In short. Kagi Universal Summarizer summarizes web pages, documents and media, with selectable output forms and language controls.

Definition: Kagi Universal Summarizer, also called Kagi Summarize, is a tool that produces summaries of web pages, documents and media. Kagi describes video and podcast summarization as requiring a transcript.

Key facts

As of 17 October 2026, Kagi's Summarize documentation lists web pages, PDF, PPTX, MP3 and video URLs as website inputs.
Kagi's Universal Summarizer API documentation also lists Word documents, forum threads, scanned PDFs and images, and labels YouTube URL support experimental.
Kagi's Bangs documentation provides !sum, !sumk and !summ shortcuts for summarizing a supplied page URL.
Orion's Summarize Page documentation describes a browser panel with summary type, output language and copy controls.

How does page summarization work?

Kagi's Summarize documentation describes a URL input on the Summarizer website. In search results, the Summarize control processes an individual result and displays its summary beneath that result.

A bang is a shortcut typed into a search or address bar. The same documentation gives this example, using Kagi's custom bangs video tutorial:

!sum https://www.youtube.com/watch?v=JwLDrZmNIIA

Kagi's Bangs reference assigns !sumk to key moments and !summ to a prose summary. These shortcuts specify both the document URL and the requested summary form in the search input.

Which inputs does the API accept?

An API is an interface through which software sends requests to a service. Kagi's API documentation specifies a document URL or supplied text as the input to its summarization endpoint. The url and text parameters are mutually exclusive: a request supplies one of them.

Its supported-content list covers text pages and forum discussions, PDF documents, PowerPoint presentations and Word documents. Audio support includes MP3 and WAV. Scanned PDFs and images appear with the label OCR. YouTube URLs carry the experimental label in this list.

For supplied text, Kagi recommends the POST request method to avoid URL length limits. The documentation sets a total request size limit of 1 MB. The API's summary output option produces paragraphs, while takeaway produces a bulleted list of key points.

How can the output change?

Kagi's website documentation describes Summary, Bullet Points and ELI5 modes. ELI5 produces a simplified summary. Summary offers length choices including Headline, Brief Summary and Digest, alongside Medium and Long. Optional translation uses Kagi Translate.

Orion's browser documentation uses the labels Key Moments for bullets and Summary for paragraph prose. On macOS, its panel also provides font and font-size controls through the aA button.

FAQ

Can I summarize a page from Orion?

Yes. Orion's instructions require an active Kagi subscription and Kagi as the search engine. On macOS, right-click the page and select Summarize Page; on iOS, tap the website icon beside the address bar and select Summarize with Kagi.

Can I read the summary in another language?

Yes. The same Orion documentation lets you select an output language different from the original page language. You can also copy the resulting summary to the clipboard.

Sources

Check how a page reads to answer engines. Open the GEO score analyzer