What are the benefits of Cookie Parser?

Quickly turns raw cookie text into a structured debug view.. Automatically decodes URL-encoded values so you can paste real HTTP headers directly.. Makes cookie attributes easier to inspect and compare.. Keeps sensitive header data local because parsing stays in the browser..

Is Cookie Parser free?

Yes, it is completely free to use, and no registration is required. Tool processing happens entirely in your browser, and your input content and uploaded files are not sent to a server. Our first-party improvement metrics use no cookies, visitor IDs, or session IDs and store only normalized page paths and daily counts for fixed event IDs.

Cookie Parser

Turn raw cookie header text into a structured view for debugging.

デバッグユーティリティ

Cookie解析

Cookie ヘッダーや Set-Cookie 行を JSON として見やすく展開します。

0 件

Cookie 入力

解析結果 JSON

`Cookie:` でも `Set-Cookie:` でも貼り付ければ自動判定して JSON 化します。

About Cookie Parser

Cookie Parser is a browser-side debugging tool for turning raw `Cookie:` headers and `Set-Cookie:` lines into readable JSON. It is useful when you are inspecting authentication flows, session issues, API responses, CDN behavior, browser storage, or test logs and need a quick structured view of cookie names, values, and attributes.

Manually splitting cookie text is error-prone, especially when you want to spot flags such as `HttpOnly`, `Secure`, `SameSite`, `Path`, `Domain`, or `Max-Age` across multiple lines. This tool detects whether the pasted text looks like a Cookie header or one or more Set-Cookie directives, then formats the result immediately as JSON so you can inspect it, copy it, or share it in documentation.

URL-encoded values (like `%20` for space or `%2F` for slash) are automatically decoded, allowing you to paste real HTTP headers directly. Because everything runs in the browser, it is convenient for sensitive debugging sessions where you do not want to send header data to external services. The tool also supports RFC 6265 quoted values, normalizes attribute names to standard casing, and recognizes newer attributes like Priority.

How to use Cookie Parser

Paste a `Cookie:` header or one or more `Set-Cookie:` lines.
Review the parsed JSON structure for names, values, and attributes.
Copy the result for debugging notes, logs, or test-data preparation.

Benefits of Cookie Parser

Quickly turns raw cookie text into a structured debug view.
Automatically decodes URL-encoded values so you can paste real HTTP headers directly.
Makes cookie attributes easier to inspect and compare.
Keeps sensitive header data local because parsing stays in the browser.