Extract text from legacy browser files (COOKIE)
To convert COOKIE browser files to another format, you need Internet Explorer or other Web software.
To convert other file formats to the "Browser Session Data File" file type, you need software like Internet Explorer or a similar tool.
The .cookie file extension represents two distinct formats: a deprecated web browser cookie file used by legacy Microsoft Internet Explorer, or a serialized cookie jar created by the Python requests library. In both cases, the file stores active web session states, authentication tokens, and user preferences. Modern web development has completely abandoned standalone .cookie files. Browsers today, such as Google Chrome, utilize SQLITE databases to secure web sessions. This makes the legacy .cookie format nearly impossible to read or migrate without custom parsing scripts. Python cookie jars are heavily serialized, meaning they require a dedicated Python environment to deserialize before any text becomes readable. This is a severe disadvantage for developers who need to quickly inspect stored session data or migrate it to an API testing tool. Furthermore, storing raw session data in these files is a critical security risk; anyone possessing the file can potentially execute a session hijack.
To make this data readable or reusable, you must convert .cookie files to TXT (plain text) or JSON (JavaScript Object Notation). Converting to JSON organizes the raw data into logical key-value pairs, making it highly compatible with modern web applications and tools like Postman.
This file format is exceptionally difficult to open or convert because standard web converters cannot parse legacy Microsoft structures or Python-specific serialization protocols. Often, only the original legacy software or a custom script can properly read or export the data. However, convert.guru provides a realistic workaround. Just drag and drop your file to identify the format, view the internal text structure, and convert it when possible. If our analysis detects a supported underlying text or embedded format, viewing or conversion may still be possible.
Convert.Guru analyzes your COOKIE file, detects the exact format, and lets you read the text inside.
Users also converted TXT, COOKIES, JSON, ZIP, TMP, HTA, PARTIAL, TOKEN, JWT and HEADER files.
If you want to convert COOKIE file to JSON, TOKEN, JWT or HEADER, you can use Internet Explorer or similar software from the "Web Session Data Storage" category. In the File menu, look for Save As… or Export….
To convert files to COOKIE, try Internet Explorer or another comparable tool in the "Web Session Data Storage" category.
The history of Convert.Guru began over 25 years ago in California with Tom Simondi’s file-format database. A former contributor to Space Shuttle development and a software pioneer of the 1980s, Simondi established a trusted resource for file type analysis that was even referenced by Microsoft Windows XP. Today, we use modern technology to process and convert thousands of file formats while continually improving our COOKIE converter.