview text, images (including PCX, TGA, TIFF, IFF and icons), PDF and archives (ZIP, TAR, GZ, ARC, LZH, StuffIt), inspect audio/executables, or extract files.

File preview & visualizer

No file selected

Select a file entry to preview text, images, PDF, archives, executable headers, or retro audio formats.

File content is reconstructed from its FAT cluster chain in memory. The source image remains unchanged.

0:00 / 0:00

Cluster-chain explorer

Choose a directory entry to inspect its FAT chain. Select a row to highlight that cluster and inspect its first sector.

No file selected

FAT links are shown alongside byte counts read directly from the selected cluster’s raw image bytes.

Step	Cluster	Data T/H/S range	FAT link	Raw non-zero bytes
Select a file or directory above to explore its cluster chain.

FloppoScope parses raw sector images in your browser. It does not modify the image. FAT (including Atari ST and MSX-DOS disks), SunOS Bar/Tar archives, NeXT UFS1, SCO UNIX System V (S5), classic Macintosh MFS/HFS, Apple Lisa PREBOOT boot-file volumes, Commodore CBM DOS, Atari DOS 2, AmigaDOS, Apple DOS 3.3/ProDOS, TR-DOS, Acorn DFS, DEC Files-11 ODS-1 (RSX-11), Sharp MZ Disk BASIC, Sharp MZ-800 Personal CP/M-80, Sharp MZF/MZT tape files and VTech Laser/VZ200 DOS are inspected read-only. MSA, ATR, XFD and 2IMG wrappers are unwrapped automatically. SCP, KryoFlux, HFE, WOZ (5.25-inch), NIB, G64 and IMD images are decoded to sectors when a supported sector format is found; IPF, DMS, TD0 and FDI are recognised but not decoded. Amstrad CPC / Extended CPC DSK containers are unwrapped to a flat sector image first (as used for Sharp MZ disks). VZ200 .dsk / .dvz disk-drive images (98,560 to 99,185 bytes, early and corrected layouts) are rebuilt into a flat 40 × 16 × 128-byte image by their sector sync marks, and text-mode damage (CR LF expansion, or every 0x0D byte deleted) is repaired where the checksums allow; sectors whose lost 0x0D bytes cannot be placed are flagged. Macintosh 400K/800K GCR track zones and 1.44MB HD MFM geometry are shown when a supported volume is detected.