The sentence decides what a word means.
Select an unfamiliar word on any page and right-click. Clutio reads the sentence and the page around it, then shows what the word means right there — with an example and a translation. The word is saved with the sentence it came from.
- free lookups a day — Groq free tier, your own key
- 1,000
- interface languages
- 7
- servers we run
- 0
배noun
In this sentence
ship — a vessel that carries people or goods on water
Translation
When a big ship came into the harbor, people gathered.
Dictionary senses
- 1.belly, stomach
- 2.ship, boat
- 3.pear
- 4.times, -fold
The life of one word
Four stages an unfamiliar word goes through inside Clutio. The first is the example above.
Ask where you’re reading
No tab switching. Select the word, right-click, choose “I don’t know...”. The word and the sentence it sits in go straight from your browser to the AI you picked, and the meaning appears on the page you were reading.
- What’s sent
- 배“항구에 큰 배가 들어오자 사람들이 모여들었다.”
- Where it goes
- The AI you picked — Groq (default) · OpenAI · Anthropic
- What it skips
A Clutio server— there isn’t one
Kept with its sentence
There’s no save button. Each word goes into your vocabulary with its meanings, examples and the sentence where you met it. The vocabulary lives only in this browser’s IndexedDB — export it to CSV whenever you want a backup.
배ship, boat
“항구에 큰 배가 들어오자 사람들이 모여들었다.”
경제economy
“한국의 경제는 빠르게 성장하고 있다.”
기술technology
“첨단 기술이 발전하여 생활이 편리해졌다.”
Brought back before you forget
Spaced repetition (SM-2 style) picks the words that are due. The sentence you saved comes back with the word blanked out, and you type the answer. Review on consecutive days and your streak grows.
Fill the blank
항구에 큰 …가 들어오자 사람들이 모여들었다.
배CheckCorrect
Checked on paper
Turn your words into A4 study sheets and tests as PDFs. A test has two parts — write the word from its meaning, then fill the blank in an example — and recently saved words come up more often.
Vocabulary Test
Part 1. Vocabulary Study
1.economy
Part 2. Example Practice
2. 첨단 …이 발전하여 생활이 편리해졌다.
Advanced technology has made life more convenient.
Why Clutio?
There are plenty of translators. Here’s what’s different, in four words.
- Context문맥
It reads the sentences around the word and picks the meaning that fits.
UsuallyTranslate a word on its own and you get a list of senses — picking the right one is your job.
With ClutioThe word travels with its sentence. You see the meaning in context first, the general senses below.
- Privacy기록
Your vocabulary stays in your browser.
UsuallyTranslation history often piles up in a service account or on a server.
With ClutioVocabulary, study history and API keys live only in IndexedDB and chrome.storage. Only a lookup sends the word and its sentence — straight to the AI you picked.
- Flow흐름
You never leave the page you’re reading.
UsuallyCopy → translator tab → paste → copy into a word list → back to the original tab.
With ClutioSelect → right-click. Lookup and save happen in one step.
- Cost비용
The default experience is free.
UsuallyGood translation and vocabulary tools often charge a subscription.
With ClutioThe default engine runs on Groq’s free tier (openai/gpt-oss-20b, 1,000 requests a day, 30 a minute). No card. Add a Claude or ChatGPT key only if you want to.
Three reading scenes
The same moment, before and after Clutio, side by side.
A university student reading papers
Until now
When an unknown word turns up
- 1Copy the word
- 2Open a translator tab
- 3Paste → translate
- 4Copy it into a word list by hand
- 5Go back to the paper
With Clutio
With Clutio
- 1Select the word
- 2Right-click → Clutio
- 3Meaning in context + saved automatically
- 4Keep reading
Get started in 3 minutes
All you need is a free Groq key. No card required.
