Merge AVIF to PDF

How to Merge AVIF Images to PDF Online

1. Upload Your AVIF Files: Drag and drop or click "Choose Files" to add multiple .avif images. Drag thumbnails to reorder pages before merging — the PDF preserves the order shown in the file list.
2. Pick Combine Mode and Paper Size: Default is Single PDF on A4. Switch to Individual PDFs to output one PDF per image, or choose Letter, Legal, Tabloid, Executive, A3, A4, ISO B4, ISO B5, ARCH A, ARCH B, Ledger, or Same as image size from the Paper Size dropdown.
3. Set Layout, Margins, Placement, and Alignment (Optional): Page Layout is Portrait by default — switch to Landscape for wide photos. Margin defaults to Narrow (0.5"); other presets are No margin (0"), Moderate (0.75×1"), Normal (1"), and Large (2×1"). Image Placement is Contained (fits whole image inside margins, may leave whitespace) or Cover (fills the page, may crop edges). Image Alignment is Top, Center, or Bottom.
4. Tune Quality and Compression, Then Merge: Image Quality slider runs 1–100% (default 75%). PDF compression presets are Screen (Best, smallest), Ebook, Default, Prepress, and Printer (highest quality print). Image Transparency is Unchanged or Removed (flattens to white). Click "Merge" to produce the PDF — files process in your browser session, no sign-up, no watermark.

Why Merge AVIF to PDF?

AVIF (AV1 Image File Format) was published as a v1.0.0 specification by the Alliance for Open Media on February 19, 2019, and now ships natively in Chrome 85+ (Aug 2020), Firefox 93+ (Oct 2021), Safari 16+ (Sep 2022), and Edge 121+ (Jan 2024). It compresses roughly 50% smaller than JPEG at matched quality, which is why image hosts and CMS pipelines increasingly serve photos as .avif. The downside: a recipient on Windows 10, an older Mac, an LTS Linux desktop, or any printing/proofing workflow may not have a viewer that opens AVIF at all. Bundling the images into a PDF — defined by ISO 32000-1 (PDF 1.7) and ISO 32000-2 (PDF 2.0) — makes the document open in every browser and every PDF reader without re-encoding the photos to a lossier format.

• Photo albums and portfolios — Combine 20–50 AVIF photos into a single browseable PDF for clients, family, or hiring committees. Set Image Placement to Contained with Center alignment so portrait and landscape shots both sit cleanly on the page.
• Print-ready proofs from web sources — Designers downloading AVIF assets from stock libraries or modern CMSes need PDFs for client review and print shops. Use the Prepress or Printer compression preset to keep image fidelity high; commercial printers typically expect 300 DPI, so pair with the Same as image size paper option for full-resolution output.
• Email and chat attachments — Most messaging and email clients still don't render AVIF inline. Merging to PDF with the Screen preset produces a single attachment that fits comfortably under common 25 MB caps (Gmail's documented attachment limit) versus sending 30 separate .avif files that recipients can't preview.
• Archival and version control — A merged PDF is a single hashable artifact suitable for SharePoint, Dropbox versioning, or Git-LFS. PDF/A-compatible readers also let archivists embed the original images for long-term preservation, where AVIF support in legacy DAM systems is uneven.
• Replacing scanner output — Phones now capture HEIF/AVIF document scans by default. Stack receipts, contracts, or whiteboard photos and merge with Cover placement plus Letter/A4 paper to mimic flatbed scanner output for expense reports or compliance filings.
• Sharing AI-generated AVIF artwork — Image generators increasingly export AVIF for size. Merging a series into one PDF preserves the sequence (concept sketch → final render) and prevents recipients from missing files in a zip.

AVIF vs PDF — Format Comparison

PDF Compression Preset Quick Guide

If your PDF still ends up too large after merging, run the result through Compress PDF for a second pass, or pre-shrink the source images with Compress AVIF before merging.

Frequently Asked Questions

Why does my AVIF file viewer fail on Windows 10 but work on my phone?

Windows 10 does not ship an AVIF decoder by default — users have to install the AV1 Video Extension from the Microsoft Store. iOS 16+ and macOS Ventura+ decode AVIF natively. Merging to PDF sidesteps the issue entirely because every Windows 10 install ships with at least Edge (which reads PDF) and the built-in Reader.

Should I pick Cover or Contained placement?

Contained (default) fits the entire image inside the page margins, which means landscape photos on a portrait A4 page will leave white bands top and bottom but every pixel is preserved. Cover scales the image to fill the page and crops whatever spills outside the margins — use it for full-bleed photo albums where you don't mind losing a sliver from the edges. For portfolios and presentations Contained is usually safer.

Which paper size should I choose for a printable photo album?

A4 (210×297 mm) for most of the world, Letter (8.5×11 in) for the US and Canada. If you want the PDF to keep each photo at native resolution without any scaling, pick "Same as image size" — the page dimensions then match each image's pixel dimensions, which is useful when you'll display on screen rather than print.

Will I lose AVIF's compression advantage by going to PDF?

Yes, partially. PDF doesn't natively store AV1-coded images, so the merger re-encodes each AVIF frame into a JPEG- or Flate-compressed stream embedded in the PDF. At the default 75% Image Quality and Screen compression preset the resulting PDF is typically 1.5×–3× larger than the sum of the source AVIFs, but still smaller than the same images converted individually to JPEG and merged.

Can I mix AVIF with JPG or PNG in one PDF?

Not from this tool — it only accepts .avif inputs. To merge a mixed set, first convert AVIFs to JPG with AVIF to JPG (or convert JPGs to AVIF), then use Merge JPG to PDF. If your set is mostly iPhone photos, Merge HEIC to PDF accepts the iOS native format directly.

Does the tool preserve transparency from AVIF?

AVIF supports an alpha channel. Image Transparency defaults to Unchanged, which keeps the alpha and lets the PDF page color (white) show through. Set it to Removed to flatten to a solid white background — useful if you're printing and don't want unexpected anti-aliasing artifacts at the alpha edges.

Why does my merged PDF look pixelated when I zoom in?

Either the source AVIFs were already low-resolution (a 1024-pixel-wide AVIF will look soft on an A4 page), or the Image Quality slider was lowered. For printable output, keep Image Quality at 90–100% and use the Prepress or Printer compression preset. For pure on-screen viewing, the 75% default with Screen compression is usually indistinguishable from the source.

Can I add page numbers, a cover page, or a table of contents?

Not directly during the merge. Run the output through a PDF editor afterward — most desktop PDF tools (and many free online ones) add page numbers and bookmarks. For a single PDF that just collates photos, the merge tool's reorder-by-drag controls give you the page sequence; for richer layout, export to PDF from a page-layout app instead.

Are my files uploaded to a server?

Files leave your browser only for the merge operation and are not retained beyond the active session. There is no account requirement, no email gate, and no watermark added to the output PDF.