--- title: "iOS PDF form library β€” Create, fill, and capture | Nutrient SDK" canonical_url: "https://www.nutrient.io/guides/ios/forms/" md_url: "https://www.nutrient.io/guides/ios/forms.md" last_updated: "2026-06-09T10:26:34.572Z" description: "Explore the ultimate guide to iOS form handling techniques, unveiled by industry experts. Master forms with practical insights and tips. Click now!" --- # PDF form library for iOS Nutrient iOS SDK is a library for filling, reading, creating, and editing PDF AcroForms. It offers developers an API for programmatic access to PDF form objects, as well as a beautiful UI for form filling. ## What are forms? The concept of forms in PDFs is similar to that of a form in the physical world. Forms allow a user to enter unique information into a preformatted page. As it’s an electronic format, PDF offers certain advantages to users β€” for example, the ability to edit entered information at a later date. [Learn more](https://www.nutrient.io/guides/ios/forms/introduction-to-forms.md) ## Essential guides --- **Supported form fields** Learn about the types of form fields supported by Nutrient [Read more](https://www.nutrient.io/guides/ios/forms/introduction-to-forms/form-fields.md) --- **Form data formats** Learn about using external files to manage form data [Read more](https://www.nutrient.io/guides/ios/forms/introduction-to-forms/data-formats.md) --- **Flatten forms** How to flatten forms and burn them into a PDF [Read more](https://www.nutrient.io/guides/ios/forms/flatten.md) ## Fill forms --- **Programmatic form fill** Learn the different approaches to programmatically filling form fields [Read more](https://www.nutrient.io/guides/ios/forms/form-filling.md) --- **Fill form fields using the UI** Learn about the form fill capabilities of the built-in UI [Read more](https://www.nutrient.io/guides/ios/forms/fill-form-fields/using-the-ui.md) --- **Attach a file to a PDF** How to attach a file to a PDF as an image annotation [Read more](https://www.nutrient.io/guides/ios/forms/fill-form-fields/attach-a-file.md) --- **Add an image to a PDF** How to add an image to a PDF as an image annotation [Read more](https://www.nutrient.io/guides/ios/forms/fill-form-fields/image-picker.md) --- **Undo and redo** Learn about the undo and redo functionality for forms [Read more](https://www.nutrient.io/guides/ios/forms/fill-form-fields/undo-and-redo.md) --- **Detect user form field input** How to listen for user input in forms [Read more](https://www.nutrient.io/guides/ios/forms/fill-form-fields/detect-user-input.md) ## Form data β€” Read, extract, submit, or save --- **Extract form data** How to extract form field values present in a PDF document [Read more](https://www.nutrient.io/guides/ios/forms/extract-form-data.md) --- **Submit or save form data to Document Engine** How to submit or save form data to the optional Document Engine [Read more](https://www.nutrient.io/guides/ios/forms/submit-or-save/to-document-engine.md) --- **Submit or save form data to an external destination** How to submit or save form data to an external source [Read more](https://www.nutrient.io/guides/ios/forms/form-submission.md) --- **Submit or save form data to a custom destination** How to submit or save form data to a custom destination [Read more](https://www.nutrient.io/guides/ios/forms/submit-or-save/to-custom-destination.md) --- **Embed form data into a PDF** How to embed form data into a PDF document [Read more](https://www.nutrient.io/guides/ios/forms/submit-or-save/embed-data-into-pdf.md) --- **PDF actions support** Learn about the PDF actions supported by Nutrient [Read more](https://www.nutrient.io/guides/ios/forms/pdf-actions-support.md) --- **JavaScript validation** How to validate form field values using JavaScript [Read more](https://www.nutrient.io/guides/ios/forms/javascript-validation.md) ## Create, edit, or remove forms --- **Form object model** How to use the `Annotation` and `FormElement` classes [Read more](https://www.nutrient.io/guides/ios/forms/create-edit-and-remove/form-object-model.md) --- **Create a fillable form** How to programmatically create a fillable PDF form [Read more](https://www.nutrient.io/guides/ios/forms/form-creation.md) --- **Add a signature field** How to add a signature form field to a PDF document [Read more](https://www.nutrient.io/guides/ios/forms/create-edit-and-remove/add-signature-field.md) --- **Edit form fields** How to update a form field or widget annotation [Read more](https://www.nutrient.io/guides/ios/forms/create-edit-and-remove/edit-fields.md) --- **Form field flags** How to configure form behavior and capabilities [Read more](https://www.nutrient.io/guides/ios/forms/create-edit-and-remove/form-field-flags.md) --- **Disable form editing** How to disable the modification of element types [Read more](https://www.nutrient.io/guides/ios/forms/create-edit-and-remove/disable-editing.md) **Call to Action** Start your free trial for unlimited access and expert support. [Learn More](https://www.nutrient.io/sdk/ios/getting-started.md) --- ## Related pages - [Extract data from PDF form fields on iOS](/guides/ios/forms/extract-form-data.md) - [Flatten PDF form fields on iOS](/guides/ios/forms/flatten.md) - [Exploring PDF form actions on iOS devices](/guides/ios/forms/pdf-actions-support.md) - [Validating PDF forms using JavaScript on iOS](/guides/ios/forms/javascript-validation.md) ## Pages in this section - [Creating fillable PDF forms on iOS](/guides/ios/forms/form-creation.md) - [How to disable PDF form editing on iOS devices](/guides/ios/forms/create-edit-and-remove/disable-editing.md) - [PDF form field flags on iOS](/guides/ios/forms/create-edit-and-remove/form-field-flags.md) - [Programmatically add signature fields to PDF forms](/guides/ios/forms/create-edit-and-remove/add-signature-field.md) - [PDF form field editor on iOS](/guides/ios/forms/create-edit-and-remove/edit-fields.md) - [Form object model on iOS](/guides/ios/forms/create-edit-and-remove/form-object-model.md) - [Detect user input in PDF form fields on iOS](/guides/ios/forms/fill-form-fields/detect-user-input.md) - [Attach a file to a PDF form field on iOS](/guides/ios/forms/fill-form-fields/attach-a-file.md) - [Add or edit images in PDF form fields on iOS](/guides/ios/forms/fill-form-fields/image-picker.md) - [Fill PDF form fields programmatically on iOS](/guides/ios/forms/form-filling.md) - [Form field support in our iOS viewer](/guides/ios/forms/fill-form-fields/using-the-ui.md) - [Undo and redo for PDF forms on iOS](/guides/ios/forms/fill-form-fields/undo-and-redo.md) - [Understanding PDF forms and their benefits](/guides/ios/forms/introduction-to-forms.md) - [Store PDF form data on iOS](/guides/ios/forms/introduction-to-forms/data-formats.md) - [Supported PDF form fields on iOS](/guides/ios/forms/introduction-to-forms/form-fields.md) - [Save and submit PDF Forms to Document Engine on iOS](/guides/ios/forms/submit-or-save/to-document-engine.md) - [Submit and save PDF forms to external destinations](/guides/ios/forms/form-submission.md) - [Embed data into PDF forms on iOS](/guides/ios/forms/submit-or-save/embed-data-into-pdf.md) - [Submit and save PDF forms to custom destinations](/guides/ios/forms/submit-or-save/to-custom-destination.md)