Convert URL to PDF suitable for mobile reading.
从URL提取图片并生成PDF（保持原文顺序，不排序）
Shorten URLs via tinyurl or bitly API
Develop Arduino projects avoiding common wiring, power, and code pitfalls.
Reduce or quit caffeine with withdrawal tracking, tapering plans, and energy milestones
Compresses a given PDF file to reduce its size.
Parse, generate, and transform XML with correct namespace handling and encoding.
