{"slug": "pasted-file-editor", "title": "Pasted File Editor", "summary": "Simon Willison released a new web tool called Pasted File Editor that automatically converts large text pastes into file attachments, mimicking a feature from Claude AI. The tool, built using Codex desktop, also supports direct file opening with image thumbnails and drag-and-drop functionality.", "body_md": "**Tool:** [Pasted File Editor](https://tools.simonwillison.net/pasted-file-editor)\n\nI really like how you can paste a large volume of text into [claude.ai](https://claude.ail) (or the Claude desktop/mobile apps) and it will detect it as a large paste and turn it into a file attachment instead.\n\nI decided to have Codex desktop [build me a version of that](https://gist.github.com/simonw/74c79119b487a5acce18b4dcc26b9f79) as a prototype.\n\nYou can also open files directly - including images which will be shown as thumbnails - or drag files onto the textarea.\n\nTags: [javascript](https://simonwillison.net/tags/javascript), [tools](https://simonwillison.net/tags/tools), [ai-assisted-programming](https://simonwillison.net/tags/ai-assisted-programming), [claude](https://simonwillison.net/tags/claude), [codex](https://simonwillison.net/tags/codex)", "url": "https://wpnews.pro/news/pasted-file-editor", "canonical_source": "https://simonwillison.net/2026/Jun/2/pasted-file-editor/#atom-everything", "published_at": "2026-06-02 04:13:36+00:00", "updated_at": "2026-06-02 22:11:37.158579+00:00", "lang": "en", "topics": ["ai-tools", "ai-products", "generative-ai", "large-language-models"], "entities": ["Claude", "Codex", "Simon Willison"], "alternates": {"html": "https://wpnews.pro/news/pasted-file-editor", "markdown": "https://wpnews.pro/news/pasted-file-editor.md", "text": "https://wpnews.pro/news/pasted-file-editor.txt", "jsonld": "https://wpnews.pro/news/pasted-file-editor.jsonld"}}