âš™ï¸ Developer Tools

33 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.

ðŸ“‹ JSON Formatter

Format, validate, and minify JSON instantly in the browser. Syntax highlighting, error detection, and tree view — no data sent to any server.

ðŸ” Base64 Encoder / Decoder

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

ðŸ” Regex Tester

Test and debug regular expressions in real time with match highlighting. Supports JavaScript, Python, and PCRE regex — free online regex tester.

ðŸ”— 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.

ðŸ”¢ Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-512, and SHA-3 hashes from text or files. All hashing runs in your browser — data never leaves your device.

ðŸ†” UUID Generator

Generate UUID v4 (random), v1 (timestamp), and v5 (namespace) identifiers instantly. Generate single or bulk UUIDs and copy with one click — free.

ðŸŽ¨ HEX to RGB Converter

Convert HEX color codes to RGB, HSL, and CMYK values instantly. Reverse RGB to HEX conversion included — free online color format converter.

â° Timestamp Converter

Convert Unix timestamps to human-readable dates and vice versa. Supports milliseconds, seconds, and all time zones — free online timestamp converter.

ðŸŽ¨ Color Code Converter

Convert between all CSS color formats: HEX, RGB, RGBA, HSL, HSLA, and named colors. Instant conversion with visual preview — free online tool.

ðŸ·ï¸ 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.

ðŸ”‘ JWT Decoder

Decode and inspect JWT (JSON Web Tokens) to view header, payload, and expiry. Verify signatures and check token validity — free, no data sent to servers.

ðŸ’¾ Text to Binary

Convert text to binary code and binary back to text instantly. See ASCII decimal and hex values alongside binary output — free online converter.

ðŸ”’ HTML Encoder / Decoder

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

ðŸ—„ï¸ SQL Formatter

Format and beautify SQL queries instantly. Supports MySQL, PostgreSQL, SQL Server, and Oracle syntax. Minify SQL for production — free online.

ðŸ“„ XML Formatter

Format, validate, and minify XML with syntax highlighting. Convert XML to JSON and JSON to XML — free online XML formatter and validator.

ðŸ“„ YAML to JSON

Convert YAML to JSON and JSON to YAML instantly with validation and error detection. Format both outputs with syntax highlighting — free online converter.

ðŸ“¦ JavaScript Minifier

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

ðŸ“¦ CSS Minifier

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

âœï¸ Markdown Previewer

Preview Markdown with live rendering as you type. Supports GitHub Flavored Markdown, custom CSS themes, and HTML export — free online Markdown previewer.

ðŸ“„ JSON to YAML

Convert JSON to YAML with proper indentation and comment support. Reverse convert YAML to JSON — free online bidirectional converter with validation.

â±ï¸ Cron Expression Parser

Parse and validate cron expressions in plain English. Build cron schedules visually and generate expressions for any interval — free online cron parser.

ðŸ“¦ HTML Minifier

Minify HTML to remove whitespace, comments, and optional tags for smaller page payloads. Safe minification with configurable options — free online.

ðŸ¤– Robots.txt Generator

Generate a robots.txt file for your website. Configure crawler access rules and sitemap URL with a visual builder — free online robots.txt generator.

ðŸŒ IP & Regex Validator

Validate IP addresses (IPv4 and IPv6) and test CIDR notation. Batch validate lists of IPs and check ranges — free online IP address validator.

âš™ï¸ .htaccess Generator

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

ðŸŽ¨ 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.

ðŸŸ¦ 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.

ðŸ”® Glassmorphism CSS Generator

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

ðŸ“¸ Code to Image

Convert code snippets to beautiful shareable images. Choose themes, fonts, and window styles — perfect for social media and documentation — free online.

âœï¸ CSS Text Shadow Generator

Generate CSS text-shadow effects visually. Create glows, outlines, 3D effects, and stacked shadows with live preview — free online CSS text shadow tool.

â¬› 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.

ðŸŽ¨ Color Shades Generator

Generate complete color shades and tints from any base color. Get 10 shades from lightest to darkest — free online color palette generator for Tailwind CSS.

ðŸ”µ 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

33 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:

ðŸ“ Text Tools (22)ðŸŒ Web & SEO (21)

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.