JSON Master vs 42 Editor
Price, ratings, monetisation and update history for both apps, side by side ā with what reviewers say about each.
JSON Master
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JSON Master is a native JSON editor built around what you actually do with JSON every day: find the value, copy its path, understand what a field really contains ā and fix the file when it doesn't parse. See the whole document as a tree and as colour-highlighted source, side by side on iPad and Mac. Both are the same file: change one, and the other follows. FIND YOUR WAY ⢠Command palette: type a few letters and jump to any node or run any command ā "custcity" finds customer.address.city ⢠Breadcrumbs, back and forward after every jump ⢠Search keys and values, step through matches ⢠Full keyboard navigation on Mac and iPad UNDERSTAND A VALUE ⢠Unix timestamps shown as readable dates ⢠JWT tokens decoded: header, claims and expiry ⢠base64, ISO dates and URLs recognised on sight ⢠Warnings for integers too large for JavaScript ⢠Collapsed branches show their first keys, so you often don't need to open them QUERY, COMPARE, GENERATE ⢠JSONPath queries with live results ā tap one to jump to it ⢠Compare two documents by structure, not by line breaks ⢠Generate Swift Codable, TypeScript interfaces or JSON Schema ⢠Summary with node counts, depth and findings worth a look FIX AND EDIT ⢠A broken file shows the exact line and column of the error ⢠One-tap repair for almost-JSON: comments, trailing commas, single quotes, bare keys ⢠Edit keys and values, change types, add, duplicate and delete ā every edit undoable ⢠Format, minify, sort keys, expand embedded JSON strings, convert JSON Lines ⢠Copy paths in six notations: dot, JSONPath, brackets, jq, Swift and JSON Pointer MADE FOR LARGE FILES Files of tens of megabytes open without freezing, with progress shown while they load. YOUR WAY Four themes ā Midnight, Graphite, Amber CRT and Daylight ā and seven languages: English, German, French, Ukrainian, Spanish, Japanese and Portuguese. No account, no ads, no tracking. Your files stay on your device. 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/
42 Editor
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42 Editor is a code and text editor for iPhone and iPad. It opens the files you already have, in the Files app, iCloud Drive, Working Copy, Dropbox or any other file provider, and saves your changes back to the same file. There is nothing to sign in to and nothing is uploaded. Sometimes the file that needs fixing is a config file, a script or a spreadsheet export, and the only device to hand is a phone. 42 Editor is made for those moments. EDIT IN PLACE ⢠Open a file or a whole folder from any provider in the Files app. Your changes go back to the original. ⢠Opened folders are remembered: create, rename, duplicate and delete files and folders inside them. ⢠Recent files reopen with one tap. ⢠Open in 42 Editor from the Files app and the share sheet. SYNTAX HIGHLIGHTING FOR 29 LANGUAGES Python, Swift, JavaScript, TypeScript, C, C++, Objective-C, C#, Java, Kotlin, Go, Rust, PHP, Ruby, Dart, Lua, R, JSON, YAML, TOML, INI, XML, HTML, CSS, Markdown, Shell, SQL, Makefile and Dockerfile, in light and dark. Line numbers with the current line marked, and long lines that wrap or scroll sideways. A KEYBOARD ROW FOR CODE Tab and outdent, a comment toggle, cursor keys, undo and redo, and the brackets and symbols the iOS keyboard hides. Auto-indent, optional closing of brackets and quotes, and tabs or spaces at 2, 4 or 8 wide. FIND, REPLACE AND FORMAT ⢠Find and Replace, Go to Line, toggle comment, and indent or outdent a selection. ⢠Format or minify JSON, keeping the order of the keys. ⢠Markdown and HTML preview, a tap away. CSV AND TSV AS A TABLE A grid with a pinned header row. Edit cell by cell; add, duplicate or delete rows and columns; sort, filter and undo. The raw text is one tap away. CAREFUL SAVING 42 Editor keeps each file's text encoding (UTF-8, UTF-16 or Windows-1252), its line endings and its final newline. It autosaves two seconds after you stop typing, and if another app changed the file in the meantime it stops and asks which version to keep. iPHONE AND iPAD System, light or dark appearance, font size from 9 to 32 pt, and āS to save on a hardware keyboard. PRIVATE No account, no ads and no analytics. Your files stay on your device and in the providers you choose. 42 Editor is an editor, not a place to run code: it doesn't compile or run anything.
Screenshots
Verdict
JSON Master and 42 Editor are too close to call on the numbers: across 5 compared parameters ā price, ads, in-app purchases and device support among them ā neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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 | JSON Master | 42 Editor |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 months | ā |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, Mac ā better | iPhone, iPad |
| Requires iOS | 18.0 | 17.0 ā better |
| Further details ā not scored | ||
| Size | 5 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Volodymyr Sichka | Mohammed Shehada |
In-app purchases
JSON Master
No in-app purchases
42 Editor
No in-app purchases









