DartPDF

DartPDF runs on Android, iPhone, iPad, Mac, Windows, and Linux, plus a web app at app.dart-pdf.com that you can open in any browser. There is no account to create on any of them.

No. Editing, annotation, signing, and OCR all happen on your device, and there is no account or telemetry. Your PDFs only leave your machine if you choose to share them yourself.

Yes. It fills AcroForm fields including flat non-interactive forms, supports drawn signatures, and saves a checked copy. It also handles standards-based digital signatures with trust-store chain validation, and its incremental-save editing preserves existing signatures.

Yes, with two options. Native apps can use the optional on-device OCR engine, which downloads a small text-recognition model once and adds searchable text layers fully offline. Web, mobile, and desktop can also use an HTTP-based OCR engine that talks to a compatible text-detection service.

Yes. You can insert one PDF into another from the app menu or by dropping files onto the thumbnail strip, with each insert as a single undo step. Reduce file size offers a Lossless pass plus Screen, eBook, and Print presets with adjustable DPI and JPEG quality, showing before and after sizes before you save.