Simon Willison’s Weblog

Justniffer. Packet sniffing tool that can output sniffed HTTP traffic formatted the same way as an Apache access_log file.

Posted 25th September 2009 at 10:12 pm

Recent articles

V&A East Storehouse and Operation Mincemeat in London - 27th August 2025
The Summer of Johann: prompt injections as far as the eye can see - 15th August 2025
Open weight LLMs exhibit inconsistent performance across providers - 15th August 2025

apache 37 justniffer 1 logging 19 networking 22 packetsniffing 1

Monthly briefing

Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments.

Pay me to send you less!

Sponsor & subscribe