---
title: "Google on PDFs: converted to HTML, recrawled less often"
url: https://seomadman.com/news/google-pdfs-search-off-the-record-indexing
section: news
language: en
published: 2026-10-13T00:00:00.000Z
modified: 2026-10-13T00:00:00.000Z
author: Adam Hafez
topics: ["Indexing", "Technical SEO"]
---

# Google on PDFs: converted to HTML, recrawled less often

## The short answer

Google converts PDFs into an HTML representation before indexing, then ranks them with the same core systems as web pages, Martin Splitt and John Mueller said in a Search Off the Record episode on 13 October 2026. They advise defaulting to HTML, warn about scanned PDFs without OCR, and say PDFs are recrawled much less often.

## Key takeaways

- Martin Splitt and John Mueller said Google's pipeline converts a PDF into an HTML representation so it can be processed like a regular web page.
- They said converted PDFs use the same core systems as HTML pages and can appear in AI Overviews and be used for grounding.
- They said scanned or rasterized PDFs without OCR are hard for search engines to read, and that text in the file should be selectable.
- They advised defaulting to HTML and using PDFs for rigid print formatting, offline forms or paper documentation.
- They said auto-generated print PDFs of web pages can compete with the HTML version and go stale.

Martin Splitt and John Mueller devoted the 13 October 2026 episode of Search Off the Record,
[PDFs in Search: Indexing, AI & Pitfalls](https://search-off-the-record.libsyn.com/pdfs-in-search-indexing-ai-pitfalls),
to PDFs. Search Engine Roundtable's Barry Schwartz
[summarized it](https://www.seroundtable.com/google-search-on-pdfs-42291.html). We did not listen
to the episode, so the points below are the episode description and Schwartz's account.

## How does Google index a PDF?

A PDF is a binary container, not plain text. Google's pipeline converts it into an HTML
representation so its systems can handle it like a regular page. Text links in a PDF are preserved
and crawled. Images embedded in a PDF have no standalone URL, so they generally cannot show up in
Google Images.

## Do PDFs rank like web pages?

Converted PDFs use the same core systems as HTML pages, per the report, and can appear in AI
Overviews and be used by AI models for grounding. Splitt and Mueller still advised defaulting to
HTML, and keeping an llms.txt file as plain text, not a PDF. Our
[AI search](/topics/ai-search) hub covers how those answers are built.

## Which PDFs cause problems?

- Scanned or rasterized PDFs without OCR are hard to read. A quick test is to copy text out of the file.
- PDFs must fully download before rendering on a phone, and fixed layouts do not reflow when zoomed.
- Identical PDFs are exact binary duplicates, which makes canonicalization across domains hard. Mitigations named were rel=canonical in an HTTP header, metadata fields and links back to the publisher's site.
- Password-protected PDFs block search engine bots.

## How often are PDFs crawled?

Schwartz reports crawling is much less frequent than for HTML. To get an updated file indexed quickly, publish it under a
new URL. PDFs get a larger size limit than HTML pages, but Google does not publish an exact
cutoff because thresholds change as file sizes change.

## When should you still use a PDF?

The speakers' guidance, as reported, is to use a PDF for rigid print formatting, offline forms or
paper documentation, and HTML otherwise. Auto-generated print PDFs of web pages can compete with
the HTML version and go stale, so they deserve a check. See our
[indexing](/topics/indexing) and [technical SEO](/topics/technical-seo) hubs for the wider picture,
and the earlier [Mueller sitemap answers](/news/mueller-sitemaps-ai-crawlers-couldnt-fetch) from
the same podcast.

## Frequently asked questions

### Does Google index PDFs?

Yes. In the Search Off the Record episode, Martin Splitt and John Mueller said Google's pipeline converts a PDF into an HTML representation and processes it like a regular page.

### Do PDFs rank the same as HTML pages?

They use the same core systems, per the episode as reported by Search Engine Roundtable, and can appear in AI Overviews. The speakers still advised defaulting to HTML.

### How often does Google recrawl a PDF?

Much less often than HTML, per Search Engine Roundtable's account. To get an updated file indexed quickly, the report says to publish it under a new URL.

### Is there a size limit for PDFs?

PDFs get a larger limit than HTML pages, but Google does not publish an exact cutoff, per the report, because thresholds change as file sizes change.

## Sources

1. [PDFs in Search: Indexing, AI & Pitfalls](https://search-off-the-record.libsyn.com/pdfs-in-search-indexing-ai-pitfalls) - Google Search Off the Record (primary)
2. [Google Search On PDFs: Conversion, Links, HTML, Ranking, Limits, Crawling](https://www.seroundtable.com/google-search-on-pdfs-42291.html) - Search Engine Roundtable