What is a cookie?
A cookie is a small text file that a website stores in your browser. It can hold a preference (like your chosen theme), a session identifier (to keep you signed in), or a tracking ID (used by advertising networks to recognise you across sites). Cookies expire after a set time or when you clear them manually.
Alongside cookies, modern browsers also expose "storage" APIs like localStorage, sessionStorage and IndexedDB. Legally, these are treated similarly to cookies under the ePrivacy Directive and this policy covers them too.
Does PDFslime set any first-party cookies?
No. PDFslime does not set a single first-party cookie. Everything the site itself needs to remember is stored in your browser's localStorage, which never leaves your device.
First-party localStorage keys used by PDFslime
| Key | Purpose | Retention |
|---|---|---|
pdfslime-theme | Remembers whether you picked light or dark mode. | Until cleared |
pdfslime-consent | Records your response to the cookie/consent banner so we don't ask on every visit. | Until cleared |
pdfslime-editor-rail-expanded | Remembers whether you had the Editor's left tool rail expanded or collapsed. | Until cleared |
These entries are technically strictly necessary or functional: they store your own preferences on your own device, are not sent anywhere, and are not used to identify or track you.
Third-party cookies
Third-party cookies are set by domains other than pdfslime.app. On PDFslime, two categories of third parties may be involved:
1. Content Delivery Networks (no cookies used)
Your browser fetches JavaScript libraries and web fonts from public CDNs (jsDelivr, Cloudflare cdnjs, Google Fonts). These requests do not set cookies on the PDFslime origin. The CDN operators may log the IP address and user agent of the request for security and abuse-prevention purposes — see our Privacy Policy for links to their policies.
2. Google AdSense (only with your consent)
To keep PDFslime free, we may show advertisements delivered by Google AdSense. If — and only if — you accept the consent banner (or you are outside a jurisdiction that requires explicit consent), Google will set the following cookies in your browser under the PDFslime domain:
| Cookie | Set by | Purpose | Typical expiry |
|---|---|---|---|
__gads | googlesyndication.com | Measures ad impressions and prevents the same ad appearing too often to one user. | 13 months |
__gpi | googlesyndication.com | Stores an ad personalisation ID used by Google's Privacy & messaging. | 13 months |
__eoi | googlesyndication.com | Extended opt-in ID for personalised advertising in some regions. | 13 months |
IDE | doubleclick.net | Used by Google's DoubleClick for reporting, measurement and personalised advertising. | 13 months |
id, DSID, FLC, AID, TAID | doubleclick.net / google.com | Cross-site tracking cookies used by Google's ad ecosystem for personalisation, measurement and fraud detection. | Session – 2 years |
NID | google.com | Stores Google account preferences including ads personalisation. | 6 months |
The above list is illustrative — Google may add, remove or rename cookies over time. Refer to Google's cookie policy for the current authoritative list.
Cookie categories at a glance
| Category | Used on PDFslime? | Consent required? |
|---|---|---|
| Strictly necessary — required for the site to function (e.g. remembering your consent choice) | Yes (via localStorage) | No — permitted under GDPR without consent |
| Functional / preference — remember your settings (theme, panel layout) | Yes (via localStorage) | No — data never leaves your device |
| Analytics / performance — measure site usage | None | — |
| Advertising / targeting — personalise ads across sites | Only if you consent (Google AdSense) | Yes — explicit consent required in EEA/UK/CH |
How to manage your cookie choices
You have several ways to control cookies on PDFslime:
- Change your consent on this site. Use the button below to re-open the consent banner and change or withdraw your choice at any time.
- Opt out of Google's personalised advertising in one place: adssettings.google.com. This applies wherever you use Google ads, not just PDFslime.
- Opt out at industry-wide sites: aboutads.info/choices (US) or youronlinechoices.eu (EU).
- Block or delete cookies in your browser. Every major browser lets you view and remove cookies stored by any site:
- Use "Do Not Track" or Global Privacy Control. Where legally required, we and our advertising partners honour GPC signals as a valid opt-out of the sale/sharing of personal information.
If you block advertising cookies, ads may still be shown but will be non-personalised (contextual only). Blocking all cookies will not affect the core PDF tools — everything continues to run entirely in your browser.
Do Not Track
PDFslime itself does not track you, so there is nothing to disable. Google's ad ecosystem largely does not respond to legacy DNT headers but does honour the modern Global Privacy Control signal in supported jurisdictions.
Changes to this policy
We may update this Cookie Policy from time to time — for example, if Google adds a new advertising cookie or if we add new functionality. When we do, we will update the "Last updated" date at the top of this page. Material changes will be highlighted with an on-site notice.
Related
See our Privacy Policy for the full picture of how data flows on PDFslime, or get in touch if you have a question this page doesn't answer.