Claude’s file upload limit is 500 MB per file, with up to 20 files per chat, according to Anthropic’s Upload files to Claude help article.
As of November 10, 2026, Anthropic lists these chat upload limits: 500 MB per file, 20 files per chat, images up to 8,000 x 8,000 pixels and PDFs of up to 1,000 pages. Claude reads both text and visuals, such as charts, in PDFs of 100 pages or fewer, but only the text in PDFs of 101 to 1,000 pages. Longer PDFs are rejected with an “Uploaded file is too large” error.
Project files have a lower limit of 30 MB per file. A project can hold any number of files, but their total content must fit within Claude’s context window, and extra token limits can apply to long extracted text. The article does not list different upload limits by plan. Supported formats include PDF, DOCX, CSV, TXT, HTML, ODT, RTF, EPUB, JSON and XLSX (which requires code execution), plus JPEG, PNG, GIF and WebP images.
Related: What is the Claude context window?, Claude usage limits: how much can you use on each plan? and Unified Claude power-user guide
Source: Claude Help Center, Upload files to Claude
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