In-Depth Guides

Explore our collection of detailed guides covering image formats, compression techniques, PDF workflows and the privacy model behind local file processing.

• JPEG XL Explained — A plain-English guide to JPEG XL (.jxl): how it beats JPEG and WebP, which browsers actually support it now, lossless JPEG recompression, and when converting is worth it.
• AVIF vs WebP vs JPEG XL — AVIF, WebP and JPEG XL compared for file size, quality, encoding speed, transparency and real browser support in 2026 — plus which to pick and when to convert between them.
• Local File Processing — In-browser tools that never upload your files remove the biggest privacy risks of online converters. Why 'no upload' is safer, when it wins, and how to verify it yourself.
• Opening and Converting HEIC on Windows & Android — iPhone photos arrive as HEIC and refuse to open on Windows or older Android. How to view HEIC and convert it to JPG, PNG or WebP on any machine, with no upload.
• What Is AVIF? A Complete Format Guide — AVIF explained: how the AV1-based image format cuts photo sizes nearly in half, which browsers and apps open it today, why encoding still needs WebAssembly, and free local conversion with no upload.
• How to Reduce Image File Size Without Losing Quality — Practical ways to shrink photos and screenshots: how lossy and lossless compression differ, which format fits each job, and what quality settings really change.
• PDF Tools Guide: Merge, Split, Rotate & Convert — The PDF workflows people actually need — combine files into one, pull pages out, delete blanks, straighten sideways scans, flip documents into JPGs and stack photos back into PDFs — all runnable privately in your tab.