100% Client-Side

Gzip Compress / Decompress

Free online Gzip compression and decompression tool. Compress text to gzip or decompress Base64-encoded gzip data. Powered by pako.js. — runs 100% in your browser, client-side only. No data is sent to any server. Free to use, no account required.

Free Client-Side No Login No Storage
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Base64 Encoder Encode text or binary data to Base64 — standard and URL-safe variants Base64 Decoder Decode Base64 strings back to plain text or binary data Hex Encoder Convert text to hexadecimal — useful for debugging and binary inspection

How to Use the Gzip Compress / Decompress

  1. Choose Compress or Decompress mode.
  2. Enter text (compress) or Base64-encoded gzip data (decompress).
  3. Click the action button.
  4. Copy or download the result.

Powered by pako.js. All processing is client-side.

What is Gzip Compress / Decompress?

Gzip compression reduces file sizes using the DEFLATE algorithm, commonly used for HTTP compression and file archiving. Decompression restores the original data from gzip-compressed content.

Why Use This Tool

Gzip is the standard for HTTP content compression, reducing bandwidth and improving page load times. Developers need to compress assets and decompress received content for debugging.

When to Use It

Use gzip when compressing assets for web delivery, decompressing HTTP responses for inspection, reducing file sizes for storage, or debugging gzip-encoded API responses.

Who Should Use It

Frontend performance teams, backend API developers, and DevOps engineers optimizing payload size.

How to Use the Gzip Compress / Decompress

  1. Paste or upload content
  2. Choose compress or decompress mode
  3. Generate output and compare size reduction
  4. Integrate compressed assets into deploy flow

Security note

Compression is not encryption. Consider BREACH/CRIME exposure when compressing sensitive reflected responses over TLS.

Common Uses

  • Compressing web assets
  • Decompressing HTTP responses
  • Reducing file sizes for storage

Frequently Asked Questions

What's the typical compression ratio?

Text compresses well — 60-80% reduction is common. Already-compressed formats (JPEG, PNG, MP3) see little benefit since they're already compressed.

Is gzip the same as zip?

Different but related. Gzip uses DEFLATE compression for single files. ZIP is a container format that can hold multiple files, often using DEFLATE internally.

Is this safe for sensitive data?

CipherKit compresses/decompresses entirely in your browser. Your data never leaves your device.