Explore practical technical guides, format comparisons, mathematical breakdowns, and developer references. Written and maintained by Nehal Ahmed Khan on PixelToFile.
A practical comparison of JPG, WebP, and PNG image formats. Learn which format to choose based on what your image contains—photographs, transparent graphics, UI screenshots, or vectors—and where it will be used.
Category: Image Optimization | Reading Time: 6 min read | Author: Nehal Ahmed Khan
Understand what causes large PDF file sizes and how to reduce them without compromising readability. Learn the difference between scanned and text-first documents, image downsampling, and preserving native text layers.
Category: PDF Optimization | Reading Time: 5 min read | Author: Nehal Ahmed Khan
A clear breakdown of Return on Ad Spend (ROAS) and Break-Even ROAS. Learn why ROAS is an efficiency metric rather than a profit metric, and how contribution margin determines true campaign sustainability.
Category: Finance & Marketing | Reading Time: 5 min read | Author: Nehal Ahmed Khan
A practical troubleshooting guide for common JSON parsing errors according to RFC 8259. Learn how to identify and fix trailing commas, single quotes, unescaped characters, and encoding issues.
Category: Developer Tools | Reading Time: 6 min read | Author: Nehal Ahmed Khan
A technical explanation of cryptographic hash functions, digest lengths, and collision resistance. Understand why SHA-256 is the modern standard for file checksums and why hashing is not encryption or password storage.
Category: Security & Cryptography | Reading Time: 5 min read | Author: Nehal Ahmed Khan
An explanation of the difference between decimal SI units (MB, GB) and binary IEC units (MiB, GiB). Understand why storage drive capacities look smaller in operating systems and the distinction between MB/s and Mbps.
Category: File Architecture | Reading Time: 5 min read | Author: Nehal Ahmed Khan