Life & fun · alternatives · 2026
24 alternatives to Underline
Expand your vocabulary while you browse the Internet
Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Underline launched in 2022; newer entries below may have overtaken it.
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Learn your Duolingo vocabulary while browsing the web
2023 · duoninja.com · its alternatives →
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UnderlineMe▲132Highlight, bookmark & organize research from any site
2020 · underlineme.com · its alternatives →
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Learn the words you translate with one click
2019 · chromewebstore.google.com · its alternatives →
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Linguix▲246Check grammar instantly in real-time on your favorite sites
2020 · linguix.com · its alternatives →
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Hi HN, Just wanted to share a tool i've been working on to help with my own study routine. It’s a browser extension called Lingoku. The idea is simple: we spend hours browsing the web in English every day. This tool replaces some of the english words with Japanese vocabulary based on your japanese level (Similar to Toucan, but with a better user experience). It’s basically an attempt to make the "i+1" method actually passive, you understand the sentence because it's mostly english, but you pick up Japanese words naturally from the context. It uses an LLM in the backend to make sure the…
Dec 2025 · lingoku.ai · its alternatives →
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Hi HN, For over two years I've been working on an App to learn languages (currently French, Italian and Spanish), together with my partner, a language teacher. I think it is finally ready to share with this community! The idea is to introduce vocabulary and grammar whilst you read eBooks in your own language. I've found that it is easier to remember vocabulary 'in context' and with regular repetition. Plus you don't have to carve out dedicated time for language learning. Other apps require you to build a habit around various exercises or ‘games’, whereas lots of people already read books.…
2024 · glossarie.app · its alternatives →
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Learn vocabulary while surfing the web
2019 · burningvocabulary.com · its alternatives →
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Burning Vocabulary is a new innovative Chrome extension to expand your vocabulary fast and effectively. Mark and save the words you don
2020 · burningvocabulary.com · its alternatives →
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18 languages, works offline with audio & images
2023 · topstuff.page.link · its alternatives →
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Hi! Wanted to share the project I really wanted to have. TLDR; this app lets you create your own list of words and you get a Duolingo-like experience (kind of, still needs a lot of features) practicing those words in their context. My English is not the best but not the worst either. But I realized I can't boost it up after a certain level! In my belief, in order to truly learn a language, you need to be exposed to that language often. Vocabulary is the key factor here if you really want to improve in any language. My experience is that when I read a book to improve my English vocabulary, I…
2025 · github.com · its alternatives →
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AtomicVocab▲91Expand your vocabulary, one tab at a time
2023 · chromewebstore.google.com · its alternatives →
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Climb▲80Browser extension to define words and learn with GIFs
2021 · climb.app.link · its alternatives →
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FlipWord▲214Intelligently integrate language learning into web browsing
2017 · flipword.co · its alternatives →
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2016 · alpharabi.us · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →