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Supports: PUB
.pub is the proprietary file format of Microsoft Publisher, a desktop-publishing app used for flyers, newsletters, brochures, and certificates — and almost nothing other than Publisher itself opens it cleanly. AVIF is a modern, AV1-coded still-image format built for the web. Converting .pub to AVIF renders each page of your publication to a compact, browser-ready picture, which is a practical way to preview or archive old Publisher artwork now that Microsoft is retiring the app. If you instead need an editable or print-faithful document, a PDF is the better target — see "When AVIF is the wrong choice" below.
| Property | Value |
|---|---|
| Full name | Microsoft Office Publisher Document |
| Developer | Microsoft |
| First released | 1991 (Microsoft Publisher) |
| Type | Binary, proprietary desktop-publishing format |
| Typical use | Flyers, newsletters, brochures, certificates, greeting cards |
| Opens in | Microsoft Publisher; partially in LibreOffice Draw and CorelDRAW |
| Editable text/layout | Yes, inside Publisher |
| Status | Being retired — perpetual Publisher loses support October 1, 2026 |
| Property | Value |
|---|---|
| Full name | AV1 Image File Format |
| Maintained by | Alliance for Open Media (AOMedia) |
| First released | 2019 |
| Codec / payload | AV1 still-image frame in an ISO-BMFF (HEIF-style) container |
| Compression | Lossy or lossless; usually smaller than JPEG at equal quality |
| Bit depth | 8, 10, or 12-bit; supports transparency and wide colour |
| Browser support | ~93% of users — Chrome 85+, Firefox 93+, Safari 16.4+, Edge 121+ |
| Best for | Web-ready previews and compact archives of static artwork |
.pub file onto the page or click "+ Add Files" to browse. You can queue several Publisher files at once.Converting .pub to AVIF rasterizes your publication: each page is rendered to a flat image, so the text and layout are no longer selectable or editable — you get a picture of the page, not a document. That is fine for a web preview or a visual archive, but it is the wrong tool if you need to read, search, reflow, or reprint the content.
For keeping your publications usable after Publisher's October 1, 2026 retirement, Microsoft recommends saving to PDF for viewing (and Word for editing), not an image format. A PDF preserves the page layout as a portable document with selectable text and opens on any device — which is what most people searching for a .pub converter actually need. Use Publisher to PDF for that. If you only want a flat raster of each page but need broader compatibility than AVIF, Publisher to JPG and Publisher to PNG open everywhere, including older browsers and image editors.
Microsoft has confirmed that the perpetual version of Publisher loses support on October 1, 2026, and Microsoft 365 subscribers will no longer be able to install or open Publisher at all. Because .pub is proprietary and few other tools read it reliably, getting your content out while a tool can still open the file is genuinely time-sensitive. AVIF is a good fit when you want a compact web image of each page; for an openable, shareable document, Publisher to PDF is the rescue path Microsoft itself recommends.
No. The conversion renders each page to a raster image, so the text becomes pixels — you cannot click into it, search it, or restyle it afterward. If you need the words back as editable text, convert to a document format first (Publisher to PDF) and, if necessary, export that PDF to Word. AVIF is for the visual result, not the underlying content.
AVIF is a single-image format, so a multi-page .pub is rendered to one AVIF per page rather than a single multi-page file. If you need every page bundled together as one document, convert to PDF instead with Publisher to PDF, which keeps all pages in one file.
.pub is Microsoft's proprietary format, so non-Microsoft renderers cannot reproduce it perfectly. In our testing, simple single-page flyers and certificates render cleanly, while documents with unusual fonts, heavy layering, or externally linked images are more likely to shift or substitute elements — fonts that are not embedded in the .pub get the closest available match. Spot-check complex publications, and for a print-exact result export from Publisher itself while you still can.
AVIF is supported by browsers covering roughly 93% of users, including Chrome 85+, Firefox 93+, Safari 16.4+ (2023), and Edge 121+. Older browsers and some image viewers cannot display it, so if you need a picture that opens absolutely everywhere — including legacy software — choose Publisher to JPG or Publisher to PNG instead.
The "Conversion Quality" setting controls the render resolution: 300 DPI (the default) is sharp enough for print-quality detail, while 96 or 150 DPI produces smaller files for on-screen use. Raise it before converting rather than enlarging the finished AVIF — each image has a fixed pixel count, so stretching it afterward only blurs existing pixels.
Files are uploaded over an encrypted connection, processed on our servers, and deleted automatically a few hours after conversion — no sign-up, no watermark, never shared or made public. For very large publications, the practical limit is upload time rather than the page count itself.