OldwiseOldwise

Learn or Summarize any text, anywhere.

Select text on any web page, right-click, and Oldwise teaches it or summarizes it with AI, in your own language. Bring your own key, or subscribe and use our built-in AI.

Pricing

Start free with your own key, or subscribe for built-in AI and zero setup.

Free Plan
€0/mo

Bring your own API key (Gemini, OpenAI, DeepSeek, or Claude). Every action, full control, and custom prompts. You manage the key and pay your provider directly.

Add to your browser
Bro plan Bro Plan
€2.99/mo

Monthly access to our built-in AI. Learn or summarize any text in your language, no API key needed. Perfect for daily users and students.

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Compare Free Planyour key Bro Plan€2.99/mo Pro PlanPopular€9.99/mo
AI modelYour own providerAdvanced modelsHigh-level top models
No setup needed×
Answer depthYour choiceConciseFull, detailed
Longest selectionProvider limit500 characters5,000 characters
Custom prompts××
Weekly usageProvider quotaGenerousMuch higher
CostPay your provider€2.99 flat€9.99 flat
Best forTinkerers with a keyDaily users, studentsPower users, code, long texts

Unused weekly credits carry over to the next week (half on Bro Plan, all on Pro Plan), up to 4 weeks. How usage works

Try it yourself

Click a highlighted phrase, then choose what Oldwise should do. This is exactly how it feels on a real page.

Yesterday I tried to apprendre a new language. The tutorial's async/await examples confused me, and later I read that the mitochondria is the powerhouse of the cell.

Pick a highlighted phrase above to begin.

See the difference

The same selection on the Bro Plan (left) and Pro Plan (right). The Bro Plan is fast and focused; the Pro Plan teaches in full with a premium model.

Learn a word · the French verb "apprendre", linguistically

Bro Plan Concise
Oldwise⚙ ×
apprendre

apprendre · verb · 'to learn'

  • Present: j'apprends, tu apprends, il apprend.
  • J'apprends le français. (I am learning French.)
Pro Plan Full lesson
Oldwise⚙ ×
apprendre

apprendre · verb, 3rd group · 'to learn, to teach'

Present

  • j'apprends
  • nous apprenons
  • tu apprends
  • vous apprenez
  • il apprend
  • ils apprennent

Other tenses

  • Passé composé: j'ai appris
  • Imparfait: j'apprenais · Futur: j'apprendrai

In use

  • J'apprends le français. (I am learning French.)
  • Elle m'a appris à nager. (She taught me to swim.)

Understand code · "async/await", technically

Bro Plan Concise
Oldwise⚙ ×
async/await

async/await (JavaScript)

  • Write asynchronous code that reads top to bottom.
  • await pauses until a promise settles.
Pro Plan Full lesson, stronger model
Oldwise⚙ ×
async/await

async / await · asynchronous JavaScript

  • async: marks a function that always returns a promise.
  • await: pauses inside an async function until a promise settles, then yields its value.
  • Why: asynchronous code reads top to bottom instead of nesting callbacks.
  • Errors: wrap awaited calls in try / catch.

Example

const res = await fetch(url);
const data = await res.json();

Summarize a passage · one sentence from an article

Bro Plan Concise
Oldwise⚙ ×
The 1648 Peace of Westphalia ended the Thirty Years' War and redrew Europe.
  • Ended the Thirty Years' War in 1648.
  • Redrew Europe's political map.
Pro Plan Detailed
Oldwise⚙ ×
The 1648 Peace of Westphalia ended the Thirty Years' War and redrew Europe.
  • Event: the Peace of Westphalia, signed in 1648.
  • Ended: the Thirty Years' War.
  • Effect: redrew Europe's borders and balance of power.
  • Legacy: often seen as the start of the modern state system.

FAQ

Quick answers about Oldwise.

What is Oldwise?
A browser extension. Select any text on a web page, right-click, and Oldwise teaches it (Learn) or summarizes it, written in your own language. It explains like a tutor, not just a dictionary: grammar, conjugations, context, and examples.
How do I use it?
Highlight text, right-click, and choose Learn (Linguistically or Technically) or Summarize (Sharp, Balanced, or Detailed). The answer appears in a small card on the page. You can star up to three actions in settings to pin them to the top of the right-click menu, one click away.
Is there a free plan?
Yes. The Free Plan lets you bring your own AI provider key (Gemini, OpenAI, DeepSeek, or Claude) and use every feature, including custom prompts. Or subscribe to the Bro Plan or Pro Plan to use our built-in AI with no setup.
What is the difference between the Free, Bro and Pro plans?
The Free Plan uses your own API key, so you control the model and pay your provider directly. The Bro Plan and Pro Plan use Oldwise's built-in AI with no setup: the Bro Plan runs on fast, advanced models with concise answers and selections up to 500 characters, while the Pro Plan runs on high-level top models (stronger for technical questions), gives the full detailed breakdown, and handles selections up to 5,000 characters. See the comparison table in Pricing.
How do I connect my subscription to the extension?
Subscribe on this site, then open the extension settings and click "Connect Oldwise account". No copy and paste.
Which languages are supported?
Answers are written in the target language you choose in settings, with more than ten options including English, Turkish, Italian, Spanish, German, and French.
Can I customize it?
Yes. Star up to three favorite actions to pin them to the top of the right-click menu. And on the Free plan (your own API key), you can replace the default prompt for any action with your own in the advanced settings. Subscriptions always use Oldwise's tuned prompts.
How are usage limits measured?
By real usage (the tokens each query actually costs), not a flat query count. There is a short 5-hour limit and a weekly limit. Unused weekly credits carry over to the next week (half on Bro Plan, all on Pro Plan), up to 4 weeks, so a quiet week is not wasted. How usage works.
Is my data private?
Your selected text is sent only to the AI that answers it: your own provider with your key, or our built-in AI on a subscription. Nothing else about your browsing is collected.

Still need help? Contact support.