You can find Snapchat-style time filter PNGs (transparent overlays) on free image sites like PNGkey, Clipground, or PNG Gallery—they offer white time‑stamp designs you can download in 1080×1920 or other sizes. Once you grab a PNG, just open it alongside your photo in any image editor (Photoshop, GIMP, Canva), layer the time‑stamp on top, align it at the top corner, and export a combined image—no in‑app Snapchat tweak needed!