# Cuelark Tools guides

- [HEIC vs JPG: what you actually lose when you convert iPhone photos](https://tools.cuelark.com/guides/heic-vs-jpg) (2026-11-02): We measured it: a quality-92 JPG is 7–54% bigger than the iPhone HEIC, with near-zero visible loss. What you do lose, and how to convert on Windows and Mac. Markdown: https://tools.cuelark.com/guides/heic-vs-jpg.md
- [How to compress a photo to under 100 KB for online forms (without it looking awful)](https://tools.cuelark.com/guides/compress-photo-to-100kb) (2026-11-02): Resize first, then lower quality. A worked example with measured sizes shows why 1,000–1,200 px is the sweet spot for 100 KB, plus settings for 50 KB and 20 KB. Markdown: https://tools.cuelark.com/guides/compress-photo-to-100kb.md