OpenAnyFile
Works
Viewing, inspecting and verifying. You get the source with language-aware colouring and line numbers. File details, exact byte size and the detected signature are always shown.
How to open a .rs file
A RS file is a Rust Source, introduced by Graydon Hoare / Mozilla in 2010. Below: what is actually inside one, and how to open it without installing special software.
What is a .rs file?
Rust Source is a code format developed by Graydon Hoare / Mozilla, first appearing in 2010. It is normally produced by Systems software, WebAssembly.
Its borrow checker proves memory safety at compile time without a garbage collector. Now accepted in the Linux kernel.
| Full name | Rust Source |
|---|---|
| File category | Code |
| MIME type | text/x-rust |
| Developer | Graydon Hoare / Mozilla |
| Introduced | 2010 |
| Usually created by | Systems software, WebAssembly |
| OpenAnyFile engine | syntax highlighter |
| Opens without upload | Yes — parsed locally in your browser |
Open a .rs file in your browser
OpenAnyFile routes .rs to its syntax highlighter, which highlights the source with language-aware colouring and line numbers.
- Open the OpenAnyFile opener in this browser — nothing to download or sign up for.
- Drag your .rs file onto the drop zone, click to browse for it, or paste it with Ctrl+V.
- The extension is detected and the file is handed to the syntax highlighter.
- Your RS opens on its own viewer page: the source with language-aware colouring and line numbers.
- Use fullscreen for a closer look, or download the file back out unchanged. Free, and free in the sense that there is no paid tier waiting behind step three.
What you can and cannot do with it here
Does not work
Editing and re-saving. OpenAnyFile is a reader, not an editor — for changes you still need special software or an equivalent.
Local-only by design, not by promise
Plenty of sites promise they delete your uploads. OpenAnyFile avoids the promise by avoiding the upload. When you drop a .rs file in, the browser grants the page temporary read access to those bytes and nothing more — the page has no path to send them anywhere. You can verify it in seconds: open DevTools, switch to the network tab, and open a file. The request list stays empty.
Frequently asked questions about RS files
Can I open a .rs file without installing special software?
Yes. OpenAnyFile's syntax highlighter runs in your browser, so you can read a RS file with nothing installed. You get the source with language-aware colouring and line numbers. For full editing you still need the original application — this is a viewer, not an editor.
How can I tell what a .rs file actually contains?
The .rs extension carries no fixed signature, so the extension alone proves nothing. Opening it in OpenAnyFile shows the raw header bytes and detected type, which is the only reliable way to identify one.
Is it safe to open a RS file online?
With OpenAnyFile, yes, because nothing is uploaded. The file is read locally through your browser's File API and never leaves your device, so there is no server copy to leak, log or retain. That matters most for the kind of file people are least willing to hand to a random converter site.
What is a .rs file, exactly?
Rust Source — a text/x-rust format created by Graydon Hoare / Mozilla since 2010. Its borrow checker proves memory safety at compile time without a garbage collector. Now accepted in the Linux kernel.
Does the same viewer handle formats related to RS?
Yes — the same engine also opens .html, .xml, .sql, so you can compare related files without switching tools.
Related formats
These open with the same engine, so if you have one of these sitting next to your .rs file, it will open too: