You're already reading. Might as well learn Spanish.

Sideload Spanish sneaks vocabulary into the pages you browse every day. No app, no streaks, no guilt — just words showing up where you least expect them.

How it works

1. Browse

Open any page you normally read. That's it.

2. Read

English words become Spanish. Hover to peek.

3. Level Up

Master a tier, harder words unlock. 3,600+ and counting.

Features

• 📊 Progressive tiers — A1 → C1, unlocked as you learn
• 🇪🇸 Smart articles — "the house" → "la casa", not "el casa"
• 🔍 Struggling detection — Words you keep missing get highlighted
• 🎚️ Density control — Choose how many words get replaced

Your browsing is yours. Period.

No account required. No telemetry. No analytics. Your vocabulary progress lives in your browser — we literally cannot see what you're learning.

Built by LoadLang. Open source on GitHub.

Take your words with you

Learning on your laptop and your desktop? Sync keeps your progress in lockstep — end-to-end encrypted, because we meant it about privacy.

€5/month

• Multi-device sync
• E2E encrypted (we can't read your data)
• Cancel anytime, your words stay yours