Merge AVIF to PDF

What is merging AVIF to PDF

Merging AVIF to PDF is the process of assembling several separate AVIF images into a single document where each input file becomes its own page in the resulting PDF. The input is a set of AVIF files of varying size and proportions; the output is a single document in which pages appear in the order you set during upload.

AVIF is a modern image format released by AOMedia in 2019 and based on the AV1 video codec. It is royalty-free and offers compression roughly 50% more efficient than JPG and 20 to 30% better than WebP at comparable visual quality. AVIF supports 8-, 10-, and 12-bit color depth, high dynamic range (PQ and HLG), wide color gamuts, transparency, and animation. The extension is .avif and the MIME type is image/avif. Browser support: Chrome 85+, Firefox 93+, Safari 16+. AVIF is widely adopted by large platforms for web images and thumbnails.

Despite its excellent compression characteristics, the format is young and is not always opened correctly on older operating systems, corporate document readers, previous-generation office suites, and built-in image viewers on older smartphones. Because of this compatibility gap it is often necessary to turn a set of AVIF files into one universal PDF that opens identically everywhere - in a browser, on any phone, on a kiosk terminal, in the internal reader of a bank or government portal.

Merging preserves the logical sequence of images, and the result is easier to work with: a single file is simpler to forward, attach to an email, drop into a folder, print with one command, or upload to cloud storage. Merging AVIF to PDF is used for delivering web material packages, archiving shots from modern cameras and phones, building portfolios from web images, and preparing collections of screenshots and illustrations. A typical scenario: a designer saved a series of covers and previews in AVIF, but the client needs them as one attachment that opens on any device - assembling everything into one PDF is then the natural choice.

Why a PDF made from AVIF is better than a stack of separate files

The key practical difference: AVIF is an efficient but not yet universal image format, while PDF is a document that is expected in most scenarios of formal communication, exchange, and archiving. When you need to guarantee that the recipient will see the content without a discussion about which program to use to open a .avif file, it is easier to assemble the set into a PDF once and stop worrying about compatibility.

When merging AVIF to PDF is convenient

Delivering web materials to clients and contractors

Web studios and freelancers save mockups, banners, article previews, and illustrations in AVIF because the format saves up to half the weight compared to JPG and speeds up page loads. But when it is time to send a visual package to a client who checks email on a work computer running an older operating system, or on a corporate smartphone, it is more convenient to assemble the AVIF set into a single PDF. The client sees the entire package as one document, flips through the pages, and leaves comments on each screen, without having to install anything or look for an AVIF viewer.

Archiving shots from modern cameras and smartphones

Some modern cameras and smartphones save photos directly in AVIF to save space. Over time such files accumulate in the gallery, and for long-term storage it is convenient to gather them into themed PDF albums: a trip, a birthday, a reporting month, a home renovation. A single PDF document takes up one record in file storage and opens on any device, while a set of separate AVIF files may turn out to be unreadable on an older laptop or a relatives' tablet.

Preparing a portfolio of web images

Designers, illustrators, photographers, and motion artists often save works in AVIF so that they can be published on a website without slowing pages down. When it comes to sending a portfolio to a client, a competition jury, or a school, it is more convenient to gather a curated selection of works into one PDF document in the right order: the strongest works first, the rest later. A PDF looks coherent and flips like a familiar portfolio document rather than a stack of unrelated files.

Collections of web screenshots and illustrations

A series of screen captures from a website, web app, or interface is often saved as AVIF by modern capture tools. Combined into a PDF, they make a convenient explanatory document for a bug report, an illustration of a specification, training material, or a write-up of user testing. The document is easy to scroll through top to bottom, and comments can refer to specific page numbers.

Documentation and presentations with web graphics

If the visual assets for a presentation, a report, or a training course are stored in AVIF, it makes sense to compile them into a single PDF illustration set. The resulting file can be attached to a mailing, to a project card, or to seminar materials. Each page is one illustration, and the thumbnail navigation in a PDF reader replaces working with a folder of images.

Submissions to government services and banks

Many government services and banks explicitly require that a package of materials be presented as a single PDF file. If all you have are AVIF images (for example, ones saved automatically from a mobile browser), merging into a PDF becomes a mandatory step, and without it the submission may not be accepted. The recipient will open the PDF in an internal reader anyway and will not depend on whether their system supports the AVIF format.

How merging works

Upload two or more AVIF files to the service page, optionally rearrange them by dragging, choose the page size of the output PDF (A4, Letter, A3, A5, Legal, or auto-fit to the image), the orientation (portrait, landscape, or auto), and the margin size. The output is a single PDF that you download to your device immediately. No registration is required, and the result has no watermarks.

Page-order control

After upload, the AVIF files appear as a list. Each file has a drag handle next to it: move a file up to bring it closer to the start of the document, or down to push it toward the end. The order of files in the list matches exactly the order of pages in the resulting PDF. If an image ended up in the list by accident, you can remove it before starting the merge. This control is especially valuable for material packages where order matters: cover first, then key works, then supplementary items, not the other way around.

Page size

When building a PDF from a set of AVIF files, it matters which size the resulting pages will have:

In fixed sizes the image is scaled and centered on the page with white margins - the page has familiar proportions and any printer outputs it on a standard sheet. In auto-fit mode the page exactly mirrors the proportions of the source image, which is convenient for albums where you do not want to see empty borders around the picture.

