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Định dạng và nén JavaScript

JavaScript formatter: beautify indentation, minify size and safely handle strings and comments with custom indent for development, with one-click copy and offline.

Cách sử dụng

Dán mã JS, chọn "Định dạng" hoặc "Nén", kết quả và sự thay đổi dung lượng sẽ hiển thị theo thời gian thực.

Overview

JavaScript Formatter & Minifier is a pro-dev tool that JavaScript formatter: beautify indentation, minify size and safely handle strings and comments with custom indent for development, with one-click copy and offline. It runs 100% in your browser with no upload, so you get instant results with privacy. Whether you need a quick answer or batch processing with precise control, you can enter, validate and export in seconds. The UI is responsive on mobile, tablet and desktop and supports one-click copy.

Use cases

  • Convert between CSV/JSON/Markdown
  • Escape code for string literals
  • Format and validate JSON
  • Test regex with highlights
  • Use it to cross-check “js格式化、js压缩” in reports, docs or APIs to avoid manual conversion errors

How to use

  1. 1 Paste code/data
  2. 2 Pick action and options
  3. 3 Fix highlighted errors
  4. 4 Copy or export

Highlights

  • Local & private: processing stays in your browser
  • Live validation with tolerant parsing
  • One-click copy and export for docs, code or sheets
  • Batch and offline support under poor network

Notes

  • Disable live validation for large files
  • Strict JSON disallows comments/trailing commas
  • Watch greedy vs lazy regex

FAQ

Why invalid?
Trailing commas, single quotes or BOM often cause it.
Offline?
Yes, parsing is local.
How is JavaScript Formatter & Minifier different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “js格式化、js压缩” and one-click copy for reuse.
Can I use results in official reports?
Use it as a working draft and cross-check with authoritative sources; keep the exported log and parameters for traceability.
Tip：Tip: Bookmark this page or pin the tab; find related tools via categories and search (convert → calculate → export).
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All calculations run locally in your browser; nothing is uploaded.