Every legacy codebase has one third-party script that is a single line of text. Reconstructing what it does from that line is archaeology. Beautifying it first turns archaeology into reading.
Paste minified JavaScript and it comes back indented and spaced out, with the call structure visible. You still have to trace the logic yourself, but at least the function boundaries are no longer a guessing game.
Try it now: open the free tool, runs 100{b8b7921c843ac9e5edcbca134af59decad3ed340e0e3b2e6c286158f277affea} in your browser.
Bottom line: unminify before you debug.
Your turn: use the tool free here, no signup, nothing leaves your device.
How do you use JavaScript Beautifier?
Open the JavaScript Beautifier in your browser (Restructure unformatted JS into readable style). Type or paste your input, adjust the options, and copy the result. Everything runs locally on your device with no account and nothing stored, so the three steps below take seconds even for confidential work.
- Paste the data or snippet you want to process.
- Run the tool and watch the output update.
- Copy the result for use in your own code.
Try JavaScript Beautifier free. It opens right in your browser.