Essential
Developer Utilities
A curated collection of fast, secure, and beautiful utilities for modern frontend developers. Everything you need, right in your browser.
JSON to TypeScript
Instantly generate valid TypeScript interfaces from your JSON data.
CSS Generators
Create beautiful gradients and box-shadows visually.
Regex Tester
Test, evaluate, and highlight regular expressions in real-time.
JWT Decoder
Securely decode JSON Web Tokens entirely in your browser.
SVG to React
Convert raw SVG code into valid JSX/TSX React components instantly.
Cron Generator
Build complex cron expressions easily with a visual interface.
Text Diff Checker
Instantly compare two blocks of text or code to find differences.
NEXTAUTH_SECRET
Generate a secure, random 32-byte secret for NextAuth.js configuration.
JWT_SECRET
Create strong secrets for signing JSON Web Tokens securely.
Bcrypt Generator
Hash passwords securely using the industry-standard bcrypt algorithm.
CSRF Token
Generate random tokens to prevent Cross-Site Request Forgery attacks.
Base64 Encoder
Easily encode and decode strings to and from Base64 format.
cURL <-> Fetch Converter
Convert cURL commands into fetch() requests and back for faster API testing.
UUID / NanoID
Generate unique identifiers like UUID v4 or NanoID instantly.
API Key Generator
Create secure, customizable API keys and tokens with custom length and charset.
URL Encoder / Decoder
Safely encode or decode URL components for safe transmission.
Query Params Parser
Extract, format, and parse query parameters from any URL.
HTTP Headers Inspector
Inspect and analyze HTTP response headers for any public URL.
HTTP Status Code Explorer
Browse common HTTP status codes, meanings, and how to respond to them.
OAuth State Generator
Generate secure random strings to prevent CSRF in OAuth flows.
JSON Formatter
Validate, format, and beautify your JSON data easily.
Mock Data Generator
Generate realistic mock users, products, and orders in JSON format.
Tailwind Formatter
Sort, merge, and clean up your messy Tailwind CSS classes.
React Boilerplate
Quickly generate React component boilerplates with TS support.
Timestamp Converter
Convert between Unix timestamps and human-readable dates.
Timezone Converter
Compare a specific time across multiple global timezones instantly.
Color Palette
Convert colors between HEX, RGB, and HSL formats.
Case Converter
Convert text between different programming casing conventions.
Lorem Ipsum
Generate placeholder text for your designs.
Markdown Previewer
Write and preview GitHub Flavored Markdown in real-time.
Word Counter
Real-time text analysis, word, and character counter.
Prompt Token Counter
Estimate OpenAI, Claude, and Gemini token counts from pasted prompts.
QR Code Generator
Generate custom QR codes from any URL or text. Customize colors, size, and download as PNG.
VS Code Snippet Gen
Build VS Code snippets with tab stops and placeholders. Live JSON preview for any language.
Meta Tag Generator
Generate SEO-optimized HTML meta tags with live Google, Facebook, and Twitter previews.
Robots.txt Generator
Build and test robots.txt rules visually to optimize search engine crawl access.
Frequently Asked Questions
Everything you need to know about DevUtils Lab.
Yes! All tools on DevUtils Lab are 100% free forever. We believe in providing accessible, high-quality utilities for the developer community without paywalls, limits, or hidden fees.
Absolutely. DevUtils Lab is designed with privacy-first principles. All operations, conversions, and generations happen locally in your browser. We do not transmit or store your sensitive data, tokens, or text diffs on any servers.
Currently, DevUtils Lab operates entirely as a client-side frontend suite. However, we are exploring adding a robust public API for developers who want to integrate these formatting and generation tools into their own pipelines.
Yes, the platform is fully responsive. You can easily generate cron schedules, convert timestamps, decode JWTs, or format text on the go, directly from your smartphone or tablet.
We are constantly expanding our toolkit based on community feedback. New developer utilities, converters, and code generators are added regularly to cover emerging use-cases and workflows.