ChatGPT allows PDF uploads up to 512MB. If your file is over the limit or slow to process, compress it here first.
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š” Good to know
āChatGPT allows PDF uploads up to 512MB per file.OpenAI Help ā
āText-based PDFs are also limited to 2 million tokens per file in ChatGPT.OpenAI Help ā
āUsers on paid ChatGPT plans can upload up to 80 files every 3 hours. Free users are limited to approximately 3 files per day.OpenAI Help ā
āTotal file storage across all ChatGPT conversations is capped at 10GB per user.OpenAI Help ā
āScanned PDFs with many images may process slowly or cause errors even under 512MB ā compressing image quality helps.
ā Frequently Asked Questions
What is the maximum PDF size I can upload to ChatGPT?+
512MB per file. This applies to both regular chat conversations and custom GPT knowledge files.
Why is my PDF slow to process in ChatGPT even though it's under 512MB?+
Scanned PDFs store each page as a high-resolution image, which takes longer to process. Compressing the images inside the PDF speeds up processing significantly.
Does ChatGPT read the entire PDF at once?+
Not always. For large documents, ChatGPT uses retrieval methods ā it searches for relevant sections rather than reading the whole file. Splitting large PDFs into topic-specific sections improves accuracy.
What should I do if my PDF exceeds 512MB?+
Split it into smaller parts, compress it to reduce image sizes, or convert image-heavy pages to text format (.txt or .md) to stay under the token limit.
How many PDFs can I upload to ChatGPT?+
Paid users can upload up to 80 files every 3 hours. Free users are limited to approximately 3 files per day.