Free tools for a lean website

Free tools to make a website lighter without lowering its quality. No account, nothing is kept or sold.

• Check a page
  Paste a page address. You get fixes to copy and paste.
• Make images lighter
  Your images get lighter on your own device. They are never uploaded.
• Color contrast
  Two colors, a contrast ratio, and a CSS fix if needed.
• Guide: a website that uses less water
  Simple steps, explained one by one.
• A more confident look at this device
  Local checks in your browser. Not an antivirus. Nothing is sent.

These tools measure real page weight or real contrast. They do not make up CO₂ or water figures.