Stack Trace Formatter
Stack Trace Formatter
Paste a raw stack trace from any runtime — Node.js, Python, Java, .NET, Go, Rust, PHP, or Ruby — and get a structured, colour-coded frame breakdown with file, function, and line details.
Resolve minified stack trace with a source map
Parses Node.js, Python, Java, .NET, Go, Rust, PHP, and Ruby stack traces. Supports multi-exception traces. Upload a matching .js.map file to resolve a minified stack trace's original file/line/function names via source-map symbolication.
Stack Trace Formatter
Paste a raw stack trace from any runtime — Node.js, Python, Java, .NET, Go, Rust, PHP, or Ruby — and get a structured, colour-coded frame breakdown with file, function, and line details.
Common uses
- Parse a Node.js TypeError stack trace
- Format a Python traceback
- Inspect a Java NullPointerException
Frequently asked questions
Can I use Stack Trace Formatter to parse a Node.js TypeError stack trace?
Yes. Stack Trace Formatter can parse a Node.js TypeError stack trace, directly in your browser.
Can I use Stack Trace Formatter to format a Python traceback?
Yes. Stack Trace Formatter can format a Python traceback, directly in your browser.
Can I use Stack Trace Formatter to inspect a Java NullPointerException?
Yes. Stack Trace Formatter can inspect a Java NullPointerException, directly in your browser.
Is my data uploaded to a server?
No. This tool runs entirely in your browser — your input is processed locally on your device and is never uploaded or stored on a server.