ZIP Converter

Create compressed ZIP archives from multiple files instantly in your browser.

Drop files here to create a ZIP

or click to browse — any file types, multiple files

Bundle Files Into ZIP Archives

Select or drag multiple files, set a custom archive name, and create a compressed ZIP archive — all from your browser. No software installation needed. DEFLATE compression reduces archive sizes while maintaining full file integrity. Perfect for emailing multiple files, bundling project assets, or archiving documents.

ZIP Compression

Why Use This Tool?

Multi-File Support

Add as many files as you need. Mix and match any file types in a single archive.

100% Private

All compression happens locally. Your files are never transmitted to any server.

DEFLATE Compression

Standard DEFLATE algorithm for optimal file size reduction while maintaining compatibility.

Custom Naming

Name your archive anything you want. Organize your downloads with meaningful filenames.

How this ZIP Converter works

This archive creation tool bundles multiple files into a single compressed ZIP archive using the JSZip library running entirely within the browser. ZIP is the most widely supported archive format, readable by every major operating system without additional software.

The tool reads each uploaded file as an ArrayBuffer (preserving binary fidelity for images, executables, and any file type), then adds it to a JSZip instance under its original filename. Once all files are staged, JSZip generates the final archive using DEFLATE compression at level 6 (balanced speed/ratio), producing a standard ZIP file with the proper local file headers, central directory, and end-of-central-directory record per the PKZIP specification.

Compression progress is tracked through JSZip's generation callback, which reports percentage completion as each file is compressed and written to the archive stream. The resulting ZIP blob is offered for download with a user-configurable archive name. The DEFLATE algorithm achieves excellent compression on text-based files (documents, code, SVG, CSV), moderate compression on already-compressed formats (JPEG, MP3, MP4), and near-zero compression on highly compressed formats (ZIP, 7z). All processing remains browser-local — uploaded files never leave the user's device.

How to use this ZIP Converter

Add Files

Drag and drop or select multiple files you want to include in the archive.

Name Your Archive

Set a custom name for your ZIP file (optional).

Download ZIP

Click Create ZIP and download your compressed archive.

Example Usage

Bundle multiple project files into a single compressed ZIP archive.

Input

5 project files (report.pdf, data.csv, chart.png, notes.txt, summary.docx)

Output

project_bundle.zip

Frequently Asked Questions

What types of files can I add to the ZIP archive?

Any file type can be added — documents, images, videos, code files, spreadsheets, or any other file you need to compress and bundle together.

Is there a file count or size limit?

There is no fixed limit on the number of files. However, very large total file sizes (over 1GB) may be slow to process depending on your device. For most use cases, performance is excellent.

Does this tool compress files?

Yes. Files are compressed using DEFLATE compression, which typically reduces file sizes significantly. Text files and documents see the best compression ratios.

Are my files kept private?

Absolutely. The entire ZIP creation process happens locally in your browser. No files are uploaded to any server — everything stays on your device.

Can I customize the archive name?

Yes. You can set a custom name for your ZIP archive before creating it. The default name is "archive.zip".

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The ZIP Converter is maintained by CodeItBro. We aim to provide the best free developer tools on the web. If you have feedback or suggestions, please visit our contact page.

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