Can I un-flatten a document?

No. Flattening is irreversible. Keep a copy of the interactive version before applying.

What is the difference between saving and flattening?

Saving preserves interactive fields. Flattening destroys them — the result is a static image of the form, not an editable form.

Are digital signatures affected?

Yes. Flattening renders signature appearance into pixels, which invalidates the cryptographic signature. Apply only to forms where the signature appearance no longer needs to be verified.

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protect / Flach machen

Flach machen

Formulare, Annotationen und Ebenen einbrennen.

Fügen Sie mindestens ein PDF im Dateifach hinzu.

Weitere Tools entdecken

Methodik & Technische Transparenz

Verwendete Bibliotheken

pdf-lib — Kern-PDF-Konstruktions- und Bearbeitungslogik
pdf.js — PDF-Rendering und Seitenrasterung

Speicher-Strategie

Nach jeder Operation wird URL.revokeObjectURL() sofort aufgerufen. Alle pdf.js-Dokument-Handles werden über pdfDoc.destroy() gelöscht. Worker werden bei Abschluss oder Komponenten-Unmount beendet.

Wir garantieren keine dauerhafte Speicherung von Dateien (da wir diese nicht speichern). Die lokale Verarbeitung passwortgeschützter PDFs wird nicht unterstützt.

Key Features

Burn interactive fields to static content
Form fields, checkboxes, and text inputs are rendered into the page as permanent visual elements.
Annotations and layers
All PDF annotations (comments, stamps, ink) and optional content layers are merged into the base page.
Print and archive ready
The flattened PDF renders identically in every viewer and prints consistently — no renderer variations.

Common Use Cases

Used to finalise filled application forms before submission, create print-ready files from form-based designs, or archive completed contracts that must not be altered.

Frequently Asked Questions

Can I un-flatten a document?: No. Flattening is irreversible. Keep a copy of the interactive version before applying.
What is the difference between saving and flattening?: Saving preserves interactive fields. Flattening destroys them — the result is a static image of the form, not an editable form.
Are digital signatures affected?: Yes. Flattening renders signature appearance into pixels, which invalidates the cryptographic signature. Apply only to forms where the signature appearance no longer needs to be verified.