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Prettify - JSON/YAML/CSV viewer for the browser and Mac, no ads

I'm a full-stack dev, and I work with API responses all day. I used to paste them into online JSON formatters, but the free ones had ads and a small viewing area, and it was hard to find the fields I needed. The ones without those problems were recurring monthly or yearly subscriptions. I built Prettify to fix that for myself, and because I wanted a dev tool with a nice UI that I'd actually enjoy using every day. The free version has tree and table views, search, and conversio

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付费意愿

需求真实度

个人可落地

竞争空间

新鲜度

AI 分析

痛点：开发者在处理 API 响应时，免费的在线 JSON 格式化工具广告多、可视区域小、难定位字段，而无广告的替代品又多为按月/按年订阅收费。

目标用户：每天处理 API 响应的全栈/后端开发者、数据工程师

证据：The free ones had ads and a small viewing area, and it was hard to find the fields I needed. The ones without those problems were recurring monthly or yearly subscriptions. ... Pro is a one-time $19.99 fee, because who likes recurring monthly/yearly subscriptions.

变现：一次性买断制（$19.99 Pro 解锁 jq 查询、CSV SQL、diff），也可考虑团队授权或扩展包

MVP：做一个网页版 + 桌面版的多格式(JSON/YAML/CSV/XML)查看器：树/表格视图、搜索、格式转换、本地不上传文件，Pro 层加 jq 查询与 diff，主打无广告、无账号、一次性付费

竞品：JSON Crack、JSON Hero、jq、Insomnia、Postman、在线 JSON Formatter 类工具、DevUtils

摘要：一位全栈开发者因免费在线 JSON 工具广告多、可视区小、付费版又多是订阅制，自己花约 6 个月用 Claude Code 做出了 Prettify。产品支持 JSON/YAML/CSV/XML 的树状与表格视图、搜索与转换，浏览器与 Mac 桌面版均可、文件不上传，免费版无广告无账号，Pro 为一次性 $19.99（jq 查询、CSV SQL、diff）。这验证了『开发工具订阅疲劳 + 一次性买断』的付费意愿，但同类竞品极其密集、差异化空间有限。