Which chat-with-PDF tool has the most generous free tier?

Gemini Notebook, formerly NotebookLM, on raw volume: 50 chat queries a day, 50 sources per notebook, and up to 500,000 words per source. The cost is a Google account and your documents living inside a Google product. If that trade is fine, it is the most generous free option available.

Can I chat with a PDF without creating an account?

Yes. Pickrack's Chat With PDF needs no signup and allows 30 questions per IP per 24 hours. ChatPDF also lets you start without signing up, capped at 2 documents per day. Everything else in this category wants an account before the first question.

What is ChatPDF's free limit exactly?

ChatPDF's own site states 2 documents every day on the free plan. Page caps, file size caps and message caps are widely reported by third parties but are not published on the site itself, and the reported figures contradict each other, so treat any specific number you read elsewhere as unverified.

How big a document can Pickrack handle?

Around 80,000 characters of extracted text, which works out to roughly 30 to 50 pages depending on layout. Past that the tool returns a clear error rather than silently truncating. This is genuinely more restrictive than the alternatives, and it is the main reason to use something else.

Does my PDF get stored anywhere?

With Pickrack, the file uploads, text is extracted server-side with Poppler, the text is sent to Anthropic's API and the temporary file is deleted on response. Anthropic retains API traffic for 30 days for abuse monitoring and excludes it from training under its commercial terms. Other tools in this category keep your document to power the conversation — check each one's policy rather than assuming.

Why do different articles quote different limits for the same tool?

Because most vendors do not publish the numbers. Reviewers infer them by hitting the wall, at different times, on different plans, in different regions, and mobile in-app pricing often differs from web checkout. Any table on this topic is a snapshot, this one included.

Are ChatGPT and Claude usable for this?

Both accept file uploads on their free tiers and will answer questions about them, which covers a lot of casual use. Neither publishes a fixed free-tier document or message quota, and the limits move, so there is no honest number to put in a comparison table. Try them and see what you get.

What should I not put into any of these?

Anything you would not email to a stranger. Contracts under NDA, medical records, unreleased financials, identity documents. Every tool here sends your text to a third-party model provider. If a document cannot leave your organisation, no free chat-with-PDF tool is the right answer — run a local model instead.

Chat With PDF Free in 2026: What Each Tool Actually Lets You Do

Search this topic and you get a dozen roundups, all confident, all quoting different limits for the same tools.

They are not being careless. Most vendors in this category simply do not publish their free-tier numbers, so reviewers infer them by running into the wall — at different times, on different plans, in different regions. The numbers drift and nobody says so.

So this comparison does something slightly different: every figure below is labelled with where it came from, and where a vendor does not publish a number, it says so instead of guessing.

What "free" is hiding

Five different things get called free in this category:

Free, no account — start typing immediately
Free with an account — free forever, but you are identified and your documents sit in someone's product
Free with a daily document cap — the tool is unlimited, your uploads are not
Free with a message cap — upload what you like, ask a few questions
Free tier of a paid bundle — real limits, and the upgrade is not sold separately

Those are not interchangeable, and which one hurts depends entirely on how you work.

The numbers, with sources

Tool	Account	Free ceiling	Where the number comes from
Gemini Notebook (was NotebookLM)	Google account required	50 chat queries/day · 50 sources per notebook · up to 500,000 words per source	Google's published plan limits
Pickrack Chat With PDF	None	30 questions/day per IP · document up to ~80,000 characters	Our source code, quoted below
ChatPDF	Not for the basic flow	2 documents every day	chatpdf.com
ChatGPT / Claude free tiers	Account required	No published document or message quota	Not published — limits move

Two things worth pulling out of that table.

Gemini Notebook beats us, and it is not close

On volume, the most generous free option here is Google's. 50 chat queries a day against our 30, 50 sources per notebook, and a per-source ceiling of 500,000 words or 200 MB — that is a whole book, where we top out around a long report.

If you are researching across many documents and you already have a Google account, that is the correct tool and this article is not going to pretend otherwise.

Three things to know about it. It was renamed from NotebookLM to Gemini Notebook on 16 July 2026 — same tool, same limits, old links redirect. Daily quotas reset 24 hours after use rather than at local midnight, so hitting the cap at 11pm does not free you at midnight. And the paid tier is not sold on its own: NotebookLM Pro arrives bundled with Google AI Pro at 19.99 USD a month.

The cost of the free tier is the account. Your documents are in a Google product, associated with your identity, governed by Google's terms. For a lot of work that is completely fine. For some documents it is the whole question.

ChatPDF: two documents, and then a wall

ChatPDF's own site states the free plan allows 2 documents every day. That is the number the vendor publishes, so that is the number here.

You will find page caps, file-size caps and message caps for ChatPDF quoted all over the web. We could not verify any of them against the vendor, and the third-party figures disagree with each other — 20 messages a day or 50, 120 pages or 10, 2 MB or 10 MB. Some of those are probably right. We are not going to pass them along as fact.

What is not in dispute: two documents a day is a low ceiling if you are working through a stack of papers, and the flow is designed to make you feel that ceiling.

Where Pickrack actually fits

Pickrack's Chat With PDF has exactly one advantage, and it is worth being precise about it: no account, no email, no identity. Open the page, drop a PDF, ask a question. Nothing to sign up for and nothing to cancel.

The real limits, straight from the route handler rather than the marketing copy:

30 requests per IP per 24 hours
80,000 characters of extracted text   (roughly 30-50 pages)
2,000 characters per question
12 turns of conversation history

That document ceiling is the honest weak spot. A 300-page contract will not fit, and you get a clear error rather than a silent truncation that quietly answers from half the document. If your document is long, use Gemini Notebook.

Mechanically: the file uploads, Poppler extracts the text server-side, the text is chunked and streamed through Claude Haiku 4.5, and the temporary file is deleted when the response completes. Anthropic's commercial terms exclude API traffic from training and retain it 30 days for abuse monitoring. That is a real third party seeing your text — stated plainly, because "private" would be the wrong word for it.

Choosing

Situation	Use
Many documents, long documents, ongoing research	Gemini Notebook — nothing free comes close on volume
One document, a few questions, no account wanted	Pickrack
Casual one-off, already paying for ChatGPT or Claude	Just upload it there
Document cannot leave your organisation	None of these. Run a local model

That last row is not a formality. Every tool in this article sends your text to a third-party model provider. If the document is under NDA, contains medical records or identity documents, or is unreleased financials, the correct answer is a local model on your own hardware — Ollama with a long-context model will handle it, slower and less capable, on a machine you control.

The question the roundups skip

Not "how many questions do I get" but what happens to the document afterwards.

Tools that keep a persistent conversation with your PDF are storing that PDF. That is not sinister — it is how the feature works — but it means the document has a lifetime in someone else's system, governed by a policy you agreed to without reading.

Before uploading anything you would not email to a stranger, find the retention answer. If the site does not state one clearly, treat that as the answer.

Bottom line

Gemini Notebook is the most generous free option in this category. 50 queries a day, book-sized sources, costs you a Google account.

Pickrack is the one that never asks who you are. 30 questions a day, documents up to roughly 30-50 pages, no signup, no email, nothing to cancel. Narrower on purpose.

ChatPDF gives you two documents a day and does not publish the rest of its limits.

Pick on the constraint that actually binds you: document length, question volume, or whether you are willing to have an account at all.

Try it on a document now: Pickrack Chat With PDF.