Comparison

PreviewFit vs JSON Formatter Viewer

Price, ratings, monetisation and update history for both apps, side by side โ€” with what reviewers say about each.

Head to head
About

PreviewFit

Easily transform screen recordings into App Store-ready preview videos. This tool automatically detects orientation and dimensions, trims to 30 seconds, and removes black bars for a clean export. It's designed for developers and marketers to create professional app preview content.

Highlights
  • Smart device output suggestions
  • Resize and center-crop
  • 30-second trimming
  • MOV and MP4 export
  • Optional audio removal
  • App Store requirement checks
Read full description

Preview Fit fixes screen recordings so they export as App Store-ready app preview videos for iPhone, iPad, and Mac. Drop in a video, let Preview Fit detect orientation and dimensions, trim to the 30-second maximum, then export in an App Store-friendly format without black bars. Features: - Smart iPhone, iPad, and Mac output suggestions - Resize and center-crop to accepted App Store preview dimensions - Forced 30 fps export - MOV and MP4 output options - Optional audio removal - Clear App Store requirement checks before export - Drag and drop on iPad and Mac Preview Fit is designed for developers, marketers, and ASO teams who need product page preview videos that upload cleanly.

About

JSON Formatter Viewer

Features
Read full description

Paste messy JSON and get clean, readable, correctly indented output in one tap. JSONViewer formats, validates, and beautifies any payload โ€” right on your iPhone, fully offline. Most JSON tools are websites that make you paste sensitive API data into a stranger's server. JSONViewer keeps everything on your device: paste a response, a config file, or a log export, and it pretty-prints with color syntax highlighting instantly. Invalid JSON is flagged with the exact reason so you fix broken payloads fast โ€” no guessing, no round trips to a browser. WHAT YOU GET - Clean, indented JSON from any pasted or copied payload in one tap - Instant validation that pinpoints exactly why a payload is broken - Minify mode to strip whitespace down to a compact one-liner - An interactive, collapsible tree so you can read deeply nested data at a glance - JSONPath queries that pull the exact value out of a large response - A saved library of your own snippets plus ready-to-use sample payloads PERFECT FOR - Backend and mobile developers debugging API responses on the go - QA engineers checking payloads and config files away from a laptop - Students learning JSON structure with the built-in Learn guide - Anyone who needs to read or clean a JSON blob without opening a website WHY NOT JUST USE A WEB FORMATTER? Online formatters send your JSON to a remote server โ€” a real problem when the payload holds tokens, user records, or internal data. JSONViewer does all parsing on-device, so your data never leaves your phone and works with no signal at all. PRIVACY Your JSON never leaves the device. No accounts, no servers, no tracking โ€” everything runs locally, even in airplane mode. FULL ACCESS The Format tab โ€” paste, validate, beautify, minify, and copy โ€” is free. Premium unlocks the interactive tree view, JSONPath query, saved snippet library, and expand/collapse controls. Premium is available as a weekly or yearly subscription, or a one-time lifetime purchase: - Weekly subscription - Yearly subscription - Lifetime (one-time purchase, no renewal) Payment is charged to your Apple ID at confirmation of purchase. Subscriptions auto-renew unless turned off at least 24 hours before the end of the current period. Manage or cancel anytime in App Store settings. Paste your first payload and clean it up now. Terms of Use (EULA): https://web-levi.web.app/terms Privacy Policy: https://web-levi.web.app/privacy-policy Questions? https://web-levi.web.app/#contact

Screenshots

PreviewFit4 screens
JSON Formatter Viewer4 screens

Verdict

The call

The clearest difference is in-app purchases: PreviewFit at none against JSON Formatter Viewer's 2. PreviewFit also leads on update cadence (every 2 weeks vs every 6 weeks) and device support (3 vs 1). JSON Formatter Viewer's advantage is chart position (#200 vs unranked) and iOS requirement (17.0 vs 26.0). On price and ads there is nothing between them.

Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. JSON Formatter Viewer sells 2 in-app purchases, starting at $3.99 per 7 days. PreviewFit asks for nothing beyond the download.

UpkeepUpdate frequency

PreviewFit ships an update every 2 weeks, JSON Formatter Viewer every 6 weeks. The most recent releases landed on October 7, 2026 and October 19, 2026 respectively.

Scorecard5 real differences ยท 4 level
PreviewFit versus JSON Formatter Viewer: the parameters behind the verdict, then further details
ParameterPreviewFitJSON Formatter Viewer
PriceFreeFree
Positive reviews100.0% of reviewsโ€”
Update frequencyEvery 2 weeks โ€” betterEvery 6 weeks
AdsNoNo
In-app purchasesNo โ€” betterYes
MonetizationFreeโ€”
Best chart rankโ€”#200 โ€” better
DevicesiPhone, iPad, Mac โ€” betteriPhone
Requires iOS26.017.0 โ€” better
Further details โ€” not scored
Size6 MB5 MB
Age rating4+4+
DeveloperAppmost ABPhuc Pham

In-app purchases

None

PreviewFit

No in-app purchases

2 purchases

JSON Formatter Viewer

Subscriptions2
  • Weekly$3.997 Days
  • Yearly$19.991 Year

Questions

Is PreviewFit free?
PreviewFit is free to download, with no in-app purchases.
Is JSON Formatter Viewer free?
JSON Formatter Viewer is free to download, with in-app purchases available.
Do PreviewFit or JSON Formatter Viewer have ads?
Neither PreviewFit nor JSON Formatter Viewer shows ads.
Which is updated more often, PreviewFit or JSON Formatter Viewer?
PreviewFit ships an update every 2 weeks, and JSON Formatter Viewer every 6 weeks. Most recently, PreviewFit was updated on October 7, 2026 and JSON Formatter Viewer on October 19, 2026.

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