Zip Converter

About This Tool

Zip Converter provides analytic capabilities for ZIP archives without disassembly. It accepts a ZIP file as input and outputs an estimated post-compression size when applying a chosen target format or compression level. This tool is intended for developers, QA engineers, IT admins, and file managers who routinely package software releases, perform backups, or curate large archives and need rapid, non-destructive estimates. By avoiding full extraction, it preserves data integrity while delivering actionable insight about potential size reductions and metadata implications. The workflow is designed to be deterministic: given the same input and parameters, the same estimates are produced, enabling reproducible planning across teams.\n\nUnder the hood, the tool uses a model of ZIP variants and the common Deflate-based compression behavior. It reads archive headers and central directory information to estimate counts and sizes, does not decompress files, and provides an estimate of post-change size for a chosen target. Optional features let you simulate different target formats, such as different compression levels, and report resulting estimates and converted metadata in a structured output. The core outputs include estimated_size_bytes, compression_ratio, and a mapping of source vs target metadata for fields such as compression method, version, and flags.\n\nUse cases include preparing release packages, evaluating backup storage, and guiding retention decisions. The tool differentiates itself by offering direct metadata conversion alongside estimates, batch processing support, and exportable results suitable for automation pipelines. It adheres to ZIP standard conventions and remains robust across platforms, languages, and regional practices.

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