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Max file size 100 MB
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Summarize in 3 easy steps
Upload your PDF
Drop in the document you want summarized, reports, papers, contracts, anything.
Let AI summarize it
Our AI reads the whole document and pulls out the key points and main ideas.
Read the summary
Get a clear, concise summary in seconds, then download or copy it to share.
One place for every PDF task
Every tool you need to edit, convert, sign, and manage your PDF documents.
From a long PDF to key takeaways
Watch AI distill a dense document into the points that matter, in seconds.
quarterly-report.pdf
12 pagesKey takeaways
- Revenue grew 24% year over year, driven by new enterprise customers.
- Customer retention improved to 92% after the onboarding redesign.
- Next quarter focuses on expanding into two new regional markets.
The AI PDF summarizer people
actually trust
Real understanding, not keyword matching. Everything you need to summarize long PDFs with AI online.
Key points, instantly
Skip the skim
AI surfaces the main takeaways so you grasp a long document without reading every page.
Powered by advanced AI
Real comprehension
Our AI understands context and meaning, so summaries capture what actually matters.
Summaries in seconds
No more long reads
Turn hours of reading into a few seconds. Upload and get your summary almost instantly.
Built for long documents
Hundreds of pages
From short memos to lengthy reports, AI handles big documents without breaking a sweat.
Private and secure
AES encrypted
Your files are encrypted in transit and processed securely. We never share your documents.
Works in your browser
Any device, no install
Summarize PDFs on desktop, tablet, or phone, nothing to download or install.
Trusted every day,
by people like you
See what people are saying about summarizing PDFs with lumr.
TrustScore 4.6 · Based on 3,247 reviews
“I get 40 page reports and need the gist fast. lumr's AI gives me the key points in seconds.”
Sarah M.
Marketing Manager
“I summarize dense case files before class now. It saves me hours of reading every week.”
James K.
Law Student
“I drop in user interviews and research PDFs and instantly see the main themes. Game changer.”
Ana L.
Product Researcher
We answer
your questions
Everything you need to know about summarizing PDFs with AI online.
Our AI is built to capture the main ideas and key points faithfully. For critical decisions we always recommend reviewing the original document alongside the summary.
AI handles everything from a single page to lengthy reports of hundreds of pages. You can upload PDF files up to 100 MB.
Yes. The AI can summarize documents written in many languages, so you are not limited to English.
Absolutely. Your files are encrypted with AES during transfer and processed securely. We follow GDPR best practices and never share your documents with third parties.
You can upload PDF files up to 100 MB. For most documents this is more than enough.
Security you can trust
Independently audited and compliant with the security and privacy standards your documents demand.
- SOC 2 Type II
- GDPR
- ISO 27001
- HIPAA
- eIDAS
- PCI DSS
Ready to summarize your PDF?
Join millions of users who trust lumr to turn long PDFs into clear summaries with AI. No fees, no hassle.
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