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Developer Tools

Essential coding utilities — QR codes, encoding, color conversion, JSON formatting & security tools.

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All Developer Tools

Lightweight, fast, browser-based utilities for developers and designers

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QR Code Generator

Generate QR codes with logo embedding, custom colors, error correction levels, and download in PNG/SVG. Canvas-based rendering.

Logo EmbedCustom ColorsPNG/SVGError Correction
Generate QR
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Base64 Encoder/Decoder

4-mode Base64 operations: encode/decode text, encode images to data URLs, decode Base64 to file. btoa/atob API with file input.

Text EncodeImage to URLFile Decode4 Modes
Encode/Decode
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URL Encoder/Decoder

Encode/decode URLs with encodeURIComponent, encodeURI, form encoding modes. Parse URL parameters, validate URLs, live preview.

4 ModesURL ParseParam ExtractValidate
Encode URL 🔥 Hot
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HEX ↔ RGB ↔ HSL Color Converter

Full color format conversion: HEX, RGB, HSL, CMYK. Color picker, 4 preset palettes (Tailwind/Material/CSS/Islamic), gradient builder, WCAG contrast.

HEX/RGB/HSL/CMYKTailwind PaletteWCAG CheckGradient
Convert Colors
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JSON Formatter & Validator

Format, validate, minify, and beautify JSON. Tree view, syntax highlighting, error detection with line numbers, and copy to clipboard.

Format/MinifyValidateTree ViewError Line
Format JSON
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Password Generator

Generate cryptographically secure passwords. Custom length, character sets, exclude ambiguous chars, strength meter, bulk generate up to 50.

Crypto-SecureCustom RulesStrength MeterBulk Generate
Generate Password
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Typing Speed Test

Live 1-minute typing test with real-time WPM tracking, accuracy percentage, and shareable results. Multiple difficulty levels.

Real-time WPMAccuracyShare Results3 Levels
Test Typing Speed

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Frequently Asked Questions

Are the generated passwords truly secure?
Yes! Our password generator uses the Web Crypto API (window.crypto.getRandomValues) which provides cryptographically secure random numbers. This is the same level of randomness used by professional security tools. Passwords are generated entirely in your browser and never transmitted.
What is the difference between encodeURI and encodeURIComponent?
encodeURI encodes a complete URL, preserving characters like /, ?, #, & that have special meaning in URLs. encodeURIComponent encodes a URL component (like a query parameter value), encoding ALL special characters including those preserved by encodeURI. Use encodeURIComponent when encoding values that will be inserted into URLs.
Can I embed a custom logo in QR codes?
Yes! Our QR Generator supports logo embedding. Upload any image and it will be placed in the center of the QR code with a white background pad. We automatically set error correction to 'H' (30%) when a logo is added to ensure the QR code remains scannable even with the logo overlay.
Does HEX-RGB converter support alpha transparency?
Yes! Our color converter supports 8-digit HEX codes (#RRGGBBAA) for alpha transparency, as well as rgba() and hsla() CSS functions. The WCAG contrast checker uses the opacity-adjusted color for accurate accessibility compliance testing.