MergePNG - Merge PNG Files Online Free

MergePNG - Merge PNG Files Online Free is an image editing tool. A free, browser-only tool that merges PNG, JPG and WebP images into a single image or PDF using layout templates, with no uploads, no sign-up, and preserved transparency.

MergePNG is a browser-based tool for combining multiple PNG, JPG and WebP images into a single composite image or a PDF. Rather than uploading files to a remote server, it decodes, arranges and re-encodes every image locally using the browser's Canvas API, so the files never leave the device they are opened on. Users drag images into the tool, reorder thumbnails, pick a layout preset such as a vertical stack, a grid, or a compound arrangement like 1+2, and export the result as PNG, JPG, WebP or a multi-page PDF. The tool targets anyone who regularly needs to stitch together screenshots, product shots, scanned pages or sprite sheets without installing desktop software or trusting a cloud upload service. That includes designers assembling quick contact sheets, support teams combining screenshots into one reference image, and anyone preparing a batch of images for a printed document or email attachment. Because no account or payment is required, it also suits one-off tasks where setting up a full image editor would be overkill. In practice, the workflow is linear: add files of mixed formats to one list, fix orientation with rotate and flip controls, apply spacing, margins, borders and rounded corners, then choose an output format at the very end. PNG transparency is preserved through the whole process provided the background setting stays transparent and the export format supports alpha. A SHA-256 duplicate check flags identical files before merging, and the tool actively manages the canvas size limits that mobile Safari imposes, scaling output down with a notice rather than failing. Compared with server-based mergers or full image editors like Photoshop or GIMP, MergePNG trades advanced editing depth for speed, privacy and zero setup. It sits closer to single-purpose online utilities than to a general photo editor, competing with other browser-based mergers and PDF combiners rather than with layered design software.