ImageConvert

Convert PDF to FITS

Turn PDF files into FITS in your browser. Drop your images below, choose your quality settings, and download the converted files — no registration, no watermark, no software to install.

  • Powered by IMAGICK
  • No sign-up
  • Up to 32 MB per file

Image conversion tool

PDF

Leave on auto-detect to let the server identify each file by its content.

FITS

Formats your server can actually write are listed here.

Drop your images here

or click to browse · up to 32 MB per file · 10 files per batch

Choose files
Conversion options

Applies to lossy formats: JPEG, WebP, AVIF, HEIC, JPEG XL.

Aspect ratio is preserved. Leave blank to keep the original size.

Automatic tries ImageMagick first and falls back to GD if it cannot handle the pair.

    Files are converted on our server and deleted automatically after 60 minutes.

    Why convert PDF to FITS?

    • FITS has no alpha channel, so transparency is flattened onto a solid background colour of your choice.
    • Your source is vector-based, so it is rasterised at a high density — 150 DPI by default — keeping edges sharp.
    • Conversion happens on demand and the result is deleted automatically, so nothing lingers.

    How to convert PDF to FITS

    1. 1

      Upload your PDF files

      Drag up to 10 files onto the drop zone, or click to browse. The format is verified from the file content.

    2. 2

      Confirm the target format

      FITS is already preselected. Adjust quality with the slider, and set a maximum width or height if the files are too large.

    3. 3

      Start the conversion

      Press Convert now. Each file is processed on the server and appears in the result list with its new size and dimensions.

    4. 4

      Download the results

      Save files one by one, or use Download all to grab the whole batch. Links stay valid for a limited time.

    PDF vs FITS at a glance

    PDF vs FITS at a glance
    Feature PDF FITS
    Extension .pdf .fits
    MIME type application/pdf image/x-fits
    Type Documents & print Raster images
    Transparency Yes No
    Animation No No

    Questions about converting PDF to FITS

    Is converting PDF to FITS free?

    Yes, completely free and without sign-up. There is a per-file size cap for server stability, but no daily quota.

    How long does PDF to FITS conversion take?

    Typically under a second per image. Large photos, RAW files and multi-page documents take longer because they must be fully decoded first.

    Which engine handles PDF to FITS?

    This pair is processed by IMAGEMAGICK. If you explicitly pick the other engine and it cannot handle the pair, the converter automatically falls back to the one that can.

    Does the FITS output keep transparency?

    Transparency support in FITS: No. When it is not available, transparent areas are composited onto the background colour you choose, white by default.

    Does converting PDF to FITS keep animation?

    FITS animation support: No. When frames cannot be preserved, only the first frame is written.

    Are my PDF files deleted?

    Yes. Both the upload and the converted output are deleted automatically after 60 minutes, and you can rely on the fact that access requires an unguessable random token.

    About this conversion

    PDF and FITS are both well-established image formats, but they were designed for different jobs. Knowing which one wins in which situation saves you both storage and headaches.

    On this server the pair is handled by IMAGICK, which decodes the source fully before writing the target. That matters for two reasons: colour profiles are applied consistently, and metadata such as EXIF orientation is baked into the pixels so the result is upright everywhere.

    If you need to go back the other way, the reverse conversion is available on its own page — and if you are unsure which format suits your use case, the format guides explain the trade-offs in plain language.