Show HN: Make your logo extra bright on HDR screens

Hacker News reports a new browser‑based utility that adds a gain map to a JPEG, making a logo appear brighter on high‑dynamic‑range screens such as the latest MacBook Pro. The author built the tool with Claude Code, offers it without any registration, and notes that LinkedIn is the only social network that currently preserves the gain map. It provides a simple way to make a logo pop on HDR displays.

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