---
title: txJsonToPb()
---
# txJsonToPb() <TitleWithCodeLink2 link="txJsonToPb" />
Serialize a transaction, convert transaction object in json format into protobuf structure

## Usage
```js
utils.transaction.txJsonToPb(transaction)
```

## Parameters
transaction : Object - The transaction object in json format.

## Return
Object - A transaction object in protobuf format.

## Example
```js
import { TronWeb, utils } from 'tronweb';

const tronWeb = new TronWeb({
    fullHost: 'https://api.nileex.io',
    privateKey: 'your private key',
});
const txJson = await tronWeb.transactionBuilder.sendTrx("TVDGpn4hCSzJ5nkHPLetk8KQBtwaTppnkr", 100, "TNPeeaaFB7K9cmo4uQpcU32zGK8G1NYqeL");
const txPb = utils.transaction.txJsonToPb(txJson);
```