WEBP to PDF Converter

The WEBP Problem This Page Solves

Right-click "Save image as" on a modern website and you very often get a .webp file. Product photos, recipe pictures, news images and social media thumbnails are all commonly served as WEBP because the format is small. The trouble starts afterwards: plenty of upload forms, office printers and older document viewers do not understand WEBP at all. Converting those images into a PDF gives you a file that opens everywhere, prints predictably and can be attached anywhere that accepts documents.

This WEBP to PDF converter accepts one or many WEBP images and produces a single PDF with one image per page. You decide the order, paper size and orientation of each page. It is handy for saving a product comparison you collected while shopping, archiving web images as part of a research note, or turning a set of downloaded diagrams into a printable handout.

What Actually Happens to a WEBP File

The page in your browser handles previews and ordering only. When you press Convert Images to PDF, your WEBP files and their per-card settings are uploaded to the newisty.com server. Laravel checks each one (it must be a real image of an allowed type and no larger than 12 MB). The server then copies the files to a temporary folder and passes them to tc-lib-pdf, the PHP PDF library used across this site's PDF tools.

PDF has no native WEBP support, so the library decodes each WEBP image with PHP's GD extension and stores the pixels inside the PDF as lossless PNG-style data. The temporary WEBP copies are deleted as soon as the PDF is written. The PDF itself waits in a temporary folder under a random UUID-based name and is cleared by an hourly cleanup job once it is older than an hour.

Expect a Bigger File Than You Started With

This is the single most surprising thing about WEBP to PDF, so it gets its own section. A lossy WEBP photo is small because it throws detail away very efficiently. Once decoded and stored losslessly in the PDF, the same pixels take more room. A 150 KB WEBP product photo can easily become a PDF page several times heavier. Nothing is wrong; it is the cost of moving from a highly compressed web format to a lossless one.

The Quality box on each card does not help here, because lossless data is not affected by a JPEG quality setting. If the PDF must stay under a portal limit, convert large photographic WEBP files to JPEG with an image converter first, then make the PDF from the JPEG versions, which are embedded without being re-encoded.

Instructions

1. Collect your WEBP files in one folder and give them clear, unique names. Browsers often save several images with the same name, and the page skips a file whose name is already in the list.
2. Drop them on Drop images here or use Select Images.
3. Confirm each one appears as a card with a thumbnail and that the Images counter matches what you added.
4. Arrange the cards by dragging the grip handle. Remove strays with the Remove button.
5. In the Image to PDF Settings panel, choose Default Format (A4, A3, A5, Letter, Legal or Tabloid) and Default Orientation, then press Apply defaults to all images.
6. Press Convert Images to PDF. The status line shows "Generating PDF..." and then confirms success or explains the error.
7. Click Download PDF to save the result.

Layout on the Page

By default the image is scaled so it fits the chosen page entirely, its proportions are kept and it is centred. Web images are often modest in size, for example 800 pixels wide. Placed on an A4 page, an image like that is stretched to the full page width, so it can look soft when printed. That is a property of the source, not the converter; look for a larger version of the image if print quality matters.

Under Advanced options you can set W or H in millimetres to stop the enlargement and print the image at a smaller fixed size, with X and Y / Top setting the position of its top-left corner. For example, W = 120, X = 45, Y / Top = 40 on portrait A4 gives a 120 mm wide image centred horizontally near the top of the page.

The rest of the advanced panel (Type, Align, Page Align, Resize, Border, Fit Box, Link, Img Mask, Hidden, Is mask, Alt image), plus the Fit on page checkbox and the DPI box, is collected by the page but not used by the current server code. Only paper format, orientation, quality and the four position and size numbers influence the result.

Saving WEBP Images Properly First

Some sites deliver a different file depending on the browser, so the image you see may not be the one you saved. After saving, check the file extension and size on your device. A file that ends in .webp but is only a few hundred bytes is usually a placeholder or tracking image rather than the real picture, and it will produce a nearly empty page.

Animated WEBP

WEBP can be animated, like a GIF. The GD library that decodes WEBP for the PDF handles still WEBP images; animated WEBP files may be rejected or fail during conversion. If you need one frame from an animation, take a screenshot of the frame or export it as a still image first.

When to Use It, When Not To

Good fits

• Saved web images that must be submitted or printed as a document.
• Collections of reference pictures from several sites, kept together in one file.
• Mixed batches, since JPG, JPEG, PNG, GIF and BMP files can sit alongside WEBP in the same PDF.

Poor fits

• Tight file size limits; the lossless conversion inflates WEBP photos.
• Saving a whole web page with its text; use the HTML to PDF converter so the text stays selectable.
• Images you do not have the right to redistribute; converting does not change copyright.
• Private material you are not permitted to upload to a third-party server.

Known Limitations

Each image is limited to 12 MB, each one fills exactly one page, and there are no rotate, crop, margin or password options. The browser lets you pick AVIF or SVG files as well, but the server accepts only JPG, JPEG, PNG, GIF, WEBP and BMP, so those other types cause an error. The output name is random; rename it after download. To go the other way and turn PDF pages into WEBP images, use the PDF to WEBP converter.

Frequently Asked Questions