Free Online Tools

Powerful free tools for developers, marketers, and business owners to help you work smarter.

Developer

Format, validate, and minify JSON data with syntax highlighting and error detection.

Test website performance with simulated Lighthouse audit scores.

Simulate sending webhooks and inspect payloads, headers, and responses.

Generate mock JSON data for users, products, and posts for testing.

Calculate return on investment for your marketing campaigns with detailed breakdowns.

Build UTM-tagged URLs to track campaign performance in Google Analytics.

Generate SEO-optimized meta tags for title, description, Open Graph, and Twitter cards.

Generate schema.org JSON-LD markup for rich snippets in search results.

Estimate the cost of building a website based on features and complexity.

Create simple SVG logos with customizable text, colors, and shapes.

Generate strong random passwords with customizable length and character types.

Calculate equated monthly installments for loans with interest and amortization.