DevToolKit: Developer Tools

DevToolKit bundles the everyday utilities developers reach for — a JSON formatter, Base64 encoder, JWT decoder, regex tester, QR generator, and 17 more — into one clean, offline Android app. No tabs to juggle, no websites to load, no data sent anywhere. Whether you are reviewing a pull request on your phone, debugging a production issue away from your laptop, or just need to decode a token on the bus, DevToolKit has the tool on a single tap. ━━━━━━━━━━━━━━━━━━━━━━ 22 TOOLS, ORGANIZED ━━━━━━━━━━━━━━━━━━━━━━ FORMATTERS • JSON Formatter — beautify, minify, and validate JSON • XML Formatter — pretty-print or minify XML • SQL Formatter — format queries with keyword highlighting • Markdown Preview — render Markdown live ENCODERS & DECODERS • Base64 — text encode/decode • URL Encoder — escape URLs and query strings • HTML Entity — encode/decode HTML entities • JWT Decoder — header, payload, and expiry check • Base64 Image — convert images to and from Base64 GENERATORS • UUID — v4 random IDs, single or batch • Hash — MD5, SHA-1, SHA-256, SHA-512 (live update) • Lorem Ipsum — paragraphs, sentences, or words • Password Generator — SecureRandom, strength meter, configurable CONVERTERS • Timestamp — Unix epoch ↔ human date (UTC / local / ISO) • Number Base — dec, hex, oct, bin with auto-sync fields • Color — HEX, RGB, HSL with live preview • JSON ↔ YAML — one-click conversion both ways TEXT TOOLS • Regex Tester — live matches, capture groups, flags • Text Inspector — word / character / line count, case converter • Text Diff — line-by-line colour-coded diff BONUS • CRON Parser — plain-English description of any cron expression • QR Generator — turn text or URLs into scannable QR codes ━━━━━━━━━━━━━━━━━━━━━━ WHY DEVTOOLKIT ━━━━━━━━━━━━━━━━━━━━━━ • 100% offline — everything runs on your device. Paste JWTs, API keys, and production JSON without sending bytes to a server. • Clean, ad-light experience — a single banner, no pop-ups, no interstitials between tools. • Dark mode optimized — syntax colours adapt; monospace font across every tool. • Material Design 3 feel with quick search and grouped categories. • No account, no signup, no tracking across sessions. ━━━━━━━━━━━━━━━━━━━━━━ FREE AND PREMIUM ━━━━━━━━━━━━━━━━━━━━━━ Seven core tools (JSON, Base64, URL, Hash, Number Base, Lorem Ipsum, Timestamp) are available to everyone. The other fifteen advanced tools are part of Premium — a single one-time purchase with no subscription. Prefer not to buy? Watch a short video ad to unlock any tool for the session, or go Premium to remove the banner and unlock everything permanently. ━━━━━━━━━━━━━━━━━━━━━━ PERFECT FOR ━━━━━━━━━━━━━━━━━━━━━━ • Backend and front-end developers reviewing API payloads on mobile • QA engineers decoding tokens and diffing test outputs • DevOps and SRE on-call, away from the laptop • Students learning data formats, encodings, and regex • Anyone who keeps pasting "json beautifier" into their browser Got a tool we should add? Tap Contact Us in Settings — we read every message.