PrismKit vs JSON Master
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
PrismKit
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PrismKit is a developer's Swiss Army knife: a collection of fast tools that run entirely on your iPhone and iPad ā offline, with nothing ever sent to a server. Paste a production token, a private config, or any sensitive data with confidence. Everything is processed locally on your device. TOOLS INCLUDED ⢠JSON ā YAML ā Convert between both formats in either direction. ⢠JSON ā TOON ā Convert to and from TOON, the compact format that saves tokens when working with AI models. ⢠JSON Format ā Format, validate, and minify with error detection. ⢠Base64 ā Encode and decode text. ⢠URL Encode ā Encode and decode URL strings. ⢠JWT Decoder ā Inspect the header and payload, see the expiry, and verify the HMAC signature (HS256, HS384, and HS512). ⢠Hash ā Generate SHA-256, SHA-512, and MD5. ⢠QR Code ā Generate and customize QR codes with colors, a logo, and PNG export. ⢠UUID ā Generate unique identifiers in batches. ⢠Regex Tester ā Test regular expressions and see matches and their groups. ⢠Diff ā Compare two versions of text line by line and spot the differences. BUILT TO BE FAST ⢠Command palette (āK) to jump to any tool in seconds. ⢠Mark your favorite tools to keep them within reach. ⢠Copy any result with a tap. ⢠Optimized for iPhone and iPad, with a two-column layout on larger screens. ⢠Light, dark, and automatic themes. PRIVACY FIRST ⢠100% offline: no tool needs an internet connection. ⢠No accounts, no analytics, no ads, no tracking. ⢠We collect absolutely no data. Made by developers, for developers.
JSON Master
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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/
Screenshots
Verdict
The clearest difference is iOS requirement: JSON Master at 18.0 against PrismKit's 26.0. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price Ā· Rating Ā· Positive reviews Ā· Number of ratings Ā· Update frequency Ā· Ads Ā· In-app purchases Ā· Monetization Ā· Best chart rank Ā· Devices Ā· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | PrismKit | JSON Master |
|---|---|---|
| Price | Free | Free |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad, Mac ā better |
| Requires iOS | 26.0 | 18.0 ā better |
| Further details ā not scored | ||
| Size | 6 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | JUAN DE DIOS FRAUSTO RAMIREZ | Volodymyr Sichka |
In-app purchases
PrismKit
No in-app purchases
JSON Master
No in-app purchases









