ZIP to TAR.GZ Converter

Convert ZIP to TAR.GZ online for free. Fast, secure archive conversion that preserves folder structure and file integrity. No software installation required.

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ZIP vs GZ: Side-by-side

Technical comparison of the two formats — useful for deciding which to use, or for confirming what changes during conversion.

Property	ZIP	GZ
Full name	ZIP Archive	GNU Zip
Year introduced	1989	1992
Developer / standard body	PKWARE (Phil Katz)	GNU Project
MIME type	application/zip	application/gzip
File extension	.zip	.gz
Compression	DEFLATE (typically)	DEFLATE (single-file compression)
Color / data depth	N/A	N/A
Max dimensions / size	4 GB per file (ZIP64 extension lifts this)	4 GB uncompressed (typical)
Transparency	No	No
Animation	No	No
Standard / specification	PKWARE APPNOTE / IETF RFC 1951	IETF RFC 1952
Best for	Universal archives — opens natively on Windows, macOS, Linux	Single-file compression, often inside .tar.gz archives

About the ZIP Format

ZIP is an archive file format created by Phil Katz in 1989 with the PKZIP utility. It is the most universally supported archive format, opening natively on Windows, macOS, and Linux without requiring any additional software. ZIP uses the DEFLATE compression algorithm to reduce file sizes while bundling multiple files and directories into a single archive. It provides good compression for documents and text-based files, though its compression ratio is moderate for media files.

A key advantage of ZIP is that each file inside the archive is compressed independently, allowing individual files to be extracted without decompressing the entire archive. ZIP supports optional AES-256 encryption for password-protected archives. While ZIP does not achieve the highest compression ratios compared to formats like 7Z, its universal compatibility and native OS support make it the default choice for file distribution and sharing across every operating system.

ZIP to GZ FAQ

Quick answers about compatibility, quality, metadata handling, and the most common reasons to convert ZIP files to GZ.

How do I convert ZIP to GZ without extracting files manually?

Upload your ZIP file to iFormat and click Convert. Every file and folder inside is extracted and re-packaged as GZ with the folder structure intact — no need to extract, reorganise, and re-compress yourself. It's free and needs no account.

Does converting ZIP to GZ keep my folder structure?

Yes. All files, nested folders, and the hierarchy inside your ZIP archive are preserved when they're re-compressed into GZ, so the contents open exactly as they were organised.

Why convert ZIP to GZ?

ZIP is the universal archive format good for compressing files on any OS. GZ is gzip compression best for compressed single files on Unix. Convert when the recipient's software opens GZ more easily, or when you need its compression or compatibility.

Are the files inside the archive changed during conversion?

No — the individual files are only re-compressed, not modified. A document, photo, or spreadsheet inside your ZIP archive is byte-for-byte identical after it's re-packaged as GZ.

Can I convert ZIP to GZ on Mac, Windows, or Linux?

Yes. iFormat works in any modern browser on any operating system — no need to install WinRAR, 7-Zip, or any other desktop tool. Upload the ZIP archive, convert to GZ, and download.

Is there a file size limit for ZIP to GZ conversion?

The free plan supports files up to 50 MB, which covers the large majority of ZIP files. For longer or higher-resolution files, Starter raises the limit to 100 MB, Plus to 1 GB, and Pro to 5 GB.

Archive Format Guides for ZIP to TAR.GZ Converter

Read compatibility and compression guides for ZIP, 7Z, RAR, TAR, and related archive workflows.

File Compression Formats Explained — ZIP, RAR, 7Z, GZIP, TAR & More

A complete guide to file compression and archive formats. Compare ZIP, RAR, 7Z, GZIP, TAR, and BZIP2 by compression ratio, speed, and compatibility.

ZIP vs RAR vs 7Z vs TAR — Which Archive Format and When

ZIP vs RAR vs 7Z vs TAR compared. Compression ratio, compatibility, speed. When to use each archive format. Practical guide with real-world examples.

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DjVu files are common in academic archives but almost nothing opens them natively. Here's how to convert DjVu to PDF and why the format still exists.