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DevUtils: Dev Toolkit

by Yen Nguyen more by this developer →

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Category: Developer Tools

Description

DevUtils is an offline-first developer toolkit with 37+ essential tools — all running privately on your device. No data leaves your phone.

PAYLOADS & DATA
• JSON Formatter & Validator — Pretty-print, minify, or validate JSON with syntax highlighting
• YAML ↔ JSON Converter — Seamless conversion between YAML and JSON
• XML Formatter — Indent and beautify XML documents
• CSV ↔ JSON Converter — Transform between CSV and JSON formats
• SQL Formatter — Format and beautify SQL queries
• HTML Entity Encoder/Decoder — Encode and decode HTML entities
• Backslash Escape/Unescape — Handle string escaping
• Text Diff Checker — Compare two texts and highlight differences

ENCODING & DECODING
• Base64 Text Encoder/Decoder — Encode or decode Base64 strings
• Base64 Image Encoder/Decoder — Convert images to/from Base64
• URL Encoder/Decoder — Percent-encode or decode URLs
• HTML Preview — Render HTML snippets live on device
• Markdown Preview — Render Markdown with live preview
• QR Code Generator — Create QR codes instantly
• QR Code Reader — Scan and decode QR codes

SECURITY & IDENTITY
• JWT Debugger — Decode, inspect, and verify JSON Web Tokens
• Hash Generator — MD5, SHA-1, SHA-256, SHA-512 and more
• HMAC Generator — Keyed hash authentication codes
• UUID/ULID Generator — Generate unique identifiers on demand
• Password Generator — Create strong, customizable passwords
• RSA Key Generator — Generate RSA key pairs
• Certificate Decoder — Inspect X.509 certificates

AUTOMATION & REGEX
• RegExp Tester — Build and test regular expressions with live matching
• Cron Expression Parser — Decode and schedule cron jobs
• Chmod Calculator — Unix file permission calculator
• Lorem Ipsum Generator — Generate placeholder text

TIME & NUMBERS
• Unix Time Converter — Convert between Unix timestamps and dates
• Date Converter — Parse and format dates in multiple formats
• Number Base Converter — Convert between binary, octal, decimal, hex
• Color Converter — Convert between HEX, RGB, HSL, and more
• Byte Converter — Convert between data size units
• Pixel Converter — Convert between px, pt, em, rem

ADDITIONAL TOOLS
• Text Inspector & Case Converter — Word count, case transforms
• List Converter — Sort, deduplicate, transform lists
• JSON to Code — Generate model code from JSON
• Phone Number Parser — Parse and validate phone numbers
• URL Parser — Break down URLs into components

All tools work 100% offline. Your data never leaves your device.

Alternatives to DevUtils: Dev Toolkit

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Growth

Change in ratings, scaled to each window from the real gap between crawls. A window needs a full period of history before it reports anything.

History

Tracking since 09/05/2026. History accumulates as changes are observed — check back soon.