How to Flatten PDF — 3 Simple Steps
1
Upload the PDF with form fields or annotations to flatten.
2
Choose what to flatten: form fields, annotations, or both.
3
Click 'Flatten' and download your finalized PDF.
Why Flatten PDF with LittlePDF?
- Converts interactive form fields and annotations into permanent static content in one click.
- Reduces file size by eliminating editable layers, JavaScript, and embedded font subsets.
- Ensures your PDF looks identical on every device and in every viewer — no rendering surprises.
- Free and browser-based — no Acrobat or desktop software required.
Features
Selective Flattening
Choose to flatten form fields only, annotations only, or both. Keep interactive elements you still need while locking down the rest.
Consistent Rendering
Flattened PDFs render identically in Acrobat, Preview, Chrome, and mobile readers. No more missing fonts or shifted form values.
File Size Reduction
Removing editable layers, JavaScript actions, and unused font glyphs often shrinks the file by 10-30%, making it lighter to email or archive.
Frequently Asked Questions
Processed locally. Text/PDF never leave your device.