Convert between PHP Serialized data and JSON • Repair and format PHP serialized strings
System Definition BlockConvert PHP serialized strings to JSON and vice-versa instantly. Perfect for debugging database blobs or session data locally without needing a PHP server.
WebToolkit Pro is engineered for zero-trust environments. This utility processes your sensitive data entirely within your browser using Web Workers.
Our tool utilizes a robust JavaScript port of PHP's native `serialize()` and `unserialize()` functions. It parses the specific string-length markers (e.g., `s:4`) and array counters (e.g., `a:2`) locally in your browser, mapping them directly to equivalent JSON objects and arrays without needing a backend server.
// NEVER use unserialize() on untrusted user input due to object injection vulnerabilities.
// Convert legacy data to JSON format instead.
$legacyData = 'a:2:{s:4:"name";s:3:"Abu";s:4:"role";s:5:"admin";}';
$array = unserialize($legacyData, ['allowed_classes' => false]);
$json = json_encode($array);
// Output: {"name":"Abu","role":"admin"}PHP serialization is incredibly fragile. It relies on strict byte-length markers (like `s:5:"apple"`). If you manually edit the word 'apple' to 'orange' (which is 6 letters) but forget to change the `s:5` to `s:6`, the entire string corrupts and will fail to parse.
Yes and no. It will successfully parse custom class objects (indicated by `O:ClassName`), but because the tool runs in JavaScript, it converts them into generic JSON objects. When you re-serialize them, they will remain generic objects rather than retaining their original custom class bindings.
Yes! A common issue when migrating WordPress sites is that changing URLs alters the string length, which breaks the serialization in the database. You can paste the broken blob here, fix the string lengths, convert it to JSON, and re-serialize it safely.
// All processing occurs locally in your browser. WebToolkit Pro does not transmit, store, or log your input data.
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Explore All WebToolkit Pro ToolsZero-Knowledge Protocol: To guarantee absolute user privacy, this tool executes 100% client-side inside your web browser via WebAssembly and local JavaScript. None of your input strings, payloads, keys, or files are ever transmitted to a remote server.
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