Does it handle PHP objects (O:)?

Yes, objects decode with a __class field holding the class name and their public properties.

Are multibyte strings handled?

Yes, string lengths are computed in bytes (matching PHP), then decoded as UTF-8.

Can I go back from JSON to PHP serialized?

Yes, switch the direction to JSON → PHP serialized.

Is my data uploaded to a server?

No. This tool runs entirely in your browser using standard web APIs, so your input never leaves your device and nothing is logged or stored on our servers.

Does it work offline and on mobile?

Yes. Once the page has loaded it keeps working without a network connection, and the layout is responsive so it stays usable on phones and tablets.

PHP Serialize Converter

Convert between PHP serialize() format and JSON.

Support

Works Offline

Privacy First

No Login

No API

Direction

PHP serialized string

JSON

{
  "id": 42,
  "name": "Ada",
  "roles": [
    "admin",
    "user"
  ]
}

About the PHP Serialize Converter

Parse PHP's native serialize() strings (a, s, i, b, d, N, O) into readable JSON, or turn JSON back into a PHP serialized string. Arrays, nested objects, booleans, doubles and PHP objects with their class names are handled, including UTF-8 aware string length counting.

Examples

PHP array to JSON

a:2:{i:0;s:3:"Ada";i:1;s:5:"admin";}

Output

["Ada","admin"]

Keyboard shortcuts

Copy the main outputCtrl / ⌘ + Shift + C
Download the resultCtrl / ⌘ + S
Share this toolCtrl / ⌘ + Shift + S
Reset the inputsAlt + R
Open the tool search paletteCtrl / ⌘ + K

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Frequently asked questions

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Version 1.0.0 · Updated 2026-08-25 · Runs entirely in your browser