Simon Willison’s Weblog

Prawn (via) Really nice PDF generation library for Ruby, used to generate Dopplr’s beautiful end of year reports.

Posted 16th January 2009 at 4:04 pm

Recent articles

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
LLM 0.27, the annotated release notes: GPT-5 and improved tool calling - 11th August 2025

dopplr 12 pdf 37 prawn 1 ruby 72

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