AI for documents and PDFs: AI tools compared (11)

What aI for documents and PDFs tools are for

AI tools for documents and PDFs let you ask questions about files, summarise their contents or extract structured information. They suit people who work with reports, case files and learning materials. You provide the documents, describe what you need and review the answer alongside the relevant passages. Previously, finding termination conditions in a document bundle meant searching through files and collecting the applicable paragraphs yourself. With a suitable tool, you can ask where those conditions appear and check the passages before writing your account. Humata displays material supporting an answer. NuExtract lets you define a schema for the information you want to extract. Available functions differ across questioning, translation and conversion, so these tools do not all support the same workflow. Your choice should reflect the output you need and the actual layout and structure of your files.

Example uses:

• Find passages describing an obligation in a document bundle, then read them in their full context.
• Prepare a report summary that separates explicit conclusions from information you still need to check.
• Extract defined fields from documents to prepare a table that your team can review and correct.
• Compare information across related files while keeping the document references needed to verify each extracted point.
• Translate working pages to understand their contents, then check terminology specific to your field or organisation.

Our picks by need

These picks follow simple rules applied to the verified data, with no partnership or affiliate link:

• Best scored : NuExtract. 73/100 on our access and transparency grid.
• Cheapest paid option : SwifDoo PDF. First plan at $1.66 per month.

The main tools at a glance

NuExtract 73/100

NuExtract extracts structured data from documents for people who want to specify the information to retrieve. It processes PDFs, scans and spreadsheets, with an API for automating extraction. Features: Extract structured data from documents; Convert documents to Markdown; Define a schema for the information to retrieve. Entry price: $1 pay as you go, with a free tier. Runs on: web browser and API. Data hosting: Several regions.

Gemini Notebook 73/100

Gemini Notebook helps people study collections of documents. It retrieves passages supporting answers, produces study guides, turns sources into audio summaries, and organizes information in notebooks. Features: Ask questions about a collection of documents; Find passages that support an answer; Produce study guides. Entry price: $9.99 per month, with a free tier. Runs on: web browser, iPhone and iPad, Android, and API. Data hosting: Several regions.

UPDF AI 60/100

UPDF AI lets people reading PDFs ask questions, summarize documents, and get explanations of difficult passages. It also supports translating pages while preserving their layout and rephrasing text. Features: Ask questions about a PDF; Summarize a document; Translate pages while preserving their layout. Free tier available. Runs on: web browser, Windows, macOS, iPhone and iPad, and Android. Data hosting: Several regions.

Documind 58/100

Documind lets people working with PDFs ask questions across several files and receive answers with document references. It also summarizes long documents and creates chatbots that can be shared or embedded. Features: Ask questions about multiple PDFs; Get answers accompanied by document references; Summarize long documents. Entry price: $9.93 per month, with a free tier. Runs on: web browser and API. Data hosting: United States.

Humata 55/100

Humata lets users and teams ask questions about documents and summarize multiple files. It displays passages supporting answers and allows a document assistant to be embedded in a web page. Features: Ask questions about documents; Summarize information from multiple files; Display passages supporting an answer. Entry price: $9.99 per month, with a free tier. Runs on: web browser and API.

Instafill.ai 53/100

Instafill.ai serves people filling out forms from source documents or spreadsheets. It supports reusable data profiles and allows users to edit and sign the completed documents. Features: Fill out forms using source documents; Turn a non-interactive PDF into a fillable form; Fill out documents in batches from a spreadsheet. Entry price: $99 per month. Runs on: web browser, browser extension, and API. Data hosting: Several regions.

SwifDoo PDF 53/100

SwifDoo PDF lets people working with PDFs summarize, question, and edit their documents. It also supports translation, conversion to office documents, signing, merging, and file compression. Features: Summarize a PDF document; Ask questions about its content; Translate and rephrase passages. Entry price: $1.66 per month, with a free tier. Runs on: web browser, Windows, macOS, iPhone and iPad, and Android.

