pdf24 WEBP to PDF under 15 KB, made in your browser

pdf24 WEBP to PDF under 15 KB builds one PDF from your WEBP files and keeps resizing the pictures until the file is 15 KB or smaller. Everything happens on your device.

or drop files here

Limit 15 KB · JPG, PNG, WebP, HEIC, TIFF · on your device

  • Free, no sign-up
  • Files stay on your device
  • No watermark added
  • Works on phone and computer

By the pdf24tools team · Updated

How to use pdf24 WEBP to PDF under 15 KB in 4 steps

  1. Choose the pictures. Tap Choose images and select one or more files. They become pages in the order shown; arrows reorder them.
  2. Check the options. A4 with a small margin is the default, and 15 KB is already set as the maximum size.
  3. Press Convert to PDF. When the first PDF is too big, pictures are scaled down and re-encoded as JPEG until the file fits.
  4. Download and check. The result line shows the final size next to the 15 KB limit. Zoom in to check small print.

How many WEBP files fit in 15 KB with pdf24 WEBP to PDF under 15 KB?

A phone photo is often 3 to 4 MB, so each picture must lose pixels and JPEG quality to fit 15 KB. In our tests a document photo stayed readable at about 25 to 40 KB, which means 15 KB holds around 1 readable pictures. Plain text documents shrink better than busy photos.

Budget per picture at 15 KB (limit divided by picture count)
PicturesBudget per pictureReadability
115 KBToo small to read
28 KBToo small to read
35 KBToo small to read
53 KBToo small to read
102 KBToo small to read

pdf24 WEBP to PDF under 15 KB for ID cards and certificates

One card or certificate per page reads well even at small sizes. Photograph it flat, in daylight, filling the frame.

pdf24 WEBP to PDF under 15 KB for multi-page documents

Shoot each page straight on and keep the order; the arrows in the file list fix the order before converting.

pdf24 WEBP to PDF under 15 KB on iPhone

HEIC photos from an iPhone are accepted and converted on the device, so you do not need to change the camera format first.

pdf24 WEBP to PDF under 15 KB: a tip for dark photos

Noise from dark photos takes space after compression. Shoot in good light and the same 15 KB limit keeps more detail.

What did pdf24 WEBP to PDF under 15 KB reach in our tests?

Conversion to a PDF under 15 KB was measured on 2026-10-17 with 12-megapixel phone photos: one photo of 3,687 KB became a 42 KB PDF at a 50 KB limit, and three photos of 11,062 KB fitted 124 KB at a 200 KB limit. Results depend on how busy the picture is.

pdf24 WEBP to PDF under 15 KB: Measured PDF sizes from phone photos at a 15 KB limit
PDF size from 12-megapixel phone photos, measured 2026-10-17.
PicturesOriginalLimitResult
1 phone photo3,687 KB50 KB42 KB
1 phone photo3,687 KB100 KB42 KB
1 phone photo3,687 KB200 KB110 KB
2 phone photos7,375 KB50 KB36 KB
2 phone photos7,375 KB100 KB83 KB
2 phone photos7,375 KB200 KB83 KB
3 phone photos11,062 KB50 KB36 KB
3 phone photos11,062 KB100 KB54 KB
3 phone photos11,062 KB200 KB124 KB

“JPEG is a commonly used method of lossy compression for digital images, particularly for those images produced by digital photography.”

Which formats does pdf24 WEBP to PDF under 15 KB accept?

Conversion to a PDF under 15 KB accepts JPG, JPEG, PNG, WebP, GIF, BMP, HEIC, TIFF and SVG pictures. PNG transparency turns white, a multi-page TIFF adds every page, and every picture is re-encoded as JPEG when that is needed to stay within the 15 KB limit.

  • WebP is a newer web format; browsers decode it natively, so it converts on your device.
  • Any picture your browser can open works, plus HEIC and TIFF, which the page decodes itself.
  • Need another limit? See all image to PDF limits.

pdf24 WEBP to PDF under 15 KB works in Chrome, Edge, Firefox and Safari on Windows, macOS, Linux, Android and iOS.

pdf24 WEBP to PDF under 15 KB: frequently asked questions

Is pdf24 WEBP to PDF under 15 KB free?

Yes. Converting WEBP files to a PDF under 15 KB costs nothing here, with no account, no watermark and no limit on the number of files. The work runs in your browser, so there is no upload queue and no waiting list either, even with dozens of photos.

Will pdf24 WEBP to PDF under 15 KB lower the quality?

Only as much as the 15 KB limit needs. The tool starts with mild settings and stops at the first step that fits, so a generous limit keeps nearly all of the detail and a strict one trades resolution for size. The final size is always shown before you save.

Can pdf24 WEBP to PDF under 15 KB put several pictures in one file?

Yes. Add as many pictures as you like; each one becomes a page in the order shown, and the arrows change the order. The 15 KB limit applies to the whole PDF, so more pictures means less room for each one, and very strict limits suit one or two pictures.

Does pdf24 WEBP to PDF under 15 KB upload my pictures?

No. The pictures are read and converted on your own device by the browser, and the result line reports 0 bytes uploaded. Nothing is stored, so there is nothing to delete when you close the tab. The same is true on phones, tablets and computers.

pdf24 WEBP to PDF under 15 KB: sources