Archive formats

Gzip header inspector

Read gzip flags, timestamp and optional header fields from a hex prefix.

Your inputs

Start with an example

Your inputs stay in your browser.

Your result

Example result

How it works

Read the 10-byte base header, then flagged extra data, filename, comment and optional header CRC. Strings end with null bytes.

The default prefix is a 10-byte deflate header with no optional fields or supplied modification time.

Limits

Header inspection only. The optional header CRC is reported, not verified. Compressed data, trailer CRC32 and member boundaries are not checked.