I built a free mobile-friendly code error checker — PasteCheck

I got frustrated constantly copy-pasting broken code into AI and getting inconsistent results. So I built PasteCheck.

You paste JavaScript, Python or HTML and every error gets highlighted instantly. Tap any highlight to see what the issue is. No sign …


This content originally appeared on DEV Community and was authored by Charles Blackwood

I got frustrated constantly copy-pasting broken code into AI and getting inconsistent results. So I built PasteCheck.

You paste JavaScript, Python or HTML and every error gets highlighted instantly. Tap any highlight to see what the issue is. No sign up, completely free, works well on mobile.

Would love feedback from developers:

(https://www.pastecheck.co.uk)


This content originally appeared on DEV Community and was authored by Charles Blackwood


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Charles Blackwood | Sciencx (2026-05-18T20:30:15+00:00) I built a free mobile-friendly code error checker — PasteCheck. Retrieved from https://www.scien.cx/2026/05/18/i-built-a-free-mobile-friendly-code-error-checker-pastecheck/

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" » I built a free mobile-friendly code error checker — PasteCheck." Charles Blackwood | Sciencx - Monday May 18, 2026, https://www.scien.cx/2026/05/18/i-built-a-free-mobile-friendly-code-error-checker-pastecheck/
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Charles Blackwood | Sciencx Monday May 18, 2026 » I built a free mobile-friendly code error checker — PasteCheck., viewed ,<https://www.scien.cx/2026/05/18/i-built-a-free-mobile-friendly-code-error-checker-pastecheck/>
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Charles Blackwood | Sciencx - » I built a free mobile-friendly code error checker — PasteCheck. [Internet]. [Accessed ]. Available from: https://www.scien.cx/2026/05/18/i-built-a-free-mobile-friendly-code-error-checker-pastecheck/
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" » I built a free mobile-friendly code error checker — PasteCheck." Charles Blackwood | Sciencx - Accessed . https://www.scien.cx/2026/05/18/i-built-a-free-mobile-friendly-code-error-checker-pastecheck/
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" » I built a free mobile-friendly code error checker — PasteCheck." Charles Blackwood | Sciencx [Online]. Available: https://www.scien.cx/2026/05/18/i-built-a-free-mobile-friendly-code-error-checker-pastecheck/. [Accessed: ]
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