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Tools

Handy utilities that run right in your browser.

Learn programming step by step, from scratch.

Our tools on your phone, on Google Play.

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Format, validate and minify JSON right in your browser.

Test JavaScript regular expressions and see every match highlighted.

Decode JSON Web Tokens and check when they expire.

Beautify SQL queries for MySQL, PostgreSQL, SQL Server and more.

Compare two texts and see what was added and removed.

Write Markdown and see the result live, then copy the HTML.

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Beginner 8 weeks

Learn programming logic and the core of C++ from scratch.

Beginner 4 weeks

Master formulas, tables and charts to work faster with data.

Beginner 6 weeks

Build and publish a responsive website with HTML, CSS and JavaScript.

We build what our users need. Tell us what would help you.