JSONViewer 1.1.0

Adds a row of text-transform tools with results shown in a line-numbered Output view (à la online-json.com).

New in 1.1.0

• JSON Escape / Unescape — Escape adds no outer quotes; Unescape strips matching outer quotes
• String UnEscape — general backslash unescape, keeps quotes
• BASE64 Encode / Decode
• URL Escape / Unescape — percent-encoding (RFC 3986 unreserved set)
• Gzip&BASE64Encode / BASE64Decode&Ungzip — real gzip via zlib, interoperable with the system gzip/gunzip
• Transform results render in a read-only, line-numbered output; editing input or running a JSON action returns to the JSON view

Also includes (from 1.0.0)

Format / Minify / Validate (line:col errors), syntax-highlighted text + collapsible tree view, JSONPath-subset extraction ($[*].id) into a separate window with Copy + Download.

Downloads

• JSONViewer-1.1.0.dmg — double-click, drag to Applications
• JSONViewer-1.1.0.zip — unzip and run

Notes

• Unsigned, arm64 (Apple Silicon) only. First launch: right-click → Open to bypass Gatekeeper.
• Built with swiftc (Command Line Tools only — no Xcode/SwiftPM). zlib linked via -lz.