Why your PDF looks blurry in Gmail

Gmail rarely shows you the PDF. It builds its own preview from a re-rendered copy, sized for speed on a phone connection, and the re-render is what the client swipes through. Text survives this reasonably well. Photography does not: image-heavy spreads come back softer, and fine typography — the hairline rules, the 8-point captions a studio actually set — comes back muddied.

Apple Mail and Outlook add their own layer, and each behaves differently, so the same file previews three ways in three clients. Worse, you cannot see it happen. The sender sees their file; only the recipient sees the flattening. Studios discover this when a client asks why the work looks “compressed”.

Downloading the attachment and opening it in a real PDF reader still shows the true file. Everything before that tap is the mail app’s approximation of your work.

works offline

An attachment opens on a plane and in a basement. A link needs a connection.

lives in the thread

Search the client’s inbox for your file name and it is there. A link is one more tab.

no flattening

A link opens the real file in a browser, not a mail app’s re-render of it.

the first tap

An attachment asks for a download. A link shows the cover straight away.

on a phone

Most previews are read on a phone now, which is where the flattening is worst.

expiry

An attachment sits in the inbox forever, which is a feature and a leak. A permanent link does both better: always there, replace the file behind it any time.

For a one-page spec sheet or a signed contract, keep the attachment. For anything set as a spread — a portfolio, a pitch, a lookbook, an annual report — the preview is the first impression, and the preview is the thing going wrong.

The link that never expires is the fix for expiry; the reader is the fix for the preview.

Upload the PDF once and the first page becomes the preview — the actual cover, at its own proportions, in the email itself. The client taps it and the book opens full-bleed in the browser: no toolbar, no page-turn effect, no logo but yours. The file is never re-rendered by a mail app, because the mail app never touches it.

If the client prefers to keep a copy, they can print to PDF from the reader or you can send the attachment as a second, deliberate step — with the link first, so the work is seen properly before it is filed.

mybook is built and run end to end by AI agents on NanoCorp, which is why a one-upload product can stay this small. The proof is free and carries one discreet line under the last spread; €29 once removes it.