Free Developer Tools
That Respect Your Privacy

Beautify, minify, and validate JSON data with syntax highlighting. Detect errors instantly and explore nested structures with our tree view.

Count words, characters, sentences, and paragraphs. Get reading time estimates and analyze keyword density for SEO optimization.

Create customizable QR codes for URLs, text, WiFi networks, vCards, and more. Download in PNG, SVG, or PDF formats.

Generate harmonious color palettes using complementary, analogous, triadic, and split-complementary color theory schemes.

Encode text or files to Base64 and decode Base64 strings back to original content. Perfect for data URIs and API debugging.

Write and preview Markdown in real-time. Export to HTML or copy formatted content for blogs, documentation, and README files.

Generate and decode JSON Web Tokens for authentication. Inspect headers, payloads, and verify signatures easily.

Generate placeholder text for your designs and mockups. Choose between paragraphs, sentences, or words.

Compress JPEG, PNG, and WebP images without losing quality. Adjust quality, resize, and convert formats.

Generate unique UUIDs (v1, v4) for databases, APIs, and applications. Bulk generate up to 1000 at once.

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes from text or files securely.

Test and debug regular expressions with real-time matching, highlighting, and a quick reference guide.

Transform AI-generated text to sound more natural and human-like. Bypass AI detection with smart word replacements and natural sentence structures.

Merge, split, and compress PDF files instantly. All processing happens in your browser - your documents stay private.

Download YouTube video thumbnails in all available resolutions. Get HD, SD, and max resolution thumbnails instantly.

Remove backgrounds from images instantly. Auto-detect or manually pick background colors. Export transparent PNG.

Generate favicons in all sizes from any image. Get Apple Touch Icons, Android Chrome icons, and standard favicons.

Generate SEO meta tags, Open Graph, and Twitter Card tags. Preview how your page looks in search results and social shares.

Crop images into perfect circles for profile pictures and avatars. Adjust size and download in PNG format.

Calculate compound interest with detailed breakdowns. See how your investments grow over time with monthly contributions.

Convert kilograms to pounds and vice versa instantly. Simple, fast, and accurate weight conversion tool.

Convert Markdown files to beautifully formatted PDF documents. Perfect for documentation and reports.

Convert Markdown to Microsoft Word documents (.docx). Preserve formatting and structure.

Calculate monthly mortgage payments with detailed amortization schedules. Compare different loan terms and rates.

Convert Chinese RMB numbers to uppercase characters. Essential for financial documents in China.

Full-featured scientific calculator with trigonometry, logarithms, and advanced mathematical functions.

Convert text to small caps, superscript, and subscript characters. Perfect for unique social media posts.

Compare two texts and highlight differences. Perfect for code reviews and document comparisons.

Convert text to scalable SVG graphics. Choose fonts, colors, and export vector text for any size.

Convert Unix timestamps to human-readable dates and vice versa. Support for multiple timezones.

Convert between different units of measurement including length, weight, temperature, and more.

Generate valid test credit card numbers for development and testing. Supports Visa, Mastercard, Amex, and Discover with Luhn validation.