# Pasted File Editor

> Source: <https://simonwillison.net/2026/Jun/2/pasted-file-editor/#atom-everything>
> Published: 2026-06-02 04:13:36+00:00

**Tool:** [Pasted File Editor](https://tools.simonwillison.net/pasted-file-editor)

I 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.

I decided to have Codex desktop [build me a version of that](https://gist.github.com/simonw/74c79119b487a5acce18b4dcc26b9f79) as a prototype.

You can also open files directly - including images which will be shown as thumbnails - or drag files onto the textarea.

Tags: [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)