Syntaxerror: unexpected end of json input
The syntaxerror: unexpected end of json input is an error message you’ll encounter when you are working with JavaScript. If you are encountering this error right now and you’re confused about how …
Python & JavaScript SyntaxError Reference — 48+ Parsing & Syntax Fixes (2026)
itsourcecode.com hosts 48+ documented fixes for SyntaxError messages in both Python and JavaScript — the error class raised when the parser encounters code it can’t interpret. Unlike runtime errors, syntax errors are caught before code executes. Most come from missing/extra punctuation, mismatched quotes, missing colons (Python), mixed module/script boundaries (JavaScript ES Modules), or wrong Python version targeting. Browse the fixes below by language.
What is a SyntaxError?
A SyntaxError is raised when the language parser fails to understand your code — meaning the code is structurally invalid before it can run. In Python, SyntaxError is detected at import or first execution; in JavaScript, by the browser or Node.js when the file is loaded. The error message usually points to the line and column where the parser got confused. Often the actual mistake is on the LINE BEFORE the one reported (a missing comma, paren, or colon).
How to debug any SyntaxError in 4 steps
- Look at the line BEFORE the reported error. Parsers often only realize something’s wrong on the next line. A missing closing paren on line 10 is often reported as “unexpected token” on line 11.
- Match all opening/closing pairs.
(with),[with],{with},"with",'with'. Most syntax errors are one missing or extra character. Editor bracket-matching helps a lot. - Check your Python or Node version. Modern features (walrus operator
:=, f-strings, match statement, ESMimport.meta) require a specific minimum version. If the syntax is fine but you’re on an old runtime, the parser doesn’t recognize it. - For JSON errors — validate with a JSON formatter. “Unexpected token” in JSON usually means trailing commas, single quotes (JSON requires double), or unescaped characters. Paste into jsonlint.com.
Featured SyntaxError fixes by language
🐍 Python — invalid syntax / EOF / EOL
- SyntaxError: invalid syntax (Troubleshooting Guide)
- SyntaxError: unexpected EOF while parsing
- SyntaxError: EOL while scanning string literal
- SyntaxError: unexpected character after line continuation
🐍 Python — statement structure
- Expected ‘except’ or ‘finally’ block
- Multiple exception types must be parenthesized
- Generator expression must be parenthesized
- ‘return’ outside function
- Positional argument follows keyword argument
- f-string expression part cannot include a backslash
- future feature ‘annotations’ is not defined (Python 3.7+)
🟦 JavaScript — unexpected token
- Uncaught SyntaxError: Unexpected number
- SyntaxError: Unexpected token ‘export’
- Uncaught SyntaxError: missing ) after argument list
- Uncaught SyntaxError: Invalid left-hand side in assignment
- Uncaught SyntaxError: Invalid or unexpected token
- Uncaught SyntaxError: Invalid shorthand property initializer
- Uncaught SyntaxError: Unexpected end of input (in promise)
🟦 JavaScript — ES Modules & modern syntax
- SyntaxError: Cannot use ‘import.meta’ outside a module
- Missing initializer in const declaration
- Unexpected reserved word ‘await’ (outside async)
- ‘import’ and ‘export’ may appear only with sourceType: ‘module’ (ESLint)
📦 JSON parsing errors
Related error categories
SyntaxError is one of 10 hubs in our Python & JavaScript error reference cluster — 980+ documented fixes total:
- TypeError Reference — 220+ Python & JS TypeError fixes
- ModuleNotFoundError Reference — 198+ Python import errors
- AttributeError Reference — 173+ “object has no attribute X” fixes
- ValueError Reference — 100+ pandas/NumPy/sklearn fixes
- ImportError Reference — 67+ “cannot import name X from Y” fixes
- NameError Reference — 49+ “name X is not defined” fixes
- RuntimeError Reference — 49+ PyTorch/CUDA/async runtime errors
- ReferenceError Reference — 34+ JavaScript “is not defined” fixes
- HTTP Error Reference — 35+ HTTP status code fixes (4xx, 5xx)
- Python Tutorial — beginner-to-intermediate Python lessons
About this SyntaxError reference
Built since 2015 by PIES Information Technology Solutions, Binalbagan, Negros Occidental, Philippines. Every post comes from a real error encountered in production. Used by 12,000+ developers monthly.
Syntaxerror: unexpected character after line continuation character
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Syntaxerror: future feature annotations is not defined
In this article, we will show you how to fix the syntaxerror: future feature annotations is not defined in Python. Since we need to fix this error, we just need to have …
Syntaxerror: ‘return’ outside function
In this article, we’ll walk you through how to fix the Python syntaxerror: ‘return’ outside function. This syntax error you’ll face when you’re running your code in Python. If this …
Syntaxerror: positional argument follows keyword argument
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Syntaxerror: unexpected token export
The syntaxerror: unexpected token export usually happens when the program’s module may not be compatible with the program’s environment. In this article, you will learn what this error is all about and …
Syntaxerror: eol while scanning string literal
Today, we are going to deal with Python syntaxerror: eol while scanning string literal error message. If you are stuck with this error, this article is for you. Continue reading to have …
Syntaxerror: unexpected eof while parsing
Are you trying to figure out the solution for Python syntaxerror: unexpected eof while parsing? But then, you’re confused about how to resolve it and having a hard time fixing it? Well, …
Syntaxerror: invalid syntax (A Troubleshooting Guide)
Syntaxerror: invalid syntax is a common error while running your code in Python. But how does this error occur in your code and how to fix it? In this article, we’ll …
Frequently Asked Questions
Why does the SyntaxError point to a line that looks fine?
The parser realizes something is wrong only when it hits a token that does not fit — but the actual mistake (missing paren, missing colon, unmatched quote) is usually on the LINE BEFORE. Always look at the line above the reported error first.
What does "Unexpected token 'o' in JSON at position 1" mean?
The string you tried to parse as JSON is not actually JSON — it starts with "o" which suggests you are parsing the string "object Object" (literally) instead of an actual JSON string. Check what you are passing to JSON.parse(). Common cause: JSON.parse(myObject.toString()) when myObject is already an object — drop the .toString() or use JSON.stringify() first.
What does "Cannot use 'import.meta' outside a module" mean?
import.meta only works in ES modules. To use it: (1) Add "type": "module" to your package.json, OR (2) rename the file to .mjs, OR (3) use a bundler that handles ES module syntax. For Node.js, if you want CommonJS instead, use __dirname / __filename directly (no import.meta needed).
What does "Unexpected token 'export'" mean in Node.js?
You are running ES module syntax in a CommonJS-mode Node.js file. Either set "type": "module" in package.json, use a .mjs extension, or convert to CommonJS: module.exports = ... instead of export .... Same fix applies to import statements.
What does "EOL while scanning string literal" mean?
You opened a string with " or ' but never closed it before the end of the line. Add the closing quote. If the string is supposed to span multiple lines, use triple-quotes (""" or ''') in Python, or template literals (backticks) in JavaScript.
Can I catch SyntaxError with try/except?
Only for dynamic code — strings passed to eval(), exec(), or compile(). SyntaxError in normal source code happens at parse time, before any code in that file runs, so a try/except inside the same file cannot catch it. To detect dynamic syntax errors safely: try: compile(source, '<string>', 'exec') except SyntaxError as e: ...
How often is this SyntaxError reference updated?
New posts are added weekly. Existing posts are revised when major language versions ship syntax changes (Python 3.12 match statement, ES2024). Last refreshed: May 2026.