Free · Open source · Manifest V3

CookieMan — the cookie editor for Chrome

View, edit, import and export cookies from a popup that lists every cookie on the current site, lets you change any attribute, and moves them between tools in six formats — JSON, Netscape cookies.txt, Header String, Set-Cookie and Base64, all auto-detected on paste.

Download & install Online converter
Chrome, Edge and other Chromium browsers Nothing sent to a server ~26 KB download
The CookieMan popup showing live cookies for github.com, with search, add, import and export controls.
Built for cookie work

Everything you need, nothing you don't

Debug an auth flow, flip an A/B variant, move a logged-in session to another profile — the repetitive parts of cookie work, in two clicks.

Live cookie monitoring

Every cookie for the active tab, updated the moment it changes. The toolbar badge keeps the count in view.

Full attribute editing

Name, value, domain, path, expiration, Secure, HttpOnly, SameSite, host-only and partitioned — all editable.

Import with auto-detection

Paste anything. The parser identifies the format, previews what will be written, then applies it.

Export in six formats

Current site or every accessible cookie, converted to the format you need, copied or downloaded.

Instant search

Filter by name, value or domain as you type — useful when a site sets fifty cookies.

Partitioned (CHIPS) aware

Reads and writes the partition key, so third-party cookies under CHIPS behave correctly.

See every feature in detail

Auto-detected on paste

Import without choosing a format first — the parser recognises what you pasted, then exports to any of the six.

Format reference
  • JSON Array
  • JSON Map
  • Netscape cookies.txt
  • Header String
  • Set-Cookie lines
  • Base64
Three steps

From install to first edit in two minutes

  1. 1

    Add the extension

    Install from the zip in about two minutes, or from the Chrome Web Store when the listing is live.

  2. 2

    Open any site

    Click the toolbar icon. Every cookie for that domain is listed, with the count on the badge.

  3. 3

    Edit, import, export

    Change an attribute, paste a session from elsewhere, or export the set in the format you need.

Open the illustrated install guide

No install needed

Free online cookie converter

Have a cookies.txt file that a tool refuses to read? Paste it into the converter and get JSON, a Cookie: header, Set-Cookie lines or Base64 back. It runs entirely in your browser — the page has no upload endpoint to send anything to.

Open the converter Learn the cookies.txt format
Guides

Convert the file for the next tool

Each guide is one job plus the live converter. The longer explainers stay on the blog.

3 min read

curl -b cookies.txt from JSON Export

Turn a Chrome JSON export into the Netscape file curl -b and -c expect: tabs, #HttpOnly_ prefixes, Unix-second expiry and a trailing newline.

curl cookies.txtcurl -b cookies Open the guide
3 min read

Cookie-Editor Alternative for Chrome (MV3)

Cookie-Editor is a cookie inspector. CookieMan is a Manifest V3 editor that imports the same JSON and converts it to cookies.txt, headers or Base64.

Cookie-Editor alternativeCookie-Editor Chrome Open the guide
3 min read

JSON Array vs cookies.txt Field Mapping

Side-by-side mapping of CookieMan JSON Array fields to Netscape cookies.txt. SameSite, partitionKey and store metadata never survive the seven-column file.

JSON vs cookies.txtcookies.txt field mapping Open the guide
3 min read

Playwright storageState to cookies.txt

Paste a Playwright storageState file. The converter unwraps the cookies array, treats expires -1 as a session cookie, and writes Netscape for curl or Chrome JSON.

Playwright storageStatePlaywright cookies.txt Open the guide
3 min read

yt-dlp cookies.txt from Chrome Export

Convert Chrome JSON or a browser dump to the Netscape file yt-dlp --cookies expects, with tabs, Unix seconds and #HttpOnly_ session cookies intact.

yt-dlp cookies.txtyt-dlp --cookies Open the guide
3 min read

Fix: Could not detect cookie format

CookieMan emits this warning when the paste is not JSON, Netscape, Cookie header, Set-Cookie or Base64. Strip the BOM, extract cookie text, then convert.

Could not detect cookie formatcookie format detection failed Open the guide

All conversion guides

Common questions

What is CookieMan?
CookieMan is a free, open-source Chrome extension for viewing, editing, creating, importing and exporting browser cookies. It runs on Manifest V3, keeps all processing on your machine, and reads HttpOnly cookies that page JavaScript cannot see.
Is it free?
Yes — free, MIT-licensed and open source, with no account and no paid tier. See the full feature list.
How do I install it without the Chrome Web Store?
Download the zip, unpack it, open chrome://extensions, enable Developer mode and choose “Load unpacked”. The illustrated install guide walks through every click.
Can I convert cookies without installing anything?
Yes. The online cookie converter runs the same detection and serialisation code in the page. Task-specific walkthroughs live under Guides — curl jars, Playwright storageState, and the exact detection warnings.
Does it work in Microsoft Edge?
Yes. It loads in Chrome, Edge and other Chromium browsers — the install steps are identical, using edge://extensions instead.

Take control of your cookies

Install the extension in about two minutes, or try the converter first — no sign-up either way.

Install CookieMan Open the converter

Free and MIT-licensed · Chrome, Edge and other Chromium browsers · Nothing leaves your machine