Orientation and margins

Orientation is chosen at the merge stage: automatically based on the content of each image, forced portrait, or forced landscape. In auto mode vertical images become vertical pages and horizontal ones become horizontal pages, so the document looks natural. The margin size is set separately: none (image flush to the edges), small, normal, or large margins - depending on whether you are preparing an album-style set or an official document for printing.

Password protection

Before the merge you can set a password to open the resulting PDF. The recipient will be able to view the content only after entering this password. This is convenient for forwarding sensitive material: working mockups, unpublished web pages, internal corporate illustrations. The password should be communicated to the recipient over a separate channel.

Image quality

The core principle of the merge is to preserve visual quality. Each AVIF in the set is decoded and placed into a PDF page without unnecessary re-compression: colors, fine gradients, small details, and transparency effects remain the same as in the source file. So if you have a high-resolution image, in the resulting PDF it will look just as good on screen and when printed on A4 or larger.

The size of the resulting file depends on the source AVIFs: AVIF is already well compressed, and when packaged into a PDF the result usually ends up slightly larger than the sum of the input file sizes because of the internal PDF structures. If a smaller output is important, you can prepare slightly smaller source AVIFs upfront.

Which AVIF files work best for merging

For a PDF album or web-material collection, uniformity matters more than raw resolution. It is better when all images are taken in roughly the same orientation, with similar exposure, and with comparable proportions. The document then looks like one cohesive piece instead of a patchwork from different sources.

That said, the service will happily merge a heterogeneous set: some images from one site, some from a mobile browser, some screenshots. The result will simply look visually mixed: a vertical image on one page, a horizontal one on the next, then an interface screenshot. This is fine for working documents and bookmark collections, but for a presentation album it is better to first bring the images to a uniform style in an image editor - balance brightness, crop edges, rotate as needed.

Good candidates for merging:

• mockups, banners, and web covers in AVIF;
• article previews, product cards, social media images;
• illustration sets for articles, long reads, and case studies;
• screen captures of websites and web apps saved as AVIF;
• photos from modern cameras and smartphones that save in AVIF by default;
• frame sets from animations and motion reels;
• portfolio selections of illustrators and designers;
• web images saved from current websites onto the device.

If the set contains very high resolution images and you are preparing the document for on-screen viewing, it is worth pre-shrinking them to 200 to 300 dpi in an image editor: for working documents this reduces the resulting PDF size without visible loss of quality.

Benefits of the resulting PDF

Universal viewing

PDF opens in any modern browser: Chrome, Firefox, Safari, Edge, Yandex Browser, in email clients, in office suites, and in built-in readers on smartphones and tablets of any age. The recipient does not need to verify whether their system supports AVIF, and does not need to install extra software. This removes the main risk of working with a young format: wherever you send the PDF, it will open as expected.

Page navigation

PDF has a built-in thumbnail panel and page numbering. The recipient sees at a glance that the document has, say, 12 pages and can jump to the right one by clicking the thumbnail. With separate AVIF files this does not work: you have to open files one by one, navigating only by file name, and periodically you run into the fact that one of them is not supported by the viewer at all.

Printing

A single PDF prints with one "Print" command. The printer arranges the pages itself and respects the chosen order. With a set of AVIF files you either open and print each one separately, or assemble them into an auxiliary document - and many image viewers do not yet print AVIF correctly. PDF removes that issue: you get a predictable print result on any printer.

Tidy archiving

In a document management system, in cloud storage, or in an internal company wiki, it is more convenient to keep one PDF with a meaningful name than a folder of 15 AVIF images whose openability on older systems is questionable. Search by name and tags works at the document level, not at individual files, and sorting by date produces one record instead of a dozen.

Option to protect the document

The PDF standard includes protection features: open password, restrictions on printing and copying. After images have been combined into a PDF, these features become available - at the merge stage you can set a password, or later add the protection level you need through dedicated PDF editing software. With a set of separate AVIF files that does not work: each file would have to be protected individually (which is awkward for the recipient) or not at all.

Limitations and practical tips

Before uploading, it is worth checking and preparing the files:

• make sure all files are actually in AVIF format and not in WebP, HEIC, PNG, or JPG. For those formats there are dedicated converters and merge operations, and you can first bring the images to the right type and then work with the PDF;
• check that there are no accidental screenshots or duplicates among the images - they will also become pages in the resulting PDF, and you would have to rebuild the set later;
• if there are very many images (several dozen), it may make sense to split them into thematic groups and assemble several smaller PDFs instead of one huge one, so that the recipient can forward and store them more easily;
• when working with confidential material, use a password to open the resulting PDF and send the file over secure channels;
• remember that AVIF supports transparency: if an image has transparent areas, in the PDF they will appear over the page background (white by default), so check in advance that the final page will look the way you intend.

The service is suitable for everyday tasks: assembling web materials into one package, archiving AVIF shots, building portfolios, and collecting screenshots. For specialized tasks - book layout, professional offset printing with color correction, multi-page reports with interactive forms - use professional PDF authoring software, where finer settings of fonts, margins, and color profiles are available.