Privacy policy
Covers the verklein.nu website, the verklein.nu Chrome extension and the verklein.nu WordPress plugin. Last updated: 4 November 2026.
In short
- Your files are only processed to make them smaller or convert them, and thrown away right after. We do not store them and do not look at them.
- No account and no analytics. The website shows ads from Google; Google only sets cookies for them with your consent. The Chrome extension has no ads, cookies or trackers.
- Your IP address is briefly kept in memory to prevent abuse.
- We sell nothing and share nothing with advertisers or data brokers.
- The WordPress plugin runs entirely on your own website and sends us nothing.
Who we are
verklein.nu is a service of BijBijker, Binnenweg 21, 8347 JM Eesveen, the Netherlands, registered with the Dutch Chamber of Commerce under number 91254353. We are the controller for the processing described here. Contact: verklein@bijbijker.nl.
What data, why and for how long
| Your files (images, PDFs) | To perform the operation you choose. They are sent to our server over an encrypted connection (HTTPS), processed in memory (PDFs briefly in a temporary folder while they are worked on) and deleted as soon as the result is sent back. Every file is checked for viruses and harmful content on our own server; it is not sent to third parties for this. Metadata such as GPS location is removed from the result by default. |
|---|---|
| IP address | To apply limits per visitor (files per minute and per day) and to block connections that repeatedly send harmful files. These counters exist only in memory and expire after at most 24 hours. |
| Refused files | When a file is refused by the security check we log the IP address, a fingerprint (SHA-256) of the file, its size and the reason. Not the file itself. We keep this for at most 30 days to investigate attacks. |
| Technical server logs | Error messages without the content of your files, at most 30 days. |
The legal basis is our legitimate interest (Article 6(1)(f) GDPR): providing the service you ask for and keeping it safe and available.
What stays in your own browser
The website keeps your settings, profiles, theme and whether you closed the language notice in localStorage and sessionStorage, and your latest results (at most 30, together at most 150 MB) in IndexedDB, so they survive a reload. The extension keeps its settings in chrome.storage. This data never leaves your device and we cannot access it. Remove it with the buttons in the tool, by removing the extension or by clearing the site data in your browser. These are not cookies and are not used to track you.
The Chrome extension
- The extension only processes files you put in yourself: by choosing, dropping or pasting them, or by right-clicking an image or PDF link and choosing “Shrink this image / PDF with verklein.nu”. Those files go to the verklein.nu server and are handled as described above.
- When you right-click an image, the extension briefly keeps the address (URL) of that image in chrome.storage.session to fetch it; it is removed right after and in any case when you close the browser. The address is not sent to us, only the image itself.
- To fetch an image from another website the extension may ask for access to that one website. That access is only used to fetch the image you clicked, without sending cookies or login details.
- On verklein.nu itself (and only there) the extension exchanges your saved profiles with the website, so they are the same in both places. This happens in your browser; nothing is sent to our server.
- When you click “Scan this page” (or choose “Scan images on this page with verklein.nu” in the right-click menu), the extension looks once at which images are on that one tab: their address, size in pixels, file size and whether it is a WordPress site. That list stays in the side panel, is not stored and is not sent to us or anyone else. Only an image you then add to the list yourself goes to the server as described above. For images on another server the extension can, after you click “Allow”, ask that server for the file size.
- Apart from that the extension does not read the content of web pages, collects no browsing history, uses no analytics and loads no remote code.
- In short, the extension only handles website content: the images and PDFs you choose, and the list of images of a page you scan yourself. It collects no personally identifiable information such as name or email address, no health, financial or authentication information, no personal communications, no location, no web history and no user activity (clicks, keystrokes, scrolling).
- Retention: your files are deleted from the server as soon as the result has been sent back; the address of an image you right-clicked right after it has been fetched. Your settings and profiles stay in your browser until you clear them or remove the extension.
- We do not sell data from the extension and do not transfer it to anyone, except to our hosting provider who runs the server for us (see “Third parties”).
- The use of information by the extension adheres to the Chrome Web Store User Data Policy, including the Limited Use requirements. Data is only used for the feature you see, never sold, never used for advertising or creditworthiness, and never read by people.
The WordPress plugin
- The plugin “verklein.nu – WebP & AVIF” converts images on the server of your own WordPress site. Your images, your media library and your database never leave that server and are not sent to verklein.nu, BijBijker or anyone else.
- The plugin makes no connection to verklein.nu or any other external service: no licence check, no statistics, no tracking, no ads and no remote code. Only the status check in the admin requests a test file from your own website (as WordPress’ own Site Health does), to see whether WebP/AVIF are served correctly and whether the backup folder is closed off. With “Clear caches” on, the plugin asks the cache plugins you installed yourself to clear their cache; what they do then is covered by their own terms.
- So we receive no data from your site or its visitors. You (the administrator of that site) are responsible for the processing on your own site.
- Settings, statistics and the backups of your originals live in your own WordPress installation. When you delete the plugin, settings and restore data are kept by default for a later reinstall, unless you choose in the settings to remove everything.
Advertising (Google AdSense)
To keep verklein.nu free we show ads from Google AdSense on the home page, never inside the tool itself or in the extension. Google (Google Ireland Ltd.) is responsible for these itself and may use cookies and similar technologies to show and measure ads and, if you allow it, to personalise them. On your first visit Google asks for your consent; without consent you only get non-personalised ads. You can change your choice at any time with Cookie settings at the bottom of the page. Google receives your IP address, browser details and the page address, never your files. More: how Google uses information from sites that use its services and your ad settings at Google. The legal basis for personalised ads is your consent (Article 6(1)(a) GDPR).
- Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website and other websites.
- Google’s use of advertising cookies enables it and its partners to serve ads based on your visits to this and/or other sites.
- You can opt out of personalised advertising at Ads Settings, and out of other vendors’ cookies at youronlinechoices.eu or aboutads.info.
- Google may process data in the United States. Google is certified under the EU-US Data Privacy Framework and also uses the European Commission’s standard contractual clauses.
- Which cookies these are and how long they stay is in the cookie policy.
Third parties
Our server runs at OVH SAS (OVHcloud) in France, with whom we have a data processing agreement; they have no access to the content of your files. The font (Ubuntu) is served from our own server: the website loads no fonts or scripts from Google Fonts or other external services, apart from the ads described above. For ads: see above. We share nothing else with third parties unless the law requires it.
Your rights
You have the right to access, correct, erase, restrict and object, and to data portability. Since we do not keep your files or any account, there is usually nothing to request; log lines can only be found if you give us the IP address and time. Email verklein@bijbijker.nl; we reply within one month. If you disagree with how we handle your data, you can complain to the Dutch Data Protection Authority, the Autoriteit Persoonsgegevens.
Security
All traffic is encrypted. Uploads are checked before they are processed, processing runs in an isolated container without a writable disk, and results are always rebuilt instead of copied.
Changes
If anything changes in how we handle data, we update this page and the date at the top. Major changes to the extension are also mentioned in its Chrome Web Store description.