One tool, one price

Yes, completely. Alteri processes your PDFs entirely in your browser — your files are never uploaded to our servers. We literally can’t see your documents. Once you close the tab, they’re gone.

Everything. Text editing, annotations, freehand drawing, signatures, page reordering, files up to 10 MB, instant downloads, and every future feature we ship — all for a single one-time payment. No subscriptions, no renewals.

Most PDFs, yes. Alteri detects existing fonts and lets you edit text in-place while preserving the original style. If a font isn’t available, we match it with the closest alternative. Heavily secured or encrypted PDFs may have restrictions set by their creator.

It means you pay once and have access forever — no renewals, no subscriptions, no surprise charges. It also includes all future features we ship. We’d never gate new tools behind a new purchase for lifetime customers.

We accept all major credit and debit cards (Visa, Mastercard, Amex) as well as PayPal and Apple Pay. All payments are processed securely via Stripe.

Yes. If you’re not satisfied, contact us within 7 days of purchase at hello@alteri.com and we’ll process a full refund — no questions asked.