Skip to content

GZIP Compressor & Decompressor

Compress UTF-8 text or exact file bytes to GZIP, or decompress .gz files and Base64-encoded GZIP data locally in your browser.

Local input limit: 5 MB · Processing timeout: 15 s

Inspect local OCSP data

Only the supplied request/response is parsed; AIA and OCSP URLs are never fetched.

Did DecodeLens help?

Support the continued development of independent, browser-local developer tools.

Buy Me a Coffee

GZIP bytes, header, and decoded content in one view

GZIP wraps DEFLATE-compressed bytes with a small RFC 1952 header and a CRC32/size trailer. DecodeLens keeps the exact bytes available while exposing the fields that help diagnose API payloads, backups, logs, and downloaded .gz files.

Supported input and safety rules

  • Compresses UTF-8 text and exact file bytes with the browser-native GZIP stream implementation.
  • Decompresses a .gz file or Base64-encoded GZIP input and validates its header, CRC32, and stored size.
  • Decompressed bytes use the shared file detector, preview, text, hex, metadata, and download views.
  • Concatenated multi-member GZIP, password protection, TAR extraction, and recursive decompression are not performed in this version.
  • Output size, expansion ratio, worker time, and memory use are limited to keep the browser responsive.

Related tools for this workflow

Continue with tools that decode, convert, inspect, or verify the same data.