Open MSGPACK files in your browser
JSON in binary, smaller and faster to read, the way caches, games and messaging apps keep their data. Open a MessagePack file right here as a tree you can fold. Nothing leaves your device.
Or drop it anywhere on this page
What you'll see
Your file opens as a tree, its first levels unfolded on a page as wide as a book.
- Fold and unfold • Files of any size
- Search keys and values • Every match counted
- Tree, Table or Text • Show shape
- Export • Save in another form, or just a part
About MSGPACK
Sadayuki Furuhashi made MessagePack in 2008 to send and store the same values as JSON in fewer bytes: small numbers fit in a single byte, and binary data fits as it is. Redis, Fluentd, Neovim and many games and apps use it.
A file holds one value or many one after another. Maps can have keys of any type, not only strings, and extension types add more, such as the timestamp MessagePack defines itself.
Filepeek reads the file with its own MessagePack reader and lists its values as a tree. Timestamps show as dates, keys that aren't strings show as text, binary data opens in its own viewer when it holds a picture or a file it knows, and a damaged file opens up to where it stops making sense.
MessagePack
.msgpack • .mpk • .msgpck
Format
- MIME type
- application/msgpack
- Made by
- Sadayuki Furuhashi
- Released
- 2008
Inside the file
- Values
- Maps, arrays, strings, numbers and binary
- Extras
- Timestamps and extension types
- Byte order
- Big-endian
- Files
- One value, or many after another
Opens in every browser
Browsers download MessagePack files. Filepeek opens them as a tree in Chrome, Edge, Firefox and Safari.
- YouChromeOpens through Filepeek
- YouEdgeOpens through Filepeek
- YouFirefoxOpens through Filepeek
- YouSafariOpens through Filepeek
Questions
How do I open a MessagePack file?
Drop it on this page or choose Peek a MSGPACK. It opens at once as a tree you can unfold, with nothing to install.
Can I turn MessagePack into JSON?
Yes. Choose Export, then Save as JSON or Save as YAML. Binary data is written in base64 and timestamps as dates.
Is my file uploaded?
No. The file opens inside your browser and never leaves your device.