Cookie Preferences

Our own cookies

• mf_sid — essential. An httpOnly signed session cookie that keeps your anonymous session and usage quotas working while you use the tools. It holds no personal data and the site cannot function without it.
• mf_locale — preference. Remembers the language you picked (or the one first detected for you) so the site doesn’t ask again.

Your light/dark theme choice is not a cookie — it lives in your browser’s local storage. Clearing it simply resets the theme to match your device.

Advertising and analytics cookies

These are set by third parties when you load a page, and they are how the site is paid for and measured. The privacy policy explains what each provider does with the data.

• Google AdSense serves the ads and sets advertising cookies, including IDE on the doubleclick.net domain, which is used to select and measure ads.
• Google Analytics 4 sets _ga and _ga_… to count visits and tell repeat visits apart.
• Microsoft Clarity sets _clck and _clsk, plus MUID, CLID and related identifiers on Microsoft domains. Clarity records session replays — mouse movement, clicks and scrolling — and builds heatmaps so we can find broken and confusing interfaces.

What we still do not do

• No cookie of ours identifies you personally — there are no accounts to attach
• Your uploaded files are never sent to any advertising or analytics provider
• We do not sell your personal data

Controlling these cookies

Every browser can block or delete cookies, either for all sites or for this one, in its privacy settings; blocking the advertising and analytics cookies above leaves every tool on the site fully usable, while blocking mf_sid will stop uploads from working. You can also manage what Google shows you in My Ad Center. Questions: privacy@compresskits.com.

September 9, 2026: this page previously said the site used only two first-party cookies and no advertising cookies. That was inaccurate — the providers above were already running. The list now matches what the site actually sets.