Dev Tools Pro

You don't need another browser tab. For years you've been bouncing between half a dozen tool sites — one for formatting JSON, one for JSONPath queries, one for cURL, one for diffing, one for JWT, one for URL parsing. Dev Tools Pro is the one app that replaces all of them. Native macOS. Single window. Fully offline. Everything you paste stays on your Mac. Why a native app - No more "is this tool still up?" — every tool opens in milliseconds, no network round trip. - No more "did I just paste a production token into a random site?" — every operation runs locally in App Sandbox. - No more 12 open tabs — one window, sidebar navigation, ⌘1–4 jump keys. What's inside JSON - Format, minify and validate. - Tree visualization with syntax highlighting and structure stats. - JSONPath queries with array indexes and wildcards. - Convert to YAML, XML, Base64 or CSV. - Sort keys, flatten, unflatten, merge, extract keys. - JSON Patch-style diff between two documents. - Fetch JSON from any URL. - Local history of recent operations. APIs and web - Parse and execute cURL commands. - Decode JWT header and payload (no signature trust). - Break URLs into components and query parameters. - Embedded Network Inspector — captures fetch, XHR and resource timings; exports JSON or HAR. - Embedded OpenAPI Beauty viewer for spec inspection. File compare - Line-by-line text diff. - Image compare with split, fade, slider, pixel-highlight and subtract modes. - PDF, RTF, HTML and plain-text document compare. - CSV, TSV and text-exported table compare. - Recursive folder diff with optional SHA-256 hashing. Built native - 100% native SwiftUI. - App Sandbox compliant — network used only for URLs you type; file access only for files you pick. - Privacy manifest declares zero tracking and zero data collection. - No analytics, no account, no telemetry. If you've been pasting JSON into random tool sites and wondering whether you should, this is the app that fixes that.