ZestKit: Compress an Image to 100KB Without Guessing

ZestKit is a focused browser-based image compression tool for meeting strict 100KB upload limits without guesswork. This eight-page guide explains how the compressor verifies the actual final encoded file at 100,000 bytes or less, preserves original dimensions when possible, adjusts encoding quality before reducing dimensions, and keeps JPG, PNG, and WebP processing inside the browser tab. It also covers a practical three-step workflow, privacy-by-default local processing, quality checks, and common uses for passport, visa, job application, school, examination, and government upload portals.