Search the codex

Find any of the free tools in one place — search by name, description, or category. Everything runs in your browser, no sign-up.

Popular tools

Citation Generator

Build APA, MLA, and Chicago citations in seconds — paste a URL or type it in by hand.

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GPA Calculator

Calculate your semester and cumulative GPA, and plan what you need to hit your target.

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Prompt Simulator

Practice writing better prompts with instant, transparent scoring across real scenarios.

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Search FAQ

How do I search for a tool?

Type at least two characters into the search bar in the header (or the big box above) and matching tools appear instantly. Press Go, or hit Enter, to see the full results page.

What can I search by — just tool names?

Names, descriptions, and categories. Try "gpa" for the GPA Calculator, "cipher" for every cipher tool, or "pdf" for all PDF utilities.

I can't find the tool I need. What now?

Browse the full catalog from the Browse page, or open the menu in the header to see every category.