.zstTypical support level 2

Inspect ZST File Details Online

Check available Zstandard file information in your browser. No extraction or editing. Free, with no uploads, signup or software installation.

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Your file stays on this device

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What Anyfile can show

Recognized headers and container properties
Bounded entry or stream metadata when available

Limits and conditions

This is structural inspection, not a full extraction workflow
Encrypted, corrupt or extreme inputs can be rejected

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7-Zip — Use a dedicated archive utility when you need to extract, test or create archive contents.

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IMPLEMENTATION

Viewers responsible for this format

Zstandard stores fast compressed frames with optional content size, checksum and dictionary identifiers. Anyfile inspects those frame properties locally without treating every payload as an archive.

Archive metadata viewer

Archive metadata viewer: explore supported file formats, viewing limits and open-source credits. Your files are never uploaded.

See implementation and open-source credits

Common question

Why might a ZST frame need a dictionary?

Some producers compress against an external dictionary; metadata can be readable even when that payload cannot be decoded alone.