PKGExtractor.Private by design
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SFO VIEWER

param.sfo Viewer — Read SFO Files Online

Already extracted param.sfo? Select it here to read its metadata without uploading it.

Reviewed October 23, 2026
Local workspace/ Package inspector
On-device processing
01 SELECT YOUR FILE
.sfo

Read your param.sfo.

Drop an SFO here to read its fields
and available metadata.

PKG or param.sfo · drag & drop · no uploads

Your file stays yours. Only selected byte ranges are read. Nothing is sent to a server.

02 INSPECTION RESULTS
Waiting for your file

Your package, made clearer.

Select a file to see its signature, header fields and any readable metadata.

File formatContent IDAvailable SFO fields
Source file stays unchanged No account neededHow local processing works

How to open a param.sfo file

Choose your local param.sfo in the inspector above. Its byte signature determines the format, regardless of the filename. Open Metadata to read supported string and integer fields, then use Export to save or copy a JSON report. The original file is unchanged.

What do TITLE_ID and APP_VER mean?

TITLE_ID is a title identifier stored in SFO metadata; APP_VER is an application version. They are shown only when present and in the supported syntax. A standalone SFO does not include a PKG header, so Content ID remains unavailable. Its signature alone does not establish which console or package it came from.

Supported files and limits

The viewer accepts plaintext SFO version 1.01 up to 1 MiB, with at most 512 entries. It displays supported UTF-8 strings and 32-bit integer fields, not binary fields. Malformed tables, duplicate keys and excessive text are rejected. This is a viewer, not an SFO editor or compatibility checker.

Still have the PKG instead?

Select the PS4 PKG in the same inspector. Open Extract files to validate and save a readable param.sfo or icon0.png. Encrypted or invalid resources cannot be extracted.

PS4 PKG inspection and extraction guide