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HTTP ステータスコード検索

HTTP status codes reference: look up 1xx-5xx meanings, scenarios and troubleshooting with all common codes for development and ops, with one-click copy and offline.

使い方

ステータスコード（100〜599）を入力すると、名前、分類、説明を表示。下に完全な参照表も掲載。

Overview

HTTP Status Codes is a Developer tool. Look up 1xx-5xx meanings, scenarios and troubleshooting with all common codes for development and ops, 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

  • Daily use of HTTP Status Codes: Type a status code (100-599) to see its name, category and description. A full reference table is below. — enter and get instant results without manual lookup.
  • One-click copy keeps results ready to save, check or share with family and pros.
  • Use HTTP Status Codes offline or on poor network — all calculations stay local and private.
  • Convert between CSV/JSON/Markdown
  • Escape code for string literals

How to use

  1. 1 Type a status code (100-599) to see its name, category and description. A full reference table is below..
  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 HTTP Status Codes different?
It runs locally with a focus on speed and privacy, plus tolerant parsing for “http status, 404” 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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