QBMFX PDF
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QPDF · BOOK CENTER

Scan enhancer

Make ordinary document photographs easier to read by adjusting document contrast or choosing grayscale and black and white processing. This is useful for handwritten notes, shop forms and photocopy preparation. Review faint pencil marks, colored seals and fine text after conversion because stronger cleanup can remove details that matter to the customer.

100% freeNo loginFiles stay on your device

Use the arrows to put files in the order you want. Selecting more files adds them to this list.

    Choose your files and review the settings.

    Keep originals and inspect the result before printing. File changes clear previous downloads. Heavy image and OCR work can take longer on a phone.

    QUICK GUIDE

    Using Scan enhancer

    1. Choose document photographs.
    2. Select document, grayscale or black and white mode and adjust the threshold.
    3. Generate cleaned images and compare them with the originals.
    Read the detailed guide →

    Behind the result

    Document modes transform the existing image pixels. Grayscale removes color; black and white compares brightness against a threshold; document enhancement increases the separation between paper and ink.

    Free tools for everyday work

    Book centers, photocopy shops, freelancers and developers can use this workspace without a paid plan or account. Files are processed locally. Prepare website resources from offline setup before disconnecting; Urdu/OCR also needs the separate pack above.

    The Windows app currently includes the original four tools. These new Book Center tools are available on the website; app and extension updates will be separate releases.

    Answers and practical details

    Fine writing and stamps

    Start with a gentler setting for faint pencil, gray print and colored stamps. Compare the downloaded image with the source before printing.

    Price and account requirements

    This website tool is 100% free. No login, subscription or paid conversion tier is required. Your device supplies the processing memory.

    Files and privacy

    Input documents and generated results are handled locally. They are not sent to a QBMFX conversion API or stored in a customer database. Website hosting and advertising can still make separate network requests.

    Offline preparation

    Prepare the website resources from Help while connected, then test the required tool offline. OCR and Urdu text tools also need their optional language or font resources prepared first. Browser storage can be removed by the browser or by you.

    Windows app and Edge extension

    The existing installed app and extension contain the original four PDF tools. These new Book Center tools belong to the website release; they will need a separate installed-package update.

    Continue your workflow

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