ChatPDF 51/100

ChatPDF lets users ask questions about documents and summarize multiple files. It serves people who want to compare document contents or find the pages that support an answer. Features: Ask questions about a document; Summarize multiple files; Find the pages that support an answer. Free tier available. Runs on: web browser, iPhone and iPad, macOS, and API.

aiPDF 48/100

aiPDF lets people working with books and reports ask questions and obtain summaries. It analyzes multiple PDF or EPUB documents together and retrieves the passages that support an answer. Features: Ask questions about a document; Summarize a book or report; Find passages that support an answer. Entry price: $9 per month, with a free tier. Runs on: web browser, iPhone and iPad, and Android. Data hosting: Several regions.

PdfGPT 48/100

PdfGPT lets people working with PDFs summarize documents and ask questions with page references. It supports conversations covering several documents and produces study cards and quizzes. Features: Summarize a PDF document; Answer questions with page references; Query multiple documents in one conversation. Entry price: $4.99 per month, with a free tier. Runs on: web browser.

The category in figures

Of the 11 tools in the category, 10 (91%) offer a free tier, 55% have a public API and 3 have a French interface. The median entry price, per month, is $9.93 (across 7 tools with a published price). 7 disclose where data is hosted, 0 of them in Europe or on device.

Also useful

These tools belong to another category but also cover this need:

• LlamaIndex LlamaIndex lets teams processing documents extract content, structure tables, and index documents for search.
• AMiner AMiner lets people conducting research find scientific publications, ask questions about documents, and explor
• Recall Recall lets users save articles and videos and summarize videos, podcasts and PDFs. It serves people who want
• Claude Claude writes texts, analyzes documents and images, and writes or explains code. It serves people who want to
• Elicit Elicit helps people conducting scientific research find and summarize publications. It supports asking questio
• Jina Reader Jina Reader extracts main web page content, converts URLs or PDFs to Markdown and returns structured JSON cont
• SciSpace SciSpace supports people searching and comparing scientific publications. It allows questions about articles a
• Dext Dext is for people processing supporting documents and preparing accounting entries. It extracts invoice and r
• Glasp Glasp helps people keep reading notes and highlight web pages and PDFs. It summarizes YouTube videos, answers
• Perplexity Perplexity is for people seeking information on the Web with its sources. It also lets users compare and summa
• fynk fynk lets teams managing contracts prepare documents from templates and check their clauses. It extracts dates
• Rayyan Rayyan helps research teams screen systematic review references, detect duplicates and estimate article releva

Choosing well and avoiding pitfalls

Test your own files, especially scans, tables and documents with complex layouts. Check French text handling where relevant and whether answers link to exact supporting passages. Separate your needs for summaries, translation, conversion and structured extraction. Review export formats and whether document references remain attached to results. For shared work, examine permissions and deletion options. Read the conditions governing confidential uploads and processing. Finally, compare how imports, questions and processing operations are charged against your normal workflow, including the effort required to check and reuse the results outside the service.

Poor scans, tables and footnotes can be misread. A tool may combine passages about different situations or answer even when the required information is absent. Check supporting excerpts in the original file, especially for obligations and consequential details. Validate extracted fields before putting them into another system. Remove unnecessary personal information and review access rights, retention and deletion conditions. A document reference helps you inspect an answer, but does not establish that the interpretation is complete.

To compare with the cost of using an AI model directly, see the API price calculator.

Free or paid?

Free plans generally let you try uploads, questions and summaries on files that fit the service’s restrictions. Access may vary by document characteristics or requested processing. Paying becomes useful for recurring work across document bundles, structured exports or access and privacy controls suited to your organisation. Check whether the features you need apply to your actual file types.

Tools in the category with a free tier: NuExtract, Gemini Notebook, UPDF AI, Documind, Humata, SwifDoo PDF, ChatPDF, and aiPDF.

For which jobs?

The profiles that use these tools most, based on the use cases documented by publishers: students, researchers, lawyers, teachers, accountants and finance teams, and freelancers.