Pythonium

About Pythonium

Pythonium's linter is an online tool for checking Python 3 code syntax. It scans pasted, uploaded, or directly entered code and flags syntax errors, indicating the line number and type of error so users can locate and fix problems without a local compiler.

The tool covers common error categories such as incorrect indentation, missing colons, mismatched quotes, misspelled variable or function names, and misuse of operators. It runs in the browser, accepting code via copy-paste, drag-and-drop file upload, or an integrated editor.

A REST API is also available (POST to a checker endpoint) that accepts Python source code and returns a JSON response listing any syntax errors detected, each with a line number and detail message. The page notes the API should be used sparingly.

Key features

• Checks Python 3 syntax and highlights errors with line numbers
• Browser-based, no local compiler or install required
• Supports pasting, drag-and-drop, or direct code entry
• Points to the exact line where a syntax error occurs
• REST API for programmatic Python syntax validation

Frequently asked questions