JavaScript Pretty Print: Format, Compare, and Export Code
JavaScript Pretty Print formats pasted or dropped JavaScript for easier reading and review. Choose the Readable, Compact, or Expanded preset, then set indentation and other available options. The tool uses Prettier and shows syntax-highlighted output with line numbers beside the original. Copy the result or export it as HTML or Markdown-fenced text.
JavaScript Pretty Print is a browser-based JavaScript pretty printer for making code easier to read and review. It is distinct from the Beautifier and uses Prettier under the hood. Paste or drop JavaScript to see a formatted version with syntax highlighting and line numbers, displayed alongside the original.
Choose the Readable, Compact, or Expanded preset, then pick the indentation and options you need. These controls shape the formatted output; the tool also lets you copy the result or export it as HTML or Markdown-fenced text. The side-by-side view helps you inspect the original and printed versions without losing sight of the source.
JavaScript remains JavaScript after pretty printing, but its presentation is adjusted to make the code easier to scan. Consistent indentation can make generated or unfamiliar files more reviewable and reduce whitespace noise when you are looking at code changes. The presets offer different formatting starting points for tasks such as code review, debugging, or preparing a snippet to share.
JavaScript Pretty Print is free and runs entirely in your browser. Your input is processed on your device; it is not uploaded, stored, or sent to a server. After the page has loaded, the tool works offline, so you can format code without an active connection. It can help developers and DevOps engineers who want a quick way to inspect, format, compare, or share JavaScript.
Step 1: Paste or drop your JavaScript into the tool. It accepts JavaScript input for formatting.
Step 2: Choose a preset: Readable, Compact, or Expanded. Each gives you a one-click formatting starting point.
Step 3: Pick the indentation and any available options. These settings let you adjust how the formatted output is presented.
Step 4: Review the result beside the original. Syntax highlighting and line numbers make the formatted JavaScript easier to scan.
Step 5: Copy the formatted output or export it as HTML or Markdown-fenced text for sharing.
Use case: Make an unreadable, machine-generated JavaScript file easier to review before you commit it. Consistent formatting helps you focus on the code rather than its layout.
Use case: Check JavaScript written by someone else against the style you need to follow. Use a preset and indentation settings to produce a clearer view.
Use case: Reduce whitespace noise in a diff by formatting JavaScript consistently before comparing changes. This makes substantive edits easier to spot.
Use case: Format a snippet before adding it to a bug report or code review. Syntax highlighting and line numbers help readers navigate the code.
Use case: Check whether JavaScript input parses cleanly and locate the line where a problem occurs. This can help you narrow down a formatting or syntax issue.
Use case: Compare the original and formatted JavaScript side by side when reviewing generated or unfamiliar code. The two views make changes in presentation easier to inspect.
Use case: Export formatted JavaScript as HTML or Markdown-fenced text when you need to include a readable code example in shared materials.