18 languages · Free · No account needed

Learn a language
while you browse

Seep quietly replaces words on any webpage with their translation. Read normally — absorb a new language without thinking about it.

Add to Chrome — it's free See how it works
nytimes.com/world
Seep

Scientists discover new approach to renewable energy storage

Researchers at MIT have made a significant découverte in the field of clean énergie, announcing a breakthrough that could changer how we store power from solar and wind sources. The new technologie uses an innovative approach to battery design that increases capacité capacity → capacité French by up to 40% while reducing production coût. This development could prove essentiel in accelerating the global transition to sustainable énergie.

How it works

Three steps, zero effort

No flashcard sessions. No dedicated study time. Just read the web like you normally would.

1

Pick your language

Choose from 18 languages in the popup. Switch anytime with one click.

2

Browse normally

Words on every page are quietly replaced with their translation as you read.

3

Hover to check

Forgot what a word means? Hover to see the original, or click to hear it spoken.

Languages

18 languages, one extension

From European to Asian languages — including Dutch, Arabic, and everything in between.

SpanishSpanishEspañol
FrenchFrenchFrançais
GermanGermanDeutsch
ItalianItalianItaliano
PortuguesePortuguesePortuguês
DutchDutchNederlands
SwedishSwedishSvenska
NorwegianNorwegianNorsk
DanishDanishDansk
PolishPolishPolski
RussianRussianРусский
JapaneseJapanese日本語
KoreanKorean한국어
MandarinMandarin中文
HindiHindiहिन्दी
ArabicArabicالعربية
TurkishTurkishTürkçe
GreekGreekΕλληνικά
Difficulty levels

Learn at your own pace

Start gentle or go full immersion. Seep adapts the vocabulary and frequency to match your level.

🌱

Beginner

15% of words replaced

Everyday nouns, verbs, and colors. The words you'll use every day.

huis agua rouge Hund giorno
🌿

Intermediate

25% of words replaced

Emotions, abstract ideas, and richer vocabulary for real conversations.

rêve vrijheid sueño avontuur
🌳

Advanced

40% of words replaced

Sophisticated vocabulary for those seeking near-fluency through immersion.

effimero medeleven парадокс
Features

Everything you need, nothing you don't

🔊

Click to hear

Click any translated word to hear it spoken aloud in English.

🎯

Smart frequency

Frequency scales automatically with your difficulty — gentle for beginners, immersive for advanced.

⌨️

Keyboard toggle

Press Alt+E to instantly switch Seep on or off on any page.

🔒

Fully private

Everything runs locally. No data leaves your browser, no account required.

⚡

Works everywhere

News, Reddit, Wikipedia — Seep works on any webpage you visit.

🌐

RTL support

Arabic renders correctly right-to-left, with proper text direction.

Start learning today.
For free.

Add Seep to Chrome and start absorbing your new language on the next page you open.

Add to Chrome — it's free