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JPG to PDF Under 400KB

Turn JPG images into one PDF and aim for 400 KB.

or drop images anywhere on this page

JPG only (.jpg, .jpeg) · select several at once · up to 50 MB each

  • Files never leave your device
  • Free, no sign-up
  • No watermark

How to convert JPG to PDF

  1. Choose one or more JPG files, or drag them onto the drop area. Only .jpg and .jpeg files are accepted.
  2. Check the order of the list. Use the arrows to reorder pages and Remove to take out any image you do not want.
  3. Confirm the target size (currently 400 KB). It is editable, so change the number or the KB/MB unit if your limit differs, and pick a page size.
  4. Press Create PDF. Your images are embedded as they are when that already fits; otherwise they are recompressed gradually and the PDF is measured after each attempt.
  5. Read the result: the actual PDF size is shown with a clear Target met or Target not met message. Then download the PDF.

What a 400 KB PDF limit means

Four hundred kilobytes gives enough room for a handful of readable pages or a good-quality single photograph. It is an in-between limit seen on several application systems. The converter keeps your JPEG data as is when possible, applies small quality and size reductions when it must, and checks the final PDF's byte size so the reported result is real. If the images are too heavy to reach 400 KB without harming legibility, the tool says so.

The size you enter is a goal, not a promise. A PDF made from JPEG images is almost entirely the size of those images, so the result depends on how many images you add, their resolution and how detailed they are. This tool measures the finished file and reports the true byte count instead of assuming success.

Format and page settings

Accepted input: JPG images (.jpg and .jpeg are the same format). Each image becomes one page, in the order shown in the list. Choose A4 or US Letter to fit each image on a page with a small margin, with portrait or landscape chosen automatically, or choose “Match image shape” for pages that follow each image's proportions. Images are never stretched or cropped. PNG, WebP, HEIC and other formats are not accepted here.

When the untouched JPEGs already fit the target, they are embedded without recompression. Otherwise quality is lowered in steps (not below about 50 percent) and dimensions are reduced only as far as roughly 800 px on the long side. Photos stored with an EXIF rotation flag are re-encoded upright, since PDF viewers ignore that flag.

Practical uses

  • Portal uploads that allow 'up to 400 KB' per attachment
  • Four- to six-page document bundles made from phone photos
  • A photo plus a signature combined for one form

Tips for a smaller PDF

  • Shoot documents flat and well lit; noisy low-light photos compress poorly.
  • Combine only pages you need, since every image adds to the total.
  • Use the page-size menu to control layout; it does not change file size much.

Frequently asked questions

How do I convert a JPG to a PDF under 400 KB?

Add your JPG files, keep or edit the 400 KB target, and press Create PDF. The tool builds the PDF in your browser and tells you the real size so you can see whether it is under 400 KB.

Does choosing A4 or Letter change the PDF size?

Barely. Page size affects layout, not image data, so file size is driven by your images.

Are my images uploaded anywhere?

No. Files are read and the PDF is generated entirely on your device. Nothing is sent to Paul Digital or any other server.

Can it guarantee the PDF will be under the limit?

No. The size depends on your images. The tool embeds JPEGs unchanged when possible, then lowers quality and dimensions only down to a readable floor. If that is not enough it reports the actual size and says the target was not met.

Can I combine several images into one PDF?

Yes. Select multiple files, reorder them with the arrows, remove any you do not need, and each image becomes one page in that order.

Is the PDF a normal, standards-compliant file?

Yes. It is a standard PDF 1.4 file with each JPEG embedded as an image on its own page. Nothing is truncated or padded to hit a number.

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Privacy

Your images are processed entirely in your browser on your own device. They are not uploaded to Paul Digital or any other server, and nothing is stored once you close the page.