📄 playwright-python/java/docs/api/class-formdata

File: class-formdata.md | Updated: 11/18/2025

Source: https://playwright.dev/java/docs/api/class-formdata

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The FormData is used create form data that is sent via APIRequestContext .

import com.microsoft.playwright.options.FormData;// ...FormData form = FormData.create()    .set("firstName", "John")    .set("lastName", "Doe")    .set("age", 30);page.request().post("http://localhost/submit", RequestOptions.create().setForm(form));

Methods​

append​

Added in: v1.44 formData.append

Appends a new value onto an existing key inside a FormData object, or adds the key if it does not already exist. File values can be passed either as Path or as FilePayload. Multiple fields with the same name can be added.

The difference between FormData.set() and FormData.append() is that if the specified key already exists, FormData.set() will overwrite all existing values with the new one, whereas FormData.append() will append the new value onto the end of the existing set of values.

import com.microsoft.playwright.options.FormData;// ...FormData form = FormData.create()    // Only name and value are set.    .append("firstName", "John")    // Name and value are set, filename and Content-Type are inferred from the file path.    .append("attachment", Paths.get("pic.jpg"))    // Name, value, filename and Content-Type are set.    .append("attachment", new FilePayload("table.csv", "text/csv", Files.readAllBytes(Paths.get("my-tble.csv"))));page.request().post("http://localhost/submit", RequestOptions.create().setForm(form));

Usage

FormData.append(name, value);

Arguments

Returns

create​

Added in: v1.18 formData.create

Creates new instance of FormData .

Usage

FormData.create();

Returns

set​

Added in: v1.18 formData.set

Sets a field on the form. File values can be passed either as Path or as FilePayload.

import com.microsoft.playwright.options.FormData;// ...FormData form = FormData.create()    // Only name and value are set.    .set("firstName", "John")    // Name and value are set, filename and Content-Type are inferred from the file path.    .set("profilePicture1", Paths.get("john.jpg"))    // Name, value, filename and Content-Type are set.    .set("profilePicture2", new FilePayload("john.jpg", "image/jpeg", Files.readAllBytes(Paths.get("john.jpg"))))    .set("age", 30);page.request().post("http://localhost/submit", RequestOptions.create().setForm(form));

Usage

FormData.set(name, value);

Arguments

Returns