High-Quality A4 Image Resizing

I have a batch of PNG images that must be converted to exact A4 dimensions (210 × 297 mm) without sacrificing clarity or altering their original proportions. Every file needs to emerge sharp, artifact-free, and set to 300 dpi so I can send them straight to a printer. You’ll handle the scaling in Photoshop, Affinity Photo, or any comparable tool that keeps colour fidelity intact. No additional edits are required—this is a pure resize job—so consistency and precision are what matter most. A quick but careful turnaround is important to me; once I share the download link I’d like the finished set returned promptly, clearly named, and ready for press. Deliverables • Resized A4 PNGs, 300 dpi, print-ready • Optional layered source files (PSD or equivalent) for future tweaks • One sample file first so we can confirm dimensions and quality before you process the remaining images Let me know how soon you can start and an estimated completion time for the full batch.