CODE CRUSADER

Logic, decoded.

Your intelligent problem-solving companion for code, mathematics and writing. Find errors, understand why they happen, and solve them.

Code Crusader — your logic-solving companion

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Code scans run

Σ

0

Problems solved

✎

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Texts checked

Choose a tool ✥ drag cards to reorder

How it works

1

Pick a tool

Choose Debug chamber, Logic solver, or Grammar guard from the sidebar.

2

Paste your content

Drop in code, an equation, or a paragraph — or try one of the built-in examples.

3

Get instant feedback

See issues, fixes, and steps immediately — everything runs on-device.

Color scheme

Pick an accent color — it updates buttons, links, highlights, and the hero everywhere in the app.

⚔️ Debug chamber

Paste your code, run a scan, and get a personalized set of things to study based on what came up.

Your code

Results

↗

Run a scan to see results here.

Σ Logic solver

Type an expression to calculate, or an equation with "=" to solve for x — see the steps behind the answer.

Enter a problem

Try an example

Solution

Σ

Enter a problem and press Solve.

✎ Grammar guard

Paste text to catch punctuation slips, spelling mistakes, mixed-up words, run-ons, and other common writing issues — with one-click fixes for spelling.

Your text

0 words

Feedback

✎

Run a check to see feedback here.