Gzip Decoder

Compress and decompress text using Gzip with Base64 encoding. Shows size comparison. All processing done in your browser.

Compress & Decompress Base64 Encoding Client-Side Processing

Input

Output

How to Use Gzip Decoder

Choose Mode

Select Compress (text to gzip) or Decompress (gzip to text) mode.

Enter Input

Paste Base64-encoded gzip data or plain text depending on the mode.

Convert & Review

Click Convert and check the size comparison and output.

What is Gzip?

Gzip is a file format and software application for compression and decompression. It uses the DEFLATE algorithm, which combines LZ77 and Huffman coding. Gzip is widely used for reducing file sizes in web servers, data transfer, and file archiving.

Common Uses

Web Compression

HTTP servers compress responses to reduce transfer size

File Archiving

Creating .gz compressed archives of files

API Payloads

Compressing large JSON or text payloads in APIs

Frequently Asked Questions

Why is the Base64 output larger than the input?

When compressing already-small or highly random data, Gzip compression may not reduce size, and Base64 encoding adds ~33% overhead. This tool shows the size comparison so you can evaluate the benefit.

What is the maximum input size?

This tool processes data entirely in your browser. Very large inputs (several MB) may work but could slow down your browser. For production compression of large files, use server-side tools.

Is this the same as .zip files?

No. Gzip compresses a single stream or file. The .zip format is an archive format that can contain multiple files with individual compression. Gzip is simpler and often used for single-file compression and HTTP content encoding.