Cookies Converter – Convert Cookies to JSON, Netscape & TXT Formats

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Our Cookie Converter makes cookie format conversion straightforward. Whether you have cookies.txt or JSON exports, you can convert, validate, and download in seconds.

This guide explains cookie formats (Netscape, JSON, TXT), how to convert between them safely, common errors, and quick validation tips.

TXT-style cookie lists are simple name=value pairs or custom delimited rows. Our tool handles these variants and maps them to Netscape or JSON as needed.

Different tools and libraries expect different cookie formats. That mismatch creates import errors, scraping failures, or broken sessions. A reliable Cookie Converter removes format friction so your workflows keep running.

Supported Input & Output Formats

  • Accepted inputs: Netscape cookies.txt, JSON array exports, or simple name=value lists
  • Output formats: Netscape (cookies.txt), JSON array, and plain TXT
  • Encoding: UTF-8 preferred
  • Line endings: LF or CRLF supported
  • No account required; files not stored permanently

Note: Always validate the converted file in your target tool. The converter aims to preserve essential fields but some custom tools may expect extra fields.

  • Preserves important fields like domain, path, expiry, and secure flags
  • Fixes encoding and delimiter problems automatically
  • Copy-paste friendly and provides downloadable output
  • Useful for developers, QA, and automation scripts

The process is simple and works on mobile and desktop. Use the converter on our website to convert or download cookie files in your desired format.

Step-by-Step Conversion Guide

  1. Paste Sample: If you don’t have a file, paste a small sample of cookie lines or JSON array.
  2. Fix Issues: Use the validation hints to fix missing fields or encoding problems.
  3. Export: Export the converted result or copy it to clipboard for quick use.
  4. Load Into Script: Use the converted cookies in your automation or browser tool.
  5. Repeat: Repeat for other formats as needed.
  • Use UTF-8 encoding to avoid character corruption.
  • For long cookie values, avoid copying from rendered HTML — use raw export files.
  • If converting from cookies.txt, check for header lines and remove them if present.
  • Test converted output with a small sample before running large imports.
Common Error Solution
Extra comment lines in cookies.txt Remove comment lines before converting
Missing name/value field Ensure each cookie has `name` and `value`
Encoding issues Ensure UTF-8 encoding before conversion
Invalid JSON structure Fix JSON syntax or paste a valid JSON array
Delimiter mismatch in TXT Use standard name=value with one cookie per line
Incorrect expiry format Convert expiry to Unix timestamp or remove if not needed
  • Exported Cookie Files: Use browser or extension exports (cookies.txt or JSON) for accuracy.
  • Programmatic JSON: Ensure your JSON objects have correct fields before converting.
  • Best Practice: Always validate converted output in a sandboxed environment before production use.
  • Preview converted output before downloading
  • Test with a small sample cookie file first
  • Keep backups of originals before converting
  • Use UTF-8 encoding to prevent character corruption
  • Validate domain/path fields if sessions fail after import

Final Checklist Before Using Converted Cookies

  • ✓ Input format correctly detected
  • ✓ Output format chosen (Netscape / JSON / TXT)
  • ✓ Name and value fields preserved
  • ✓ Domain and path fields present if required
  • ✓ Encoding: UTF-8
  • ✓ Test in a non-production environment first

Frequently Asked Questions

How do I convert cookies.txt to JSON?

Upload or paste your cookies.txt file, choose JSON as output, and click Convert. The tool maps each line to a JSON object with name and value fields and includes other available fields.

Can I convert JSON cookies to Netscape format?

Yes — pick Netscape output and the tool writes cookies in the standard line-based Netscape format.

What if my JSON is invalid?

The tool will show a validation error and suggest fixes; correct the JSON structure and retry.

Is there an API for programmatic conversion?

At present the web UI is the primary interface. For automation, consider using server-side scripts that mimic the tool’s mapping logic.