Our free developer tools are built by developers, for developers. Format and validate JSON instantly, generate QR codes with SVG export, test regular expressions with live highlighting, encode or decode Base64 and URLs, minify CSS and JavaScript for production, convert Markdown to HTML, decode JWTs, build cron expressions visually, and look up any HTTP status code. All tools run in your browser — no accounts, no rate limits, and no telemetry.
AI Code Explainer — Understand Any Code in Plain English
Paste any code snippet and get a plain-English explanation of what it does. Supports Python, JavaScript, Java, C++, and more — great for beginners and code reviewers.
SVG to PNG Converter – Free, No Upload
Convert mathematical SVG vectors into pristine PNG, JPEG, or WebP formats at immense scales. Guarantee perfectly pure transparent backgrounds and zero loss.
Favicon Generator – ICO + PNG + Manifest Free
Instantly build comprehensive favicon packages perfectly tailored for Progressive Web Apps. Generates required .ico files, iOS Touch icons, and HTML snippets.
Base64 Encoder / Decoder – Free Online Tool
Instantly encode and decode complex Base64 architectures online natively. Specifically supports structural Unicode text, raw file parsing, and data URIs.
Free QR Code Generator (SVG/PNG with Logo Support)
Create customizable QR codes for URLs, WiFi, contact cards, and more. Download as high-resolution SVG or PNG — add your logo and pick any color scheme.
Online JSON Formatter, Validator & Minifier
Paste raw JSON to format, validate, or minify it in one click. Syntax errors are highlighted with clear messages — great for debugging APIs and large datasets.
URL Encoder / Decoder – Free Online Tool
Safely encode or decrypt complex URLs and query strings using standard native encodeURI and form methodologies. Ensure 100% private client-side parsing.
Regex Tester – Live Regular Expression Tester Free
Rigorously test intricate Regular Expressions displaying live visual highlights, precise capture groups, and match insights spanning major JS parameters.
HTML Formatter & Minifier – Beautify or Minify HTML Free
Dynamically beautify messy HTML structural blocks utilizing configured indentations, or aggressively minify production layouts natively across your DOM.
CSS Minifier & Beautifier – Free Online CSS Compressor
Dramatically minify structural CSS stylesheets for production by radically purging comments and redundant whitespace. Monitor exact byte savings live.
JavaScript Minifier – Minify JS Free Online
Aggressively minify Vanilla JavaScript algorithms for active deployment. Meticulously preserve complex regex and literal strings locally and securely.
Markdown to HTML Converter – Live Preview Free Online
Compile complex native Markdown into semantic HTML with completely live visual rendering. Actively supports distinct GFM tables and robust code fences.
Color Code Converter – HEX RGB HSL HSB CMYK Free
Flawlessly convert highly specific structural color parameters between HEX, RGB, HSL, HSB, and CMYK. Immediately audit live WCAG native contrast rules.
HTTP Status Code Lookup – Complete 1xx–5xx Reference
Swiftly investigate exhaustive HTTP status algorithms navigating 1xx to 5xx tiers natively. Access meticulous developer contexts and standard resolutions.
JWT Decoder – Decode & Inspect JSON Web Tokens Free
Securely decode complex JSON Web Tokens (JWT) natively to analyze comprehensive header/payload claims. Guarantee entirely private client-side execution.
Cron Expression Generator – Visual Cron Builder Free
Visually construct intricate backend cron job expressions utilizing interactive field mapping. Seamlessly read plain-English parameter translation blocks.
Robots.txt generator for LLMs – Block AI Bots
Aggressively secure proprietary website content from sophisticated AI scrapers natively. Deploy custom robots.txt to explicitly block major LLM bots.
Invoice Generator – Free Online Invoice Maker
Instantly compile flawless professional corporate invoices online entirely free. Export pristine customizable layout PDFs securely absolutely no watermarks.