JSON 格式化 + 正則測試 | Free JSON Formatter & Regex Tester

JSON 格式化／壓縮／驗證 + 正則測試。全部在你瀏覽器本機運算，不會上傳資料。

Pattern

Flags

測試字串

🎧

Soundcore Q20i 降噪耳機寫 code 專注神器

含 Amazon 聯盟連結，透過連結購買我們可能獲得回饋，不影響你的價格。As an Amazon Associate we earn from qualifying purchases.

FAQ · 常見問題

我的資料會被上傳嗎？ / Is my data uploaded?

不會，JSON 格式化與正則測試全部在你瀏覽器本機執行。No; JSON formatting and regex testing run entirely in your browser.

支援哪些正則 flags？ / Which regex flags?

支援 g/i/m/s/u 等標準 JavaScript 正則旗標。Supports standard JS flags like g, i, m, s, u.

免費嗎？ / Is it free?

免費。Free.

更多免費工具 · More tools

🖥️ LLM VRAM 🧮 Token 成本 🖼️ 出圖尺寸 📝 Prompt 庫 🍅 番茄鐘 🛠️ JSON·Regex

About these free JSON & Regex tools

Two everyday developer tasks in one page: format and validate JSON, and test regular expressions against sample text with live highlighting. Everything runs in your browser, so even sensitive payloads stay on your machine.

How to use

Paste JSON to pretty-print and validate it — syntax errors are pinpointed.
Switch to the regex tester and enter your pattern and flags.
Type or paste sample text to see matches highlighted in real time.

Why use it

Quickly spotting a misplaced comma in JSON or confirming a pattern before shipping saves real debugging time. Doing it locally means you can safely test data you would never paste into an unknown online service.

FAQ

Is my JSON or test data uploaded?

No — formatting and matching run entirely in your browser.

Which regex flavor is used?

JavaScript's regular-expression engine, matching what runs in browsers and Node.js.

Can it minify JSON too?

Yes — it can both pretty-print and compact JSON.

☕ 請我喝咖啡 Ko-fi