#web

When building APIs, I constantly need to compare how response structures change between versions. For example, v1 returns user data one way, v2 restructures it, and v3 adds new fields. The problem: There's no visual diff tool specifically for API responses. I'm manually copying JSON responses into text diff tools, but they're optimized for code, not nested data structures. Changes to deeply nested objects are nearly impossible to spot. What I'm trying to accomplish: Catch breaking changes before they hit production. Last week I shipped an API update that renamed "user_id" to "userId" in a nested object 4 levels deep. It broke 3 client applications because I didn't catch it in testing. Current workaround: I paste responses into VS Code's diff viewer or online JSON diff tools. Neither highlights the actual impact - like "this field moved" or "this array structure changed" in a developer-friendly way. Who else faces this: Any backend developer maintaining versioned APIs, especially when working with mobile apps that can't force-update immediately. Why existing solutions fail: - Generic diff tools show character changes, not semantic changes - Postman can compare, but only side-by-side text - No tool shows "Field X moved from here to there" or "This will break clients expecting array format" I need something like Git's diff view but understanding JSON structure, not just text. Should show moved fields, type changes (string→number), and flag potential breaking changes.