Free Online Tools

Measure your website's Core Web Vitals and performance metrics with Lighthouse. Get detailed analysis of LCP, CLS, TBT, and INP with actionable AI-powered recommendations.

Analyze SSL/TLS certificates, check security configurations, and identify potential vulnerabilities in your website's HTTPS setup.

Convert images between formats including HEIC, WebP, PNG, JPG, and more. Resize images, adjust quality, and strip metadata for privacy.

Compress JPG, PNG, WebP and HEIC images by quality or to a target size in KB. Batch up to 50 images and download a ZIP. 100% browser-based, no uploads.

Combine PDF files into one in the order you choose, with optional page ranges per file. Works with password-protected PDFs. 100% browser-based, no uploads.

Convert video files between formats including MP4, WebM, AVI, MOV, WMV, and MPG. Adjust quality, resolution, and frame rate for optimal output.

Beautify minified JSON for readability or minify JSON to reduce file size. Includes syntax validation and custom indentation options.

Compare costs across OpenAI, Anthropic, Google, AWS Bedrock, Meta, Mistral, and DeepSeek models. Calculate daily, monthly, and annual LLM costs with growth projections.

Detect AI writing patterns with color-coded highlighting, then rewrite text to sound naturally human. Supports rich text paste from Word and Google Docs.

Check grammar, style, and clarity with detailed correction explanations. Color-coded categories show exactly what to fix and why.