Give your website a free checkup.

Find broken links before your visitors do, and spot missing security settings or gaps in your email setup. There’s help for everyday jobs too, like shrinking a photo or making an invoice. It’s all free, and 9 tools never upload what you give them.

Find your tool Browse all tools

Focused tools: 18
Run in your browser: 9

Open Invoice Studio

See what each tool does for you

Pick a tool to see it in action, then open it and try it on your own website, photos or files.

Illustration of the Image Compressor: a before-and-after slider, compression modes, output formats, and a compressed batch ready to download

Open Image Compressor

Your go-to tools, always close by.

Every tool opens ready to go. Create a free account to pin the ones you use most to your dashboard.

See every tool

Your files stay with you.

9 tools do all their work right in your browser, so your photos, drafts and code stay on your device. The other 9 look up public information for you, like a domain’s records or exchange rates, so those requests go through our server.

In your browser

Public web data

18 tools in three groups

Browse tools by what you want to do

Not sure where to start? See which checks matter for your role, or visit the Knowledge Center for plain-English guides to DNS, redirects, security headers and more.

Websites, email and internet

Code and AI

Everyday tasks

Start with one quick check.

Most tools work right away, without an account. A few in-depth checks, like site crawls and launch checks, ask you to sign in for free and come with a daily allowance.

Browse all 18 tools