PixelKit vs JSON, JWT & Dev Tools
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
PixelKit
This app offers precise unit conversions for designers and developers, specializing in pixels, inches, and centimeters. It includes tools for screen calculations, typography, and a wide range of supported units for digital and print work.
- Real-time unit conversions
- Pixel, inch, and centimeter calculations
- Screen size and PPI calculator
- Typography scale generator
- Supports multiple units (px, in, cm, mm, pt, em, rem, vw, DPI, PPI)
- Conversion history
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PixelKit is the all-in-one toolbox for designers and developers — a precise unit converter plus a full suite of design, print, and dev calculators in one fast, offline app. No account, no ads, no subscription. It started as the ONLY true pixel converter on the App Store — the only app that correctly converts inches to pixels at 1in = 96px. That precision is still the heart of PixelKit, now surrounded by the tools you reach for every day. THE CONVERTER: • Convert across 11 units: pixels, inches, cm, mm, picas, points, em, rem, viewport (vw), DPI, PPI • Real-time, pixel-perfect accuracy with a custom keypad • Conversion history, custom presets, batch convert, compare up to 3, CSV export • Copy all formats at once DESIGN & LAYOUT TOOLS: • Screen Calculator — PPI, retina class, megapixels, dot pitch, aspect ratio from width/height/diagonal • Aspect Ratio Calculator — lock dimensions, common and custom ratios, simplified GCD • Typography Scale Generator — modular type scale with per-step values • Coordinate tools — distance, area, golden ratio, grid alignment, center point PRO TOOLS (one-time unlock): • Print Production — bleed, paper GSM, binding, fold, stack thickness, die-cut • Image Assets — file-size estimation, print DPI, retina @1x/2x/3x, compression, color space (sRGB / Adobe RGB / CMYK) • Animation — frame rate, easing and bezier with code output, motion blur, duration, keyframes • Validation — WCAG AA/AAA contrast, pixel-perfect, platform compliance, print quality • Cross-platform — breakpoints, touch targets, viewport units, responsive typography EXPORT-READY CODE: • Most tools output ready-to-paste CSS and SwiftUI — easing to cubic-bezier(), breakpoints to @media queries, type scales, aspect ratios, and more BUILT TO KEEP: • Unified Recent — every calculation across every tool saved in one list, with favorites • Copy on every result, one tap • System, Light, and Dark mode • Fully offline — no account, no network, no ads ONE-TIME UNLOCK: • $6.99 once unlocks every Pro tool — and all future Pro tools, forever. No subscription. • Restore Purchases supported PERFECT FOR: • UI/UX designers • Web and app developers • Digital and print designers • Design students • Anyone who works in pixels, points, and ratios PixelKit turns the converter you needed into the toolbox you keep. Download it today. LICENSE AND USAGE This application is licensed, not sold, to you by HWY Enigma LLC. Your use of this application is governed by HWY Enigma's Terms of Service: https://hwyenigma.com/terms-of-service PRIVACY POLICY This application does not collect any personal data. Please review our Privacy Policy at https://hwyenigma.com/pixel-policy
JSON, JWT & Dev Tools
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Your clipboard, decoded. You're away from your laptop and a JWT shows up in an alert log. A JSON blob lands in Slack. A config diff needs checking. The usual answer is some website full of ads — which means pasting a production token into a stranger's server. Declip does all of it on your device. No account. No sign-in. PASTE & DETECT One tap. Declip reads the clipboard, works out what it's looking at — JSON, JWT, timestamp, Base64, color, URL — and opens the right tool with the result already on screen. No menu diving, no picking the format yourself. EIGHT TOOLS • JSON — pretty-print, minify and validate, with the exact offset of a parse error • JWT — decode header and payload, see exp / iat / nbf and whether the token is already expired • Base64 & URL — encode or decode, direction detected automatically, base64url supported • Unix timestamp — epoch to date and back, seconds and milliseconds detected, full timezone list • UUID — generate v4 or v7, up to 100 at once • Hash — MD5, SHA-1, SHA-256 and SHA-512 in a single pass • Color — HEX, RGB and HSL, with ready-to-paste Flutter, SwiftUI and Compose code • Text diff — line-by-line comparison of two versions WORKS WHERE YOU WORK • Share extension — select text in any app, hit Share, pick Declip. It parses right inside the sheet; no app switch needed. PRIVATE, ACTUALLY Every tool runs entirely on device. Tool input and output never leave your phone — there is no server to send them to. The clipboard is only ever read when you tap to read it, never in the background. No advertising identifier, no tracking prompt, no account linkage. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is in-app purchases: JSON, JWT & Dev Tools at none against PixelKit's 2. JSON, JWT & Dev Tools also leads on update cadence (weekly vs every 2 months). PixelKit's advantage is chart position (#189 vs unranked). On price, ads, device support and iOS requirement there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. PixelKit sells 2 in-app purchases, starting at $1.99 per month. JSON, JWT & Dev Tools asks for nothing beyond the download.
PixelKit ships an update every 2 months, JSON, JWT & Dev Tools weekly. The most recent releases landed on October 9, 2026 and October 4, 2026 respectively.
| Parameter | PixelKit | JSON, JWT & Dev Tools |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 2 months | Weekly — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Best chart rank | #189 — better | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.5 | 15.0 — better |
| Further details — not scored | ||
| Size | 5 MB | 38 MB |
| Age rating | 4+ | 4+ |
| Developer | HWY Enigma LLC | Petrichka Yaroslav |
In-app purchases
PixelKit
- Monthly Subscription7 Days trial$1.991 Month
- Pro Unlock$6.99
JSON, JWT & Dev Tools
No in-app purchases
Questions
Is PixelKit free?
Is JSON, JWT & Dev Tools free?
Do PixelKit or JSON, JWT & Dev Tools have ads?
Which is updated more often, PixelKit or JSON, JWT & Dev Tools?
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