ZIP Merger

Merge ZIP archives locally, optionally prefixing entries by source archive to avoid collisions.

ZIP archives

Duplicate handling

Output filename

—Archives

—Input files

—Input bytes

—Output bytes

Choose two or more ZIP filesAll parsing and ZIP generation happen in this tab. Password-protected or unsupported ZIP methods may fail in JSZip.

Archive preflight before merge

Inspect selected ZIPs for duplicate output paths, case-insensitive collisions and suspicious traversal paths before creating the combined archive.

0Input entries

0Exact path collisions

0Case-insensitive collisions

0Suspicious paths

Source	Entry	Finding

Preflight is local and does not extract files to the filesystem. Password-protected or unsupported compression methods can still prevent parsing.

File handling notes

connects ZIP creation/extraction, archive inspection, GZIP, TAR/TAR.GZ extraction, ZIP merging, multi-ZIP extraction, splitting/joining, duplicate detection, renaming, folder summaries, file inventories, and file-type inspection without requiring a file upload where the browser APIs support the task.

Archive and safety boundaries

Browser memory can limit very large files. TAR extraction supports ordinary TAR/USTAR regular files and directories rather than every PAX/sparse/link edge case. Password-protected or uncommon ZIP compression methods can exceed JSZip support. Normalized download paths do not grant arbitrary filesystem write access.