Watermark PDF API for Developers

    Feature

    Add DRAFT / CONFIDENTIAL / branded watermarks to protect and identify documents.

    Use cases

    Where watermark helps

    • Mark drafts during review
    • Stamp CONFIDENTIAL for sharing
    • Overlay company logo on every page
    • Tiled watermarks across entire pages
    • Apply cohort / term branding
    • Watermark images (photos, screenshots)
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    Parameters

    What you control

    file_url / file
    required

    Watermark by URL or upload a file.

    text
    optional

    Watermark text. Defaults to CONFIDENTIAL if no image provided.

    watermark_image_url
    optional

    URL to a logo/image to overlay instead of text (PNG/JPG).

    color
    optional

    Hex color for text watermark. Default #000000.

    opacity
    optional

    0.0–1.0 (default 0.15).

    angle
    optional

    Rotation in degrees (default 30).

    position
    optional

    center, top-left, top-right, bottom-left, bottom-right, top-center, bottom-center.

    mode
    optional

    single (default) or tiled (repeats across page).

    output_format
    optional

    file / url / base64 / both

    Sandbox

    Apply a text watermark

    Result

    Preview, response, and cURL command