PDF Document Processing Using Syncfusion Flutter PDF Library
Create, edit, and save PDF documents (.pdf) using the Syncfusion Flutter PDF library. This skill supports generating Dart code snippets for Flutter projects targeting mobile, web, and desktop platforms.
Generate Dart Code for the User's Flutter Project *(default)*
Trigger keywords: "show me how", "how to", "how can I", "how do I", "provide code", "provide an example", "give an example", "demonstrate", "code snippet", "sample code", "example", "sample", "give me", "show me", "main.dart", "example code", "generate code for", "codesnippet".
Workflow:
Step 1 — Detect the Platform and Suggest the Correct Package
- Inspect the workspace project files (
pubspec.yaml,main.dart, etc.) to identify the Flutter platform target (mobile, web, desktop). - Tell the user to add
syncfusion_flutter_pdfto theirpubspec.yamlbefore generating any code.
Step 2 — Generate Code from Reference Files Only
Do NOT invent, guess, or suggest any API, class, method, or property not explicitly present in the reference files.
- Read the relevant
references/*.mdfile(s) for the requested feature - Build Dart code strictly from the APIs and snippets found in those files
- Use the correct save/launch pattern for the target platform:
- Mobile → getApplicationSupportDirectory() + OpenFile.open() - Desktop → getApplicationSupportDirectory() + OpenFile.open() - Web → base64 + JavaScript download or web package approach
- Do not create or run any standalone Dart script
Code References
All snippets are in the references/ folder:
| File | Contents |
|---|---|
| document-structure.md | Create/load document, page settings, orientation, margins, sections, save to file/stream, incremental update, compression, open encrypted PDF, dispose |
| pages.md | Add/insert/remove/rotate pages, get page count, set margins, sections with different page settings, get client size |
| flow-layout.md | Chain elements using PdfLayoutResult, paginate text across pages, PdfLayoutFormat options |
| text.md | Draw text (drawString, PdfTextElement), standard/TrueType/CJK fonts, RTL text, multicolumn text, pens and brushes |
| images.md | Insert JPEG/PNG images (PdfBitmap), apply transparency and rotation, insert from web URL |
| shapes.md | Draw polygon, line, curve, path, rectangle, pie, arc, bezier, ellipse |
| tables.md | Create PdfGrid, add columns/headers/rows, cell/row/column customization, built-in styles, pagination, multiple tables |
| lists.md | Ordered lists (PdfOrderedList), unordered lists (PdfUnorderedList), sub-lists |
| header-footer.md | Add headers and footers (PdfPageTemplateElement), automatic fields (page number, page count, date/time), composite fields |
| bookmarks.md | Add/insert/remove/modify bookmarks (PdfBookmark), child bookmarks, destination, color, text style |
| annotations.md | Rectangle, ellipse, line, polygon, URI, document link, text web link, text markup, popup annotations; flatten, modify, remove annotations; import/export FDF/XFDF/JSON |
| hyperlinks.md | Web navigation links (PdfTextWebLink), URI annotations, internal document navigation (PdfDocumentLinkAnnotation), destination modes |
| watermarks.md | Text and image watermarks with transparency and rotation, apply to all pages via PdfPageTemplateElement stamp |
| pdf-templates.md | Create PdfTemplate, draw templates on pages, extract page as template using createTemplate, stamp overlays with PdfPageTemplateElement |
| digital-signature.md | PdfSignatureField, PdfCertificate, sign new/existing PDF, signature appearance, external signer, multiple signatures, timestamp, LTV |
| text-extraction.md | Extract text (full/page/range), extract text lines/words/characters with bounds and font info, find text with MatchedItem |
| pdf-conformance.md | PDF/A-1b, PDF/A-2b, PDF/A-3b conformance levels, embedded fonts requirement, attachment relationships for PDF/A-3b |
| attachments.md | Add/remove file attachments (PdfAttachment), attach from base64, extract and save to disk, PDF/A-3b attachment metadata |
| layers.md | Add/toggle/remove layers (PdfPageLayer), nested layers (PdfLayer), visibility control, flatten layers |
| forms.md | AcroForm fields: text box, combo box, radio button, list box, check box, signature, button; fill/modify/flatten/remove fields; import/export FDF/XFDF/JSON/XML |
| encryption.md | RC4 and AES encryption, user/owner passwords, permissions (print, copy, edit), protect existing PDF, change/remove password |
Rules
- Output files go in
./output/directory - Temp
.dartscripts must be created inside{skill-root}/flutter/pdf/scripts/— never in the workspace root or customerscripts/folder - Never leave temp
.dartfiles after execution - Always call
document.dispose()after saving - All units in PDF are in points (not pixels)
- Use
PdfLayoutResultto chain elements and avoid content overlap
Prerequisites
- Flutter SDK installed
- Add to
pubspec.yaml:dependencies: syncfusion_flutter_pdf: ^xx.x.xx - Run:
flutter pub get - Import in Dart code:
import 'package:syncfusion_flutter_pdf/pdf.dart';