# DevKit: JSON, JWT & Dev Tools

> Offline Formatter & Debugger

Canonical page: [https://chrome-stats.com/d/id6754946567](https://chrome-stats.com/d/id6754946567)

## Overview

- **ID:** `id6754946567`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Alexander Herdt
- **Category:** Developer Tools
- **Rating:** 5.00 / 5 (3 ratings)
- **Version:** 1.0.7
- **Last updated:** 2026-07-23
- **First published:** 2025-11-28
- **Size:** 52 MB
- **Data as of:** 2026-09-21
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/devkit-json-jwt-dev-tools/id6754946567)
- **Website:** [https://devkitpro.app](https://devkitpro.app/)
- **Privacy policy:** [https://devkitpro.app/privacy](https://devkitpro.app/privacy)

## Description

30+ developer tools in one app — JSON, Base64, JWT, hashes & more. 100% offline, privacy-first. No data ever leaves your device.

DevKit puts 30 developer utilities in your pocket — and every one runs entirely on your device.

Stop juggling browser tabs. Stop pasting production tokens into random websites. Format JSON, decode a JWT, test a regex, or convert a timestamp on a train, on a plane, or inside a locked-down corporate network.

YOUR WORK STAYS ON YOUR DEVICE
> Every tool runs locally. The JSON you paste, the token you decode, the certificate you inspect — none of it is uploaded to a server, and none of it is visible to us.
> All 30 tools work with no internet connection.
> No account, no sign-up, no email required.

FORMATTERS
> JSON Formatter: Beautify or minify JSON with error highlighting and tree view
> HTML Formatter: Beautify, minify, and preview HTML with live rendering
> CSS Formatter: Format and validate CSS with syntax highlighting
> JS Formatter: Format and minify JavaScript
> XML Formatter: Format and validate XML documents
> SQL Formatter: Format and validate SQL queries

PARSERS & DEBUGGERS
> JWT Debugger: Decode tokens, inspect headers and payloads, verify signatures
> Cron Parser: Parse cron expressions with next run calculations
> Certificate Decoder: Decode X.509 certificates

ENCODERS & DECODERS
> Base64: Encode and decode Base64 strings
> URL Encoder: Encode, decode, and parse URLs
> HTML Encoder: Handle HTML entities
> Hash Generator: Generate MD5, SHA-1, SHA-256, SHA-512 hashes
> Backslash Escape: Escape and unescape special characters

CONVERTERS
> Timestamp: Convert Unix epoch timestamps to readable dates
> Case Converter: Transform between camelCase, snake_case, UPPER CASE, and more
> Color Converter: Convert between HEX, RGB, HSL with live preview
> YAML to JSON: Convert between YAML and JSON with tree view
> Number Base: Convert between Binary, Octal, Decimal, Hexadecimal
> Hex to Text: Convert between hex and ASCII
> CSV to JSON: Convert between CSV and JSON

GENERATORS
> UUID/ULID Generator: Create UUIDs and ULIDs instantly
> QR Code: Generate customizable QR codes and export as images
> Lorem Ipsum: Generate placeholder text
> Random String: Generate secure passwords and API keys

TEXT & COMPARISON
> Diff Checker: Compare text with highlighted differences
> RegEx Tester: Test regex with live match highlighting
> Markdown Previewer: Preview Markdown with GitHub Flavored support
> Line Sort: Sort and deduplicate lines
> String Inspector: Analyze string statistics

BUILT FOR MOBILE
> Smart History: Auto-saves recent work, stored only on your device
> Instant Paste: Smart clipboard detection
> Quick Actions: One-tap copy, clear, share
> Native Performance: Blazing fast, no loading screens
> Light & Dark Modes: Beautiful design for any environment

WHO IT'S FOR
> Software engineers debugging away from a desk
> Site reliability engineers checking cron schedules and certificates during an incident
> Backend developers inspecting tokens and payloads
> Engineering managers reviewing a diff or a config between meetings
> Anyone who needs dev tools without a network

PRICING
Pro: $9.99/month or $39.99/year (save 67%)
3-day free trial. Cancel anytime.

WHY DEVKIT
> Works with no connection
> Your work never leaves the device
> Fast, native performance
> Regular updates with new tools
> No ads, ever
> Built by a developer, for developers

Download DevKit and take your tools anywhere.

Terms of Use: Apple's Standard EULA (https://www.apple.com/legal/internet-services/itunes/dev/stdeula/)

## Rankings

- #531,542 — Overall
- #43 — json

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6754946567)