About PasteDownloadApp
PasteDownloadApp is a single-page tool that turns a clipboard image into a downloaded PNG, JPEG, or WebP file, entirely inside your browser tab. I built and run it myself. There is no team, no company behind it beyond me, and no server that ever sees your images.
Why I Built This
I needed to save a screenshot as a plain file more times than I can count, and every time it meant opening Paint or Preview, pasting into a blank canvas, cropping the excess, and clicking through a Save As dialog. Four or five steps for something that should take one. The browser already has everything needed to skip all of that: the Clipboard API can read an image straight out of a paste event, and the Canvas API can re-encode it as PNG, JPEG, or WebP on the spot. So I built a page that does exactly that: paste, pick a format if you want one other than the default, and the file downloads. No upload step exists in the code at all, which is different from a privacy promise made about a system that could technically upload your data but chooses not to.
What It Actually Does
- Clipboard paste: reads an image directly from your clipboard using the browser's Clipboard API, no upload involved.
- Format conversion: re-encodes to PNG, JPEG, or WebP using the Canvas API, all on your device.
- Auto-download: saves each pasted image immediately without an extra click, useful for getting through several screenshots quickly.
- No account, no limit: there is nothing to sign up for and nothing that stops working after a certain number of downloads.
What It Does Not Do
It does not resize images, it does not batch-process a folder of files at once, and it cannot turn a raster photo into a true vector SVG. Those are deliberate limits, not omissions I plan to quietly work around. If a feature would need a server, an account, or a heavier codebase than a single browser tab can run, it is out of scope for this tool. I write about the edges of what it can and cannot do on the blog, including real test results rather than marketing claims.
Who This Is For
PasteDownloadApp is built for anyone who needs to turn a screenshot or a copied image into an actual file without opening a heavier editor: a developer grabbing a UI screenshot for a bug report, a writer pulling a reference image into a document, or someone who just copied an image from a chat app and wants it saved as a PNG. It is deliberately not aimed at professional photo editing or batch processing workflows. If you need layers, filters, or bulk conversion of hundreds of files at once, a dedicated desktop application will serve you better than a single browser tab ever could.
A Note on Trust
I understand that “nothing is uploaded” is an easy claim to make and a harder one to prove from the outside. That is part of why this page describes the exact browser APIs involved rather than just asserting privacy in the abstract. If you want to verify it yourself, open your browser's developer tools, go to the network tab, and paste an image. You will see requests to load the page and its fonts, but nothing carrying your pasted image data to a server I control.
How It Works, Technically
When you paste an image, the browser fires a paste event with the raw image data attached. The page reads that data, draws it onto an HTML canvas element, and calls canvas.toBlob() to produce a file in your chosen format. At no point does this involve a request to any server I control. You can verify this yourself by opening your browser's network tab while using the tool.
Get in Touch
If something is broken, confusing, or missing, I would genuinely like to know. Reach me through the contact page, by email at hello@pastedownloadapp.com, or read more about who is behind this on the author page.
