Inspect every entry's headers — version, OS, last modified, compression method, encryption flags, extra fields. Forensic-grade ZIP intelligence, zero upload.
Per-job file size, entry count, and batch caps for Metadata Extractor. Limits apply to every Archive tool in JAD Apps; upgrade for larger uploads and bigger batches.
| Tier | Max archive size | Max entries / archive | Max files per batch |
|---|---|---|---|
| Free | 47.7 MB | 500 | 1 |
| Pro | 476.8 MB | 50,000 | 20 |
| Developer | 1.86 GB | 50,000 | 20 |
Drop your ZIP archive
We walk the central directory and pull every metadata field per entry
Download a JSON report with version, OS, timestamps, compression, encryption, and extra fields
0 bytes uploaded. Archive Metadata Extractor runs entirely in your browser using fflate, zip.js, and libarchive WASM. Your archive files never leave your device.
It tells you the system that created the archive (DOS, Unix, macOS, Windows NTFS). Unix-created ZIPs may carry mode bits in extra field 0x7875; NTFS-created ones may have 64-bit timestamps in 0x000a.
A 16-bit flag per entry: bit 0 = encrypted, bit 3 = data descriptor follows, bit 11 = filename is UTF-8, others are method-specific. The full flag breakdown is in the report.
Yes — entries that fail to parse are reported with their byte offset and the parse error. The Corrupted ZIP Repair tool can attempt recovery once you know the damage extent.
See every file inside a ZIP, 7Z, RAR, or TAR before extracting. Tree view, sortable table, byte-accurate sizes — runs entirely in your browser, zero upload.
Open toolDetect whether a ZIP uses legacy ZipCrypto, AES-128, AES-192, or AES-256 encryption. Critical before sharing — ZipCrypto is broken and should be re-encrypted.
Open toolDrop any file and reveal its true archive format. Detects ZIP, GZ, TAR, BZ2, XZ, 7Z, RAR by magic bytes — extension-independent. Browser-native, zero upload.
Open tool