Best JSON formatter for vibe coders

The JSON formatter space is dominated by roughly 40-60 existing tools, ranging from browser-based utilities (JSONcrack, jsoncrush, prettier integrations) to VS Code extensions and CLI tools. The common failure point is that most are either over-engineered for casual use or too generic to address the specific workflow of fast-shipping developers who care about DX. Pain points cluster around three areas: (1) formatters that don't preserve intent or comments, (2) tools that require context-switching away from your editor, (3) lack of performance feedback on deeply nested structures. The actual gap sits at the intersection of speed, aesthetics, and customization—vibe coders want formatters that feel native to their workflow, validate in real-time, offer customizable output themes, and integrate seamlessly into their shipper toolkit. A new entrant should focus on either a hyper-focused CLI tool with zero dependencies that ships in milliseconds, a ridiculously fast browser experience with export-to-clipboard workflows, or a VS Code extension that doesn't just format but educates (showing schema violations, complexity metrics, or structural insights). The opportunity isn't in the formatter itself but in the *experience around* formatting—speed, accessibility, and supporting the vibe coder's ethos of friction-free shipping.