Images → PDF Multi-page Never Saved to Disk

Convert WebP to PDF

Drop WebP images here and get one PDF back, a page per image in the order you added them, up to 20 files at a time on a paid plan or Day Pass (3 on the free plan). Each image is stored in the PDF as a standard JPEG, so the document opens in any PDF reader, mail client or print shop, including the ones that will not open a .webp file. The PDF is built in memory at api.mochify.app and wiped as soon as your download is ready.

How to convert WebP to PDF

1

Add your images

Drop in WebP files, or mix in PNG, JPG, AVIF, HEIC or JXL; each becomes one page, in the order you add them.

2

Pick a page size

Pages fit each image exactly by default, with no white border. Choose A4 or Letter if the PDF is headed for a printer. There is nothing else to set: this page does one job.

3

Download the PDF

One file, ready to send.

What is in the PDF

A PDF cannot hold WebP data, so each image is decoded and re-encoded as a high-quality JPEG with jpegli, then placed on its own page. The pages look the same on screen and print cleanly, but they are not the original WebP pixels, and two things change:

  • Transparency turns white. JPEG has no alpha channel, so the transparent parts of a logo, sticker or cut-out come out white. If that matters, send the WebP or a PNG alongside the PDF; Do WebP and AVIF support transparency? explains where a cut-out survives.
  • Page size follows the image. Every pixel is kept, so by default a large screenshot makes a large page. Choose A4 or Letter for a document meant for paper.

The PDF carries the pictures only, with no WebP data and no metadata, so keep the originals if you need them.

When WebP to PDF is the right move

WebP is built for web pages and travels badly: plenty of mail clients, print shops and upload forms still refuse a .webp. A PDF opens anywhere and holds a set of images as one file in a fixed order: screenshots for a document, designs for a client, receipts, printer proofs, a portfolio. If you only need one image that opens anywhere, a JPG is lighter: How to save WebP as JPG in Chrome covers every route.

Converting WebP to PDF on Windows, Mac or iPhone

For a single image, the tools already on your device will do it:

  • Windows: open the WebP in your browser or the Photos app, press Ctrl+P and choose Microsoft Print to PDF.
  • Mac: open the WebP in Preview, then File, Print, and Save as PDF.
  • iPhone or iPad: in the Files app, select the images, tap More and choose Create PDF.

For a batch, a mix of formats, or a computer where you cannot install anything, drop the lot here and get one PDF in any browser.

Limits, bulk and automation

Your first PDF needs no account. Without an account or on a free account, a PDF can hold up to 3 images; every paid plan, Growth included, and the Day Pass take up to 20 images per PDF on this page.

Building a PDF from images is also available on the hosted MCP server and the REST API, through POST /v1/pdf; full reference in the API documentation. Through the API, Growth builds PDFs from up to 200 images. Every route builds the PDF at api.mochify.app in memory, keeps nothing on disk and writes no logs containing your data.

To build the same PDF from a script, send the images with op=create; each image becomes one page, in the order you send them:

curl -X POST "https://api.mochify.app/v1/pdf?op=create" \
  -H "Authorization: Bearer $MOCHIFY_KEY" \
  -F "images=@page1.webp" \
  -F "images=@page2.webp" \
  -F "images=@page3.webp" \
  --output pages.pdf

Add page=a4 or page=letter for a standard sheet. Building a PDF from images works on every plan, including Free.

Frequently asked questions

Is this WebP to PDF converter free?
Yes. Without an account or on a free account, you can build a PDF from up to 3 images. A paid plan, or a $2 Day Pass with no account, takes up to 20 images per PDF; the pricing page has the plans.

Do I need an account?
No. WebP to PDF works without signing up, within the same free limits as any other conversion, and a PDF can hold up to 3 images. A free account gives you more conversions each month, not more pages per PDF; a paid plan or a Day Pass takes up to 20 images per PDF.

How many images can I combine?
Up to 20 per PDF on any paid plan, Growth included, and on a Day Pass. The free plan takes 3, with or without a free account. Each image becomes one page, in the order you add them.

Does converting WebP to PDF reduce quality?
Slightly, and rarely visibly. A PDF cannot hold WebP data, so each image is re-encoded as a high-quality JPEG with jpegli before it goes on the page. Pages look the same on screen and print cleanly, but they are not the original WebP pixels, so keep the WebP files if you need them untouched.

What happens to a transparent WebP?
The transparent areas turn white. Images inside these PDFs are JPEGs, and JPEG has no alpha channel. If you need the cut-out kept, send the WebP or a PNG alongside the PDF.

Can I mix WebP with other formats?
Yes. Add PNG, JPG, AVIF, HEIC or JXL files alongside your WebP images; each becomes one page, in the order you add them.

What page size do I get?
Each page fits its image exactly by default, with no border. Choose A4 or Letter after adding your files if you are going to print.

What happens to my files?
They are sent to api.mochify.app, the PDF is built in memory, and the images are discarded once the PDF is returned. Nothing is written to disk, no logs contain your data, and your files are never used to train AI.

Also available

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AI cutouts with a transparent WebP output

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HEIC and HEIF to PDF →

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JPEG XL to PDF →

Combine JPEG XL images into a single multi-page PDF