Cracked Bunker is a set of free, browser-based tools for figuring out what's wrong with a damaged, unknown, or misidentified file — and recovering as much of it as honestly possible.
Most "file repair" tools online either don't work, silently corrupt what little is left, or fabricate a confidence score to look more capable than they are. Cracked Bunker's rule is simple: never claim more than the evidence supports. Every diagnosis is backed by a real structural check — a real CRC-32 verification, a real JSON/XML parse, a real decompression attempt — not a guess dressed up as one. When something can't be recovered, the tools say so plainly instead of inventing an answer.
Every tool on this site runs entirely inside your browser. Nothing you drop into Cracked Bunker is ever uploaded, transmitted, or stored anywhere — there's no server in the loop to send it to. Close the tab and it's gone, exactly as if you'd never opened it. This is true for all twenty-five tools today, without exception.
You don't have to trust this claim — you can verify it. Open your browser's DevTools (F12), switch to the Network tab, and drop a file into any tool here. You'll see it read locally and nothing leave your machine: no request carrying your file data, because there's nowhere here for it to go. That's the whole security model — not a promise, something you can watch happen.
Twenty-five tools, covering identification, structural validation, repair, metadata recovery, file carving, and low-level structural inspection for JPEG, PNG, GIF, BMP, WebP, ZIP-family archives, JSON, XML, CSV, SQLite, RIFF containers, PDF, raw disk images (MBR/GPT/NTFS), video (MP4/MOV/AVI/MKV/WebM), audio (WAV/MP3), log files (JSON Lines, syslog, Apache/Nginx), config files (YAML, TOML, .env, INI), X.509 certificates and keys (PEM/DER), Office documents (DOCX/XLSX/PPTX/ODT), Windows/Linux/macOS executables (PE/ELF/Mach-O), GZIP/TAR/7-Zip/RAR/XZ/BZIP2 archives, and a database of roughly 120 file-format signatures. There's also Crack the Bunker, a set of practice challenges built on those same tools — its rank, XP, and solved-challenge history are stored the same way everything else here is: locally in your browser, not on a server. More formats and tools get added as they're actually built and tested — not announced ahead of being real.