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JSON 整形/圧縮/検証

JSON formatter: paste JSON to beautify, minify and validate with highlighting and error location for dev debugging. Supports batch processing and one-click copy.

使い方

JSON を貼り付け、整形/圧縮/検証モードを選択。結果はリアルタイムに更新。

Overview

JSON Formatter, Minifier & Validator is a Developer tool. JSON formatter: paste JSON to beautify, minify and validate with highlighting and error location for dev debugging. Supports batch processing and one-click copy. 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

  • Daily use of JSON Formatter, Minifier & Validator: Paste JSON and choose format, minify or validate. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use JSON Formatter, Minifier & Validator offline or on poor network — all calculations stay local and private.
  • Convert between CSV/JSON/Markdown
  • Test regex with highlights

How to use

  1. 1 Paste JSON and choose format, minify or validate..
  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

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

FAQ

Why invalid?
Trailing commas, single quotes or BOM often cause it.
Offline?
Yes, parsing is local.
How is JSON Formatter, Minifier & Validator different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “json formatter, json validator” 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.
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