Convert PUB to APNG Online

PUB to APNG Converter

A .pub file is a Microsoft Publisher document — a page-layout file for newsletters, flyers, and brochures, not a normal image. This tool renders each page of that document into a frame and assembles them into a single animated PNG (APNG), so a multi-page Publisher file plays back as a page-flip animation in any browser. It's a way to view, preview, or embed a .pub layout without owning Publisher — which matters now that Microsoft has set an end-of-support date of October 1, 2026 for the app.

How PUB to APNG Rendering Works

.pub is a page-layout format, so there is no "image" to copy — the converter has to render each Publisher page to a raster frame first, exactly like printing the page to an image. The render Resolution (DPI) control sets how sharp that raster is, and each rendered page becomes one frame of the APNG. A single-page .pub therefore produces a one-frame (static) APNG; a multi-page .pub produces an animation that flips through the pages at the framerate you choose. Fonts, colors, and layout are baked into the pixels, so the result is a faithful picture of the page, not an editable document.

PUB Format at a Glance

APNG Format at a Glance

How to Convert PUB to APNG

1. Upload Your PUB File: Drag and drop your .pub file or click "Upload." A multi-page document becomes a multi-frame animation; a single page becomes a one-frame APNG.
2. Set the Render Resolution (DPI): Pick a DPI preset — 150 DPI (Balanced) for on-screen previews, 300 DPI (Print Recommended) for crisp text. Higher DPI means sharper frames and a larger file.
3. Adjust Framerate, Image Quality, or Colors: Choose a Framerate (10 FPS is the default; 1 FPS gives a slideshow-style page flip), set Image Quality (%) or a Preset Resolution to control size, or apply Colors (By Color Reduction + Dither) to shrink the palette.
4. Convert and Download: Click "Convert" and download your APNG. No sign-up, no watermark.

Frequently Asked Questions

Does this edit the Publisher file or just render a picture of it?

It renders a picture. The output is an APNG — a flat raster image of how each page looks, with fonts and layout baked into the pixels. You can't re-edit the text or move objects afterward. If you need an editable result, convert to PDF instead and open that in a PDF or word-processing tool. APNG is the right pick when you want a self-contained, browser-playable preview of the layout.

What happens if my .pub file has more than one page?

Each page becomes one frame, in document order, and they play back at the framerate you set. A 4-page brochure at 1 FPS plays as a four-second page flip; the same file at 10 FPS cycles in under half a second. If you only want a single page as a still image, use PUB to PNG, which renders one page losslessly without animating.

Which DPI should I choose?

Match it to where the image will live. For an on-screen preview, 150 DPI (Balanced) keeps text readable while holding the file size down. For fine print detail or zoomable output, 300 DPI (Print Recommended) is sharper but larger. Going above that mainly grows the file without visible benefit on a typical display, since browsers render the APNG at screen resolution anyway.

Why APNG instead of an animated GIF?

Color and transparency. APNG carries full 24-bit color (16.7 million shades) and 8-bit alpha, so the gradients, photos, and soft edges common in Publisher layouts stay clean. A GIF is capped at 256 colors per frame with on/off transparency, which forces dithering and a hard fringe around anti-aliased text. Since the PNG Third Edition became a W3C Recommendation on June 24, 2025, APNG is an official part of the PNG standard rather than an unofficial extension.

Will the APNG display everywhere?

In about 94.7% of browsers, per current caniuse data — Chrome 59+, Firefox 3+, Safari 8+, Edge 79+, and Opera 46+ all play APNG natively. The small share that don't (mainly Internet Explorer) fall back gracefully: APNG stores its first frame as a standard PNG, so those viewers show a static image of page one instead of breaking.

Is converting my .pub files now actually necessary?

It's worth doing before Microsoft Publisher's support ends on October 1, 2026. After that date, Microsoft 365 subscribers lose access to the app entirely, and perpetual-license copies keep running only as unsupported software. Microsoft's own guidance is to convert existing .pub files to another format beforehand. APNG is a good choice when you want a visual, browser-ready snapshot of a layout; PUB to PDF is better when you need a print-faithful, searchable document. In our testing, a 3-page A4 Publisher flyer rendered at 150 DPI and 10 FPS produced a roughly 700 KB APNG that played smoothly in Chrome and Firefox.

How do I make the output file smaller?

Lower the render Resolution (DPI), scale frames down with a Preset Resolution, drop Image Quality (%), or reduce the palette with Colors (By Color Reduction + Dither). Because APNG is lossless by default, the biggest lever is usually DPI — dropping from 300 to 150 roughly quarters the pixel count. For a final squeeze, run the result through the Image Compressor.

What happens to my file after converting?

Your .pub file is uploaded over an encrypted (TLS) connection and rendered on our servers, then deleted automatically after a few hours. There's no sign-up, no watermark, and files are never shared or made public.