Can Claude read PDFs?

Use Claude's built-in PDF reading for anything up to 1,000 pages; it needs no plug. Keep files to 100 pages or fewer when charts matter, and add a plug only for libraries of papers or files too large to upload.

ChatGPT

1. 1

   Attach the PDF

   Select + in the prompt area, then Add photos & files. Attach it straight to the chat so ChatGPT also reads the charts and images.

2. 2

   Ask for a structured summary

   Name the reader, the length and what to pull out.

   PromptCopy

   Summarize this paper in 150 words for a non-expert, then list the method, sample size and main limitation, with page numbers.

3. 3

   Mind the limits

   Each file can be up to 512MB and 2 million tokens. Free accounts can upload 3 files a day; paid plans get up to 80 files every 3 hours.

   Tip: Files saved to a GPT or a project may skip embedded images. To ask about a chart, attach the PDF directly to the chat.

Claude

1. 1

   Attach all the files

   Add up to 20 PDFs to one chat. For documents you will come back to, add them to a project's Files instead (30MB per file).

2. 2

   Ask for a side-by-side table

   Name the columns you want so the answer is easy to scan.

   PromptCopy

   Compare these 4 vendor proposals in a table: price, contract length, cancellation terms, support hours, and anything unusual. Cite the file and page for each cell.

3. 3

   Find conflicts

   Ask what the documents disagree on and where each says it.

   PromptCopy

   Where do these papers disagree? For each disagreement, give the claim, which paper says what, and the page.

Claude

1. 1

   Attach the PDF

   Click + in the lower left of the chat box and choose Add files or photos, or drag the PDF into the chat. You can attach up to 20 files.

2. 2

   Ask for the summary you need

   Say who the summary is for and what format you want, so you get something you can use, not a generic recap.

   PromptCopy

   Summarize this report for a busy manager: 5 bullet points of findings, 3 numbers that matter with the page each comes from, and anything that needs a decision.

3. 3

   Check the parts that matter

   Ask for page numbers on every claim and open those pages yourself before you repeat them.

   PromptCopy

   For each bullet, quote the sentence it comes from and give the page number.

4. 4

   Go deeper on one section

   Point to pages by the number your PDF viewer shows.

   PromptCopy

   Explain the table on page 14 in plain words. What would change if the second column were 10% lower?

   Tip: For PDFs over 100 pages Claude reads text only. If a chart matters, split those pages into a smaller PDF and attach it.

1. 1A
   Adobe for ClaudeOfficialHostedOAuth

   Adobe's official add-on for Claude: runs Acrobat tools that organize pages, redact, edit and annotate PDFs. Works without an Adobe account; signing in unlocks more.
2. 2
   Zotero MCPLocalNo sign-in

   Lets Claude or ChatGPT search, read and cite the full text of papers in your Zotero library, so you do not re-upload PDFs.

   5,659 GitHub stars
3. 3
   PDF Reader MCPLocal

   Reads PDFs on your computer and returns answers tied to the exact page and spot they come from.

   1,059 GitHub stars
4. 4
   Docling MCPLocal

   Converts PDFs, tables included, into structured text an assistant can work with. From the Docling project.

   782 GitHub stars
5. 5
   PageIndex MCPLocal

   Built for chatting with very long PDFs, local or online, beyond what fits in one upload.

   407 GitHub stars
6. 6
   markitdownOfficialLocalNo sign-in

   Runs Microsoft's MarkItDown to turn PDFs and Office files into Markdown for any assistant.