Put a real PDF editor inside your app.

dependencies: [
    .package(url: "<your PDF-SDK package URL>", from: "2.4.1"),
],
targets: [
    .target(name: "MyApp", dependencies: [
        .product(name: "PDFEditorUI", package: "pdf-sdk"),
    ]),
]

import SwiftUI
import PDFEditorUI

@main
struct MyApp: App {
    init() { PDFEditorSDK.setLicenseKey("PE1.eyJ2Ijox…") }
    var body: some Scene { WindowGroup { ContentView() } }
}

// Present the editor; the edited PDF comes back as Data.
PDFEditorView(url: pdfURL) { edited in
    try? edited.write(to: pdfURL, options: .atomic)
} onCancel: { }

// Mac Catalyst target — the same code as iOS
import SwiftUI
import PDFEditorUI

@main
struct MyApp: App {
    init() { PDFEditorSDK.setLicenseKey("PE1.eyJ2Ijox…") }
    var body: some Scene { WindowGroup { ContentView() } }
}

// Present the editor; the edited PDF comes back as Data.
PDFEditorView(url: pdfURL) { edited in
    try? edited.write(to: pdfURL, options: .atomic)
} onCancel: { }

dependencies {
    implementation("com.pdfsdk:pdfeditor:2.4.1")
}

// Once, in Application.onCreate()
PdfEditorSdk.setLicenseKey("PE1.eyJ2Ijox…")

setContent {
    PdfEditorScreen(
        pdfPath = file.absolutePath,
        onSave = { bytes -> file.writeBytes(bytes) },
        onClose = { finish() },
    )
}

npm install ./pdfsdk-editor-2.4.1.tgz

import { PDFEditor } from '@pdfsdk/editor';

const editor = await PDFEditor.create(canvas, {
  licenseKey: 'PE1.eyJ2Ijox…',   // issued for your domain
});

editor.open(new Uint8Array(await file.arrayBuffer()));
const edited = editor.save();    // the edited PDF

dependencies:
  pdf_editor:
    path: vendor/pdf_editor   # comes with your license

await PdfEditor.setLicenseKey('PE1.eyJ2Ijox…');

final String? edited = await PdfEditor.open(
  path: file.path,
  mode: PdfEditorMode.annotate,   // optional
);

npm install <the package that comes with your license>

import { PdfEditor } from '@pdfsdk/react-native-pdf-editor';

await PdfEditor.setLicenseKey('PE1.eyJ2Ijox…');

const edited = await PdfEditor.open({ path: filePath });
if (edited) await upload(edited);