Guides
Practical guides for files you actually work with.
Format comparisons, compression targets, and step-by-step PDF and document workflows — each guide answers a real question with concrete numbers and a repeatable process, then links to the tool that does the job.
PNG vs JPG vs WEBP vs AVIF
Which image format to use, when — an honest comparison of the four formats the web runs on.
Read guideCompress images for the web
Practical steps and target sizes for making pages fast without visible quality loss.
Read guideConvert HEIC to JPG
Get iPhone photos onto Windows, Android, and the web without the "unsupported format" error.
Read guideMake a favicon from a PNG
Turn any logo or image into a multi-size ICO favicon in under a minute.
Read guideMerge PDFs
Combine contracts, scans, and chapters into a single clean document — plus when not to.
Read guideSplit a PDF
Extract chapters, pages, or ranges into standalone PDFs without installing software.
Read guideRotate PDF pages
Fix sideways scans and mixed-orientation documents so every page reads correctly.
Read guideMarkdown to PDF
Publish README files, notes, and AI answers as clean, shareable PDF documents.
Read guide