GZip Decompress Online

Inflate GZip-compressed text from Base64, hex, or binary-string input and inspect the decoded result without sending data to a server.

Last updated: May 28, 2026

Paste a Base64, hex, or binary string containing GZip-compressed data. The sample expands to readable UTF-8 text.

GZip Input

Decompressed Output

Client-Side Processing

Input Data Stays on Device

Instant Local Execution

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What is GZip Decompress Online?

GZip is a compression format commonly used for HTTP responses, log archives, API payloads, and build artifacts. This tool takes GZip-compressed bytes encoded as Base64, hex, or a binary string and expands them back into UTF-8 text so you can inspect the original payload.

How to Use GZip Decompress Online

Paste GZip-compressed data into the input area.

Choose Base64, hex, or binary string depending on how your bytes are encoded.

Click Decompress to inflate the payload.

Copy the decoded text or download it as a .txt file.

If decompression fails, confirm the input is actual GZip data and not plain zlib/deflate.

Common Use Cases

Inspecting compressed API or webhook payloads captured from logs.
Decoding Base64-encoded GZip strings from queues or databases.
Checking whether an HTTP response body was compressed correctly.
Debugging build or export pipelines that emit .gz content.
Reviewing compressed configuration snapshots without a command-line tool.

Example Input and Output

A small Base64-encoded GZip payload expands into a readable sentence.

GZip Base64 input

H4sIAAAAAAAACgXBQQ6AIAwEwK/sC3iHRw8knkHWSNJS0mrU3zuzUMRwuCk21mwmsUoZvBLy2QO76XRGsCGKTiH4zjJaoA98djuq2xP09AOKRdLFSgAAAA==

Decompressed text

Hello from WebToolsPlanet. This compressed sample expands in your browser.

Browser-side processing

The compressed input and decompressed output stay in your browser. Nothing is sent to WebToolsPlanet servers.

Format tip

Most log systems store compressed bytes as Base64. If your source starts with H4sI, Base64 GZip is a likely match.

Frequently Asked Questions

Does this work with .gz files?

This page works with the bytes from a GZip file after they are represented as Base64, hex, or a binary string.

Is GZip the same as zlib?

No. GZip and zlib both use deflate compression internally, but they use different wrappers. Use the zLib Decompress tool for zlib-wrapped deflate data.

Is my compressed data uploaded?

No. Decompression uses the browser DecompressionStream API and runs locally on your device.

Why did decompression fail?

The most common causes are invalid Base64 or hex, using zlib data in the GZip tool, or pasting already-decompressed text.