Launching today

PasteCheck

Launching today

Paste your code. See your errors. No setup, no signup.

2 followers

Paste your code. See your errors. No setup, no signup.

2 followers

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PasteCheck is a free, mobile-friendly code linter that runs in your browser. Paste JavaScript, TypeScript, Python, or HTML and get instant, tappable error highlights with plain-English descriptions. No install. No account. Just paste and check.

Free

Launch tags:Productivity•Developer Tools

Launch Team / Built With

Mintlify — Knowledge infrastructure for AI agents

Knowledge infrastructure for AI agents

Promoted

Maker

📌

Hey PH 👋 I'm Charles, I built PasteCheck because I kept switching between my code editor and AI tools just to catch basic syntax errors and the back-and-forth was killing my flow. PasteCheck is a single-purpose tool. Paste your code, get instant highlighted errors and warnings, tap any highlight for a plain-English explanation. No login, no install, no friction. Supports JavaScript, TypeScript, Python, and HTML — including mixed-language detection inside HTML files. It's free and always will be in its core form. Would love to hear what languages or features you'd want next. 🙏

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24h ago