What is a .CRAMFS file?
cramfs is a small compressed read-only filesystem for embedded Linux.
- Did you know
- cramfs was an early compressed filesystem for squeezing Linux onto tiny flash chips.
- cramfs was written by Linus Torvalds as a deliberately minimal read-only filesystem for cramming Linux onto small ROM chips.
- Files are zlib-compressed one page at a time so they can still be read at random, with each file capped under 16MB.
- What Analyser reads
- Inspect virtual-machine descriptors (VMware .vmx, VirtualBox .vbox, OVF/OVA), disc images (Nero .nrg, Alcohol .mds/.mdf, CloneCD), embedded firmware (Intel HEX, Motorola S-record, UF2, ELF/AXF, Device Tree Blobs, U-Boot uImage), partition tables (MBR/GPT with GUIDs), Linux filesystem superblocks (ext2/3/4, SquashFS, cramfs, romfs) and Windows imaging (WIM/ESD) - reading headers directly, no upload.
- Depth of analysis
- .CRAMFS is an identification-grade format: Analyser recognises it from its bytes and decodes the header metadata it carries, rather than opening it in a full viewer. Formats that do get a full viewer are marked "Full" on the formats page.
- Open a .CRAMFS file
- Drag a .CRAMFS file onto the Analyser home page (or tap to pick one). It is identified entirely in your browser - nothing is uploaded, there is no account, and it works offline once installed.