RSX · CDN
Files, and
links that hold.
RSX CDN is free file hosting and sharing: 10 GB with an RSX ID, direct links that work as embeds, and previews for the formats a link normally makes you download first. It is built and provisioning is under way. It is not accepting uploads yet.
Storage
10 GB
Per account, free. Identical files are stored once and counted once.
Delivery
Direct
Raw bytes from rsxcdn.com, cached at the edge, no interstitial page.
Visibility
Three
Public, unlisted, or private behind a short-lived signed link.
Account
RSX ID
Required for every upload. There are no anonymous files.
Capabilities
What it does.
Six things, each of which is either true today or not listed.
01
Embeds that work
A link drops into an image tag, a video element, or a Discord message and renders. Correct content type, ranged requests, ETags and conditional responses were day-one requirements rather than a later fix, because every embed surface has to be retested when they change.
02
Direct file access
Every file has a raw URL on rsxcdn.com that returns the bytes and nothing else. No landing page, no countdown, no advertising. Content is immutable, so a URL that works today keeps working.
03
Three visibilities
Public files can be embedded anywhere. Unlisted files are delivered the same way but never surfaced by us. Private files answer nothing at all without a signed link that expires shortly after it is minted.
04
Previews before download
Thumbnails for images, poster frames for video, source with line numbers for text, a listing for an archive without downloading the archive, and geometry for a 3D model. Built once when the file lands, not on every view.
05
Resumable uploads
Large files upload in parallel parts, straight to storage, and survive a closed tab. Reopen the page and the upload picks up from the parts that already landed rather than starting again.
06
Links you can revoke
A share link carries its own name, visibility, and expiry, and points at the content rather than being it. Rename it, change who can see it, or revoke it, and the change reaches the edge in seconds.
Previews
What it can
show you.
A preview is built when the file lands, not when someone opens it. Formats that cannot be handled say so by name rather than spinning.
| Kind | What you get |
|---|---|
| Images | Thumbnail and measured dimensions. Delivered inline, and sized correctly in an embed. |
| Video | First-frame poster and dimensions, so an embed renders a player rather than a link card. Seeking works. |
| Audio | Delivered inline with ranged requests, so a player can seek without downloading the file. |
| Delivered inline. Opens in the browser's own viewer. | |
| Text and source | Any language, plus JSON, CSV, Markdown and logs. Shown as escaped source with line numbers. |
| Archives | ZIP, TAR, TAR.GZ and RAR5 are listed entry by entry. ZIP and TAR entries can be pulled out individually. 7z cannot be listed: its index is itself compressed. |
| 3D models | GLB, glTF, OBJ, STL and binary FBX render in a viewer isolated on its own origin. |
| Roblox models | RBXM and RBXL are parsed to an instance tree, with parts rendered as real geometry. Mesh parts and unions become labelled bounding boxes. The XML variant is not parsed. |
Using it
Three steps.
- Step 01
Sign in
With an RSX ID. Every file has an owner, which is what makes quotas, revocation, and takedown possible at all.
- Step 02
Drop the file
It uploads from your browser straight to storage. The bytes never pass through our API, which is why the size limit is not a request-body limit.
- Step 03
Copy the link
The share page for a rich embed with a filename and a preview, or the raw URL for anywhere that wants the file itself.
Design
Your files get
their own domain.
Uploaded bytes are served from a separate registrable domain, not from a subdomain of rsx.group. That is the single most important decision in the service: it means nothing anybody uploads has cookie or storage access to an RSX account, no matter what the file turns out to contain.
| Host | Serves |
|---|---|
| rsxcdn.com | Your file bytes, and nothing else. Never serves a page, never sets a cookie. |
| cdn.rsx.group | The portal: uploading, managing files, and the share pages that produce rich embeds. |
| p.rsxcdn.com | The 3D viewer, sandboxed on its own origin so a malformed model reaches nothing. |
Limits
What it is not.
Stated here so it is not discovered later.
- It is not a backup service. Keep your own copy of anything you cannot lose. Files can be removed under the Content Policy, and an account that closes takes its files with it.
- It is not a script host. Uploaded HTML, SVG and JavaScript are stored and served as plain text and can never be loaded as code. That is structural, not a rule we enforce: the stored type is derived from the file itself and there is exactly one answer for anything textual.
- It is not an object store. There is no S3-compatible write API and no third-party write access. Uploads happen from the portal, under your own account.
- Video is not transcoded. What you upload is what is served. If a player cannot open your file, it is your file that needs changing.
- There are no anonymous uploads. This is a deliberate limit and not a temporary one.
Rules
What governs it.
Files are subject to the Content Policy. We do not monitor what you upload and we do not review files as a matter of course. We do scan images against known child sexual abuse material, and we review any file that is reported, flagged by an automated signal, or the subject of a lawful request. Where something breaches the policy we remove it, and we tell the person who uploaded it why.
Report content that breaches the policy to abuse@rsx.group. Challenge an action taken against your account at appeals@rsx.group. RSX CDN is operated by RSX under the Whitehill Group banner.