Marblism Sonny Logo Setup: Check Your PNG First

Make the logo step predictable before Sonny puts the file on every generated social post. This local checker verifies the file is really a PNG, detects transparency and previews it on light and dark backgrounds.

A logo that looks fine on a white office document can turn into a white box, disappear on a dark image or become unreadable once it is reduced. If that file is attached automatically to every post, one weak asset becomes a repeated problem. A five-minute file check is cheaper than fixing a week of scheduled graphics.

This guide focuses only on the reusable logo asset. Use the social-account mapper to keep brands in the right workspace and the Sonny approval workflow to check facts, offers and customer-safe media before publishing.

What Marblism officially supports

Marblism's current instructions say Sonny can automatically include a brand logo in every AI-generated post. The documented path is Sonny → Settings → “Always include my logo.” Marblism recommends PNG format, ideally with a transparent background, and also tells owners to enable “Improved post generation” in the Post Engine section.

Marblism says Sonny places the uploaded logo automatically for the best fit. Its public logo article does not publish a required pixel size, safe-area rule or exact placement control, so the finished test post—not this checker—must decide whether the mark is readable.

Free Sonny logo PNG checker

Select the exact logo file you plan to upload. The checker reads its PNG signature, pixel dimensions and alpha transparency, then shows the same file on light and dark backgrounds.

Choose a logo file

Clear logo

Choose a PNG to run the local check.

Light background

Dark background

Privacy: the file stays in your browser. It is not uploaded to SkipTheHire or Marblism by this checker. Do not select a file containing private customer information.

Prepare your Marblism Sonny logo step by step

1. Start with the real brand mark. Use the current approved logo, not a screenshot, social avatar or old version from a vendor email.
2. Export a PNG with transparency. Marblism recommends PNG and says a transparent background is ideal. Keep the original design file elsewhere; upload an exported copy.
3. Run the local check. Confirm the file has a valid PNG signature and that transparent pixels are detected. Look at both previews. The name or symbol should remain visible without a white rectangle around it.
4. Open Sonny's settings. In Marblism, click Sonny, select Settings and scroll to “Always include my logo.” Turn it on and upload the checked PNG.
5. Enable the documented Post Engine setting. Turn on “Improved post generation,” as Marblism's logo instructions specify.
6. Generate one low-risk draft. Ask Sonny for one image post using approved business facts and media. Tell Sonny to leave it unscheduled and unpublished.
7. Inspect the actual placement. Check that the logo is present, readable, not covering important content and acceptable on the generated background. Replace the file and repeat if it fails.
8. Then use your normal approval process. A clean logo does not validate the caption, offer, photo permission or business claim.

Why this small check matters

• It catches a renamed JPEG or screenshot before Marblism becomes the test environment.
• It exposes a solid background that may look like an unwanted box on generated artwork.
• It lets an employee compare one approved asset on two common background conditions.
• It keeps logo setup separate from the decision to publish a caption or customer image.

Once the logo works, note which file was approved in your Sonny operating guide. If you manage more than one brand, keep a separate approved logo inside each brand's workspace plan.