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Have questions or need assistance? Our team is ready to help you with any inquiries about PDF4Locker, PDF password protection, or technical support.
We typically respond to all inquiries within 24-48 hours during business days.
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Quick answers to common questions about PDF4Locker
Yes! PDF4Locker is completely free to use with no hidden costs, subscriptions, or premium features. All functionality is available to everyone at no charge.
Absolutely. Your files are processed entirely in your browser using client-side encryption. We never upload, store, or access your files on our servers.
There is no file size limit! Since all processing happens locally in your browser, you can protect PDFs of any size without restrictions.
Yes! PDF4Locker works on all modern devices including desktops, laptops, tablets, and smartphones with any up-to-date browser.
No. Since we don't store your passwords or files, forgotten passwords cannot be recovered. Please keep your password safe and secure.
PDF4Locker works with all modern browsers including Chrome, Firefox, Safari, Edge, and Opera. Make sure your browser is up to date.