How the caption is drawn on the picture
White text, black outline, uppercase
Caption text is drawn in bold, filled white, with a black stroke, and the export uppercases the words. That is the classic caption look, and it is applied when you download, so the preview and the file agree. The default font is Impact. You can switch to Arial Black, Helvetica, Comic Sans, Courier, Times, Verdana, Trebuchet, or Georgia. The text box starts around 80 percent of the canvas width, so a short joke sits in one block and a longer line wraps inside that width.
Six emoji stickers, and nothing stamped on top
The sticker set is glasses, laugh, ROFL, fire, 100, and cool. They are emoji you place like captions, not a separate illustration library. No logo is stamped on the pixels. The JPEG is the picture plus the words and emoji you put there, exported at quality 0.92. Upload is limited to JPG, PNG, and WebP. Templates come from Imgflip, with pinned fallbacks if that request comes back empty.
A still JPG from a canvas in this tab
Editing and the download use a canvas on your device. Template files are requested so the layout can appear, and the caption you type is drawn locally. The export is a JPG, at quality 0.92, at the picture’s pixel size. It is a still. If the joke needs motion, the GIF maker is the page that encodes frames. Keep the upload if it was a PNG you might want again, because the download is a lossy JPEG.