
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

LightPDF records 1,742,568 monthly visits with -15.3% month-over-month growth and Freemium pricing. PDF GPT records 1,507 monthly visits with -7% growth and Freemium pricing.

Chat with your PDFs — summaries, citations and multi-document search in seconds
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | lightpdf.com | pdfgpt.chat |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 1.74M (1,742,568) | 1.51K (1,507) |
| MoM Traffic Delta |
| -314.58K (-15.3%) |
| -114 (-7%) |
| Primary Market & Share | 🇮🇳 India (24.9%) | 🇹🇭 Thailand (74.8%) |
|---|
| Direct Visits / mo | 442.07K | 616 |
|---|
| User Rating | 4.2 | 3.8 |
|---|
| Supported Platforms | Website | Website |
|---|

Free AI-powered PDF editor, converter and reader for every device
Upload a PDF and ask questions in natural language, follow up on details and see which passages the answers came from. A separate chat mode works with YouTube videos.
Translate whole documents, including scanned and image-based PDFs, into 20+ languages while keeping the original formatting and layout intact.
Convert invoices, receipts, bank statements and purchase orders into structured, editable Excel files automatically.
Edit text and images, OCR scanned pages, convert to and from Office formats, then merge, split, compress, watermark, sign and annotate.

Chat with your PDFs — summaries, citations and multi-document search in seconds
Every response links back to the page it came from and highlights the supporting passage, so you can check the evidence rather than take the answer on trust.
Generate instant summaries of lengthy PDFs to decide what deserves a close read and what you can skim.
Upload several documents and query them together, finding a specific detail without opening files one by one.
Apply tags to PDFs and then chat with a group defined by a tag, keeping distinct projects separated.

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.

SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
#3
AI research platform for reading, understanding and writing scientific papers
A free, AI-powered PDF editor for every device
Offers a robust desktop suite for OCR and editing, but requires software installation unlike cloud platforms.

Provides quick browser-based PDF editing and e-signatures, but has a less advanced conversational AI assistant.

Cross-platform PDF editing with GPT-powered AI for reading, translating, and signing documents
Chat with any PDF, video, or website and get cited answers in seconds
Chat with any PDF and get cited answers instantly
Chat with any PDF and add an AI chatbot trained on your own content

SpecialistDelivers superior OCR accuracy for converting complex PDFs and scans, but lacks general-purpose PDF editing tools.
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistEnterprise-grade neural machine translation, AI writing refinement, and real-time voice translation across thirty-plus global languages.
AI research platform for reading, understanding and writing scientific papers
Offers a robust desktop suite for OCR and editing, but requires software installation unlike cloud platforms.
Provides quick browser-based PDF editing and e-signatures, but has a less advanced conversational AI assistant.
Chat with any PDF and add an AI chatbot trained on your own content