Open CIA files in your browser
The file a Nintendo 3DS title is installed from: a game, an update or DLC. Open one right here to see its icon, its names and what it holds. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your title opens on a page of its own, with what it is and every part it holds.
- What it is • From the headers it keeps
- Every part • With its size
- Never decrypted • What's locked, said plainly
- Nothing in it runs • Read, never installed
About CIA
CIA, CTR Importable Archive, is the 3DS's install format, CTR being the console's code name. A CIA holds one title, a game, an update, DLC or an app, with what the console needs to install it.
It holds a certificate chain, a ticket and the title's metadata, with its title ID, its version and a SHA-256 of each content, then the contents themselves, usually encrypted with Nintendo's keys. Its meta section, which isn't encrypted, keeps the SMDH: the title's icon, its names and publisher in each language and its age ratings.
Filepeek reads the SMDH and the metadata into a page with the icon, names, publisher, regions and ratings, the title ID, what kind of title it is and its version, and each content with its size and hash. Nothing is decrypted, since Filepeek carries no console keys.
CTR Importable Archive
.cia
Format
- MIME type
- application/x-ctr-cia
- Made by
- Nintendo
Inside the file
- Parts
- Certificates, ticket, metadata and contents
- Title
- Its ID, kind and version
- SMDH
- Icon, names, publisher and ratings
- Contents
- Encrypted, each with its SHA-256
Opens in every browser
No browser opens a CIA: they download it. Filepeek reads it in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I see what's in a CIA file?
Drop it on this page or choose Peek a CIA. Its page shows the title's icon, names and publisher, its title ID and version, and its contents.
Can Filepeek decrypt a CIA?
No. Its contents stay encrypted as they are. Filepeek carries no console keys and takes none, and shows only what's readable without them.
Is my file uploaded?
No. It opens inside your browser and never leaves your device.