30 sec
Add to Chrome
- Open Clutio in the Chrome Web Store
- Click “Add to Chrome”
- The setup guide opens when it’s installed
2 min
Get a free Groq key
- Sign up at console.groq.com — phone verification only, no billing
- API Keys → Create API Key
- Copy the key starting with gsk_ (it’s shown once)
- Paste it into the setup guide
New accounts allow every model by default. Only if a lookup fails with “model not allowed” (403), open Settings → Limits → Model Permissions and allow openai/gpt-oss-20b.
Right away
Select while you read
- Select an unfamiliar word or phrase
- Right-click → “I don’t know... (Translate with Clutio)”
- Once you see the meaning, it’s saved to your vocabulary
Estimated cost by AI engine
| Engine | Per lookup (est.) | Per month (est.) |
|---|---|---|
| GPT-OSS 20BDefaultGroq | Free | Free |
| Qwen 3.6 27BStrong multilingualGroq | Free | Free |
| GPT-5 nanoOpenAI · Your key · billing required | $0.0002 | $0.18 |
| GPT-4.1 nanoOpenAI · Your key · billing required | $0.0005 | $0.45 |
| GPT-4.1 miniOpenAI · Your key · billing required | $0.0010 | $0.90 |
| GPT-5 miniOpenAI · Your key · billing required | $0.0010 | $0.90 |
| Claude Haiku 4.5Anthropic · Your key · billing required | $0.0030 | $2.70 |
| GPT-4.1OpenAI · Your key · billing required | $0.0050 | $4.50 |
| GPT-5.1OpenAI · Your key · billing required | $0.0050 | $4.50 |
| GPT-5.2OpenAI · Your key · billing required | $0.0080 | $7.20 |
| Claude Sonnet 4.5Anthropic · Your key · billing required | $0.0090 | $8.10 |
| Claude Opus 4.5Anthropic · Your key · billing required | $0.0150 | $13.50 |
Groq’s free tier is 1,000 requests a day and 30 a minute per key. Paid engines are rough estimates using the per-token rates the extension uses and assuming about 1K tokens per lookup; actual charges follow each provider’s pricing.
Frequently asked questions
The questions we hear most before people install.
Is Clutio really free?
Yes. The default engine runs on Groq’s free tier (openai/gpt-oss-20b): 1,000 requests a day and 30 a minute on your own Groq key. Signing up needs phone verification only — no card. You can add a ChatGPT or Claude key for different quality, but it’s optional. (Groq retired Llama 3.1 8B and Llama 3.3 70B in August 2026; existing settings move to gpt-oss-20b automatically.)
Are my translations stored on a server?
No. Clutio has no server of its own. Your vocabulary, study history and API keys stay in your browser (IndexedDB and chrome.storage). There is exactly one path out of the browser: when you look a word up, the word and its sentence go directly from your browser to the AI provider you chose (Groq, OpenAI or Anthropic). We never see that content.
How do I get an API key?
Sign up at console.groq.com (phone verification), then open API Keys → Create API Key. A key starting with gsk_ is shown once — copy it and paste it into Clutio’s setup guide. New accounts allow every model by default, so there’s no permission step. Only if a lookup fails with “model not allowed” (403), open Settings → Limits → Model Permissions and allow openai/gpt-oss-20b.
How is it different from Google Translate?
Three things. 1) You look words up where you’re reading — select and right-click, no tab switching. 2) It reads the sentence the word sits in and shows the meaning in that sentence first. 3) Each word is saved with its sentence and flows into review, study sheets and tests.
What languages are supported?
The interface and results are available in 7 languages: Korean, English, Japanese, Chinese, Spanish, French and German. Because an AI does the reading, you can look up words in sentences written in other languages too.
How does the vocabulary work?
Every word you look up goes into your vocabulary automatically — there’s no save button. Click the extension icon to search and open entries. The review screen turns your saved sentences into fill-in-the-blank questions, and you can generate A4 study sheets and tests as PDFs or export everything to CSV.
Do you support browsers other than Chrome?
Chrome and Chromium-based browsers (Edge, Brave, Opera and others) are supported today. Firefox and Safari may come later.
Next time a word stops you, select it and right-click.
A free Groq key is all it takes. No card, no server.
30-sec install · 2-min key · ready to read