Calculate matching width or height to keep the same aspect ratio. Ideal for resizing videos, images, and layout elements. Try it now with instant visual feedback.
Test contrast ratio between foreground and background colors. Ensure WCAG AA/AAA accessibility compliance with live preview and pass/fail indicators.
Convert pixel values to rem based on root font size and vice versa. Includes live preview and ready-to-use CSS code snippet for your responsive designs.
Generate responsive CSS clamp() values for typography and spacing. Preview how the font size looks across mobile, tablet, and desktop screen widths with copy-ready CSS output.
Calculate ideal CSS line-height based on your font size. Supports unitless, px, rem, and em units. Includes visual preview and copyable CSS output.
Calculate and preview column widths and span values in CSS Grid. Separate output for container and child elements with editable column and gap controls.
Convert CSS units interactively with support for px, rem, em, %, vh, and vw. Includes live preview, custom root font and viewport size, and CSS output.
Just changing width or height can break your visual. With ToolMateX, you get perfectly scaled results every time — and you can see what it'll look like.
Tired of bloated tool websites with 10 ads per click? This platform is built for speed, simplicity, and reliability. Whether you're debugging JSON or testing colors, we’ve got your back.
All tools run right in your browser, fast, reliable, and available whenever you need them. No ads, and nothing to install.
Most of my tools work directly in your browser without needing a server. Perfect for fast workflows (even if you’re offline).
Made by someone who actually uses these tools daily. It’s fast, clean, and made with your workflow in mind, not corporate KPIs.