Boost DPI for Poster

I have a single PNG that was saved at just 98 dpi, yet I need to blow it up for a large-format poster. I’m looking for someone who can professionally resample the file to a minimum of 240 dpi—300 dpi or higher is even better—while preserving the original pixel dimensions and color fidelity. A light, tasteful sharpening pass is the only enhancement I want; no color correction or noise reduction is required.

You’re free to use Photoshop, Affinity, Topaz Gigapixel AI, or any other pro-level tool that will keep edges crisp and avoid visible artefacts when the poster is printed.

Deliverable
• High-resolution PNG (and optionally a print-ready TIFF) at 240–300 dpi or higher, identical physical size to the source image.

I’ll review the file at 100 % and 200 % zoom to confirm that lines stay clean and the sharpening looks natural before signing off.