⚙️ Developer Tools

32 free developer tools — JSON formatter, Base64, URL encoder, regex tester, JWT decoder, hash generator, UUID, SQL formatter and more. Everything runs locally — no data sent to any server.

📋 JSON Formatter

Format, validate, and minify JSON instantly in the browser — no data sent to any server.

🔐 Base64 Encoder / Decoder

Encode text to Base64 and decode Base64 strings back to original text instantly. No data sent to any server — free online encoder.

🔍 Regex Tester

Test and debug regular expressions in real time with match highlighting. Uses standard JavaScript regex syntax — free online regex tester.

🔗 URL Encoder / Decoder

URL-encode and decode strings for safe use in web addresses. Encode special characters to percent-encoding and decode %XX sequences — free online.

🔢 Hash Generator

Generate SHA-1, SHA-256, and SHA-512 hashes from text instantly. All hashing runs in your browser — data never leaves your device.

🆔 UUID Generator

Generate random v4 UUIDs instantly. Bulk generate up to 20 at once, copy individually or all at once — free, runs entirely in your browser.

🎨 HEX to RGB Converter

Convert HEX color codes to RGB and HSL values instantly, or convert RGB back to HEX and HSL — free online color format converter.

🎨 Color Code Converter

Convert between HEX, RGB, and HSL color formats instantly. Live preview swatch included — free online tool.

🏷️ Meta Tag Generator

Generate complete HTML meta tags for SEO, Open Graph, and Twitter Cards. Fill the form and copy the ready-to-paste code — free online tool.

🔑 JWT Decoder

Decode and inspect JWT (JSON Web Tokens) to view header, payload, and expiry. Decode only, no signature verification — free, no data sent to servers.

💾 Text to Binary

Convert text to binary code and binary back to text instantly. Works reliably for standard ASCII text — free online converter.

🔒 HTML Encoder / Decoder

Encode and decode HTML entities: convert & < > " ' and special characters to their HTML equivalents and back — free online HTML encoder and decoder.

🗄️ SQL Formatter

Format and beautify SQL queries instantly with automatic indentation and keyword capitalization — free online SQL formatter.

📄 XML Formatter

Format and validate XML with proper indentation. Errors are flagged clearly — free online XML formatter and validator.

📄 YAML to JSON

Convert YAML to JSON instantly, with basic error detection — free online converter.

📦 JavaScript Minifier

Minify JavaScript code to reduce file size for faster load times. Removes whitespace and comments — free online JS minifier.

📦 CSS Minifier

Minify CSS to remove whitespace and comments for faster page loads. Preview original vs minified size instantly — free online CSS minifier.

✍️ Markdown Previewer

Preview Markdown with live rendering as you type — headings, bold/italic, links, inline code, and lists — free online Markdown previewer.

📄 JSON to YAML

Convert JSON to YAML with proper indentation instantly — free online JSON to YAML converter.

⏱️ Cron Expression Parser

Parse cron expressions into a plain-English description instantly. Supports standard 5-field and 6-field (with seconds) syntax — free online cron parser.

📦 HTML Minifier

Minify HTML to remove whitespace and comments for smaller page payloads — free online HTML minifier.

🤖 Robots.txt Generator

Generate a robots.txt file for your website. Select crawlers, set Disallow paths, and add a sitemap URL — free online robots.txt generator.

🌐 IP & Regex Validator

Validate a single IPv4 or IPv6 address format, or test any custom regex against text — free online IP address validator.

⚙️ .htaccess Generator

Generate Apache .htaccess rules for redirects, HTTPS enforcement, caching, and CORS. Build .htaccess files visually — free online generator.

🎨 CSS Gradient Generator

Create CSS gradient backgrounds visually. Generate linear, radial, and conic gradients with a live preview and copy-ready CSS code — free online tool.

🟦 CSS Box Shadow Generator

Generate CSS box shadows visually with X/Y offset, blur, spread, color, and inset controls. Copy production-ready CSS code — free online tool.

🔮 Glassmorphism CSS Generator

Generate glassmorphism UI effects with CSS backdrop-filter, blur, transparency, and border. Visual builder with copy-ready code — free online tool.

📸 Code to Image

Convert code snippets to shareable PNG images with syntax-colored text and a choice of 4 editor themes — free online code-to-image tool.

✍️ CSS Text Shadow Generator

Generate CSS text-shadow effects visually with live preview — free online CSS text shadow tool.

⬛ CSS Border Radius Generator

Generate CSS border-radius values for rounded corners with a visual builder. Create asymmetric rounded shapes and copy the CSS — free online tool.

🎨 Color Shades Generator

Generate 9 lighter tints and 9 darker shades from any base color, plus the base itself. Click any swatch to copy its hex code — free online color palette generator.

🔵 CSS Filter Generator

Generate CSS filter effects for images: blur, brightness, contrast, grayscale, sepia, hue-rotate, and more. Live preview with copy-ready CSS — free online.

About Developer Tools

32 developer utilities designed to slot into real workflows without friction. Format and validate JSON, XML, SQL, YAML, and HTML. Encode, decode, hash, and convert data strings. Test regex patterns and generate UUIDs, meta tags, and CSS. All tools process data locally — nothing is logged, cached, or transmitted to any server.

Also explore:

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Frequently Asked Questions

Do these developer tools send my code or data to a server?

No. Every tool on this page processes data entirely in your browser using JavaScript. Your code, tokens, keys, data strings, and inputs are never transmitted anywhere. Nothing is logged.

Which standards do these tools follow?

All tools follow the relevant published standard: URL encoding follows RFC 3986, Base64 follows RFC 4648, UUIDs follow RFC 4122, regex uses ECMAScript 2023 spec, JWT follows RFC 7519, and hash generation uses FIPS PUB 180-4 via the Web Cryptography API.

Can I use the output of these tools in commercial projects?

Yes. These are utility tools and their output carries no licensing restrictions. You are free to use results — formatted JSON, encoded strings, generated UUIDs, hashes — in any project, commercial or personal.

Do these tools work with large inputs?

Yes. Most tools handle several megabytes of input without issues. Very large files (10 MB+) may take a few extra seconds on lower-powered devices. Closing unused browser tabs frees up memory for better performance.