Optimize Tools
Flatten PDF API Overview
Flatten PDF API is a tool that secures PDF documents by locking interactive elements and preserving their visual layout. It ensures form fields and annotations cannot be modified, while offering the ability to protect text from selection, copying, and extraction by converting it into vector paths. This makes the PDF fully read-only without compromising its original quality.
Lock Form Fields
Convert form inputs into static elements to prevent any further changes while keeping their original look.
Flatten Annotations
Turn annotations and widgets into non-interactive content without altering their appearance.
Protect Text Content
Stop text from being copied or extracted by converting it into vector shapes.
Preserve Document Quality
Maintain the original layout, sharpness, and vector precision even after flattening.
Make PDF Read-Only
Secure your file so no edits or interactions are possible while keeping it visually identical.
Boost Document Security
Eliminate unwanted modifications and safeguard sensitive data in your PDFs.
Customizable Parameters
Fine-tune your automation with these powerful conversion options
File
File Supported formats: .pdfFile to be converted. Value can be URL or file content.
Password
StringSets the password to open protected PDF.
FlattenControls
Bool Default: TruePrevent form controls such as text fields, checkboxes, and dropdowns from being edited by converting them into static page content while preserving their original appearance in the PDF.
FlattenWidgets
Bool Default: TruePrevent widget annotations such as buttons, list boxes, and signature fields from being interactive by converting them into static page content while preserving their original appearance in the PDF.
FlattenText
Bool Default: TruePrevent text selection, copying, and extraction by turning the textual symbols into vectorial paths to make the PDF read-only while preserving the original vectorial PDF quality.
StoreFile
Bool Default: FalseWhen the StoreFile parameter is set to True, your converted file is written to ConvertAPI’s encrypted, temporary storage and made available via a time-limited secure download URL, valid for up to 3 hours. After this period, the file is permanently deleted.
When StoreFile is set to False, conversion happens entirely in-memory. The raw file bytes are streamed back in the API response without touching disk or external storage, ensuring maximum security and zero persistence so that only you can access the content.
Integrate within minutes
Easy Flatten PDF automation using our simple REST-API
Businesses trust us
Highest rated File Conversion API on major B2B software listing platforms: Capterra, G2, and Trustpilot.
"ConvertAPI has been a game-changer for our document automation workflows. Their conversion accuracy and API reliability are unmatched in the industry for over 7 years."
"ConvertAPI is a reliable, cost-effective solution with a proven track record of stability. It has grown significantly in maturity, adopting enterprise-grade practices over the years."
"We've integrated ConvertAPI across our entire document processing platform. The performance is exceptional and the support team is always responsive. Highly recommended!"
Enterprise-Grade Security
We ensure that all document processing is handled securely in the cloud, adhering to industry-leading standards like ISO 27001, GDPR, and HIPAA. To enhance security even further, we can ensure that no files or data are stored on our servers and never leave your country.
Learn more about security