JSON Master
JSON viewer, editor, formatter
$19.99
Nobody opens a JSON file to admire it. JSON Master gets you in, gets you what you need, and gets out of the way.
JSON Master is a JSON viewer and editor for the things you actually do all day: find the value, copy its path, copy the branch, and work out what a field really contains.
Every document is shown two ways, as a tree and as coloured source, and both are the same file.
WHAT MAKES IT DIFFERENT
- Every path is ready to paste, in whichever form you need it: dot, JSONPath, brackets, jq, Swift or JSON Pointer
- The inspector explains what a value really is: Unix timestamps as dates, JWT tokens decoded, base64, ISO dates, string length, integers beyond 2^53, duplicate keys
- Expand embedded JSON, the escaped string every webhook and log line contains, unwrapped in place
- Syntax colour that holds even when the document does not parse, which is exactly when it helps
- An untouched file is saved byte for byte as it arrived, and a broken one still opens with the line and column of the error
ALSO INSIDE
Format and minify, sort keys, remove empty values and duplicate keys, JSON Lines to array, JSONPath queries, document summary, structural compare, type generation for Swift, TypeScript and JSON Schema, JWT decoding, export to CSV.
Designed like an amber monitor: warm near-black surfaces, phosphor text, monospaced throughout.
Seven interface languages, switching without a restart. No account, no tracking, no analytics, no network access. Your documents never leave your device.
Universal app for iPhone, iPad and Mac.
LEGAL
- Privacy Policy: https://vybgss.github.io/json-master-docs/privacy-policy.html
- Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
The developer, Volodymyr Sichka, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Volodymyr Sichka
- Size
- 3 MB
- Category
- Developer Tools
- Compatibility
Requires iOS 18.0 or later.
- iPhone
Requires iOS 18.0 or later. - iPad
Requires iPadOS 18.0 or later. - Mac
Requires macOS 15.0 or later. - Apple Vision
Requires visionOS 2.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Volodymyr Sichka
