ZIP Tools は何をしますか？
ZIP Tools はブラウザ上でデータやファイルを変換するツールで、結果と制限を明確に示します。 検証済みの機能： Local multi-file ZIP creation, Archive listing before extraction, Selective file extraction, Size caps and CRC validation.
When should you use this tool?
Use this tool for small local file bundles and selective extraction. Use desktop archiving software for large, encrypted, multi-volume, or ZIP64 archives. It does not write extracted paths directly to your filesystem.
使い方
- Choose Create ZIP and select local files, or choose Inspect ZIP and select exactly one archive.
- Select Run. In inspection mode, review entry names and sizes, select files, then choose Extract selected files.
- Download the generated ZIP or each selected extracted file. Clear the workspace when finished.
実際の入出力例
Archive two local text files
入力
hello.txt: Hello
empty.txt: (empty file)出力
ZIP entries:
hello.txt — 5 bytes
empty.txt — 0 bytesAn empty file is a valid archive entry. Inspection lists sizes without inflating file contents; extraction processes selected entries only.
一般的なエラーと対処
| 症状 | 原因 | 対処 |
|---|---|---|
| The archive is rejected before extraction. | The file uses encryption, ZIP64, a split archive, unsupported compression, invalid headers, duplicate paths, or too many entries. | Export a standard single-volume ZIP using Store or Deflate; keep it within the displayed limits. |
| Extraction fails with a size or integrity error. | Declared expansion exceeds 100 MiB, actual output exceeds the validated size, or a selected entry fails CRC validation. | Use a smaller intact archive and compare it with the source; corrupted data is not offered for download. |
Supported behavior and limitations
このツール固有の制限： Supports standard Store and Deflate ZIP entries. Encrypted, ZIP64, split archives and parent-traversal paths are rejected. Legacy non-UTF-8 filenames may display differently; prefer UTF-8 names. Downloads use the final filename, so folder hierarchy is shown in the list but not recreated on disk. Same-named input files must be renamed before packing.
標準と実装の参考資料
- fflate (opens in a new tab)Pure JavaScript ZIP compression and streaming extraction.
- ZIP format specification (opens in a new tab)Defines ZIP headers, central-directory metadata, and CRC fields.
ZIP Tools — FAQ
Is my input uploaded?
No. Processing happens in a browser Worker. Engine files load from this website; tool input, output, and filenames are not sent to a processing API.
Do I need an account or API key?
No account, API key, or backend processing service is needed.
How do I save a result?
Review the result, then use the Copy or Download control available for that output. Modifying input clears stale results.
What are the limits?
Supports standard Store and Deflate ZIP entries. Encrypted, ZIP64, split archives and parent-traversal paths are rejected. Legacy non-UTF-8 filenames may display differently; prefer UTF-8 names. Downloads use the final filename, so folder hierarchy is shown in the list but not recreated on disk. Same-named input files must be renamed before packing.
更新内容
実質的な更新： ZIP Tools: Added local processing, explicit size limits, cancellation, worked examples, error explanations, and downloadable results.