.jpeg and .jpg are the same image format — this tool re-encodes your file and saves it with the standard .jpg extension, which some upload forms and tools expect.
Nothing is uploaded.
JPEG and JPG are identical formats — the extension difference is historical (older Windows systems required 3-letter extensions).
Your image is drawn to a canvas and re-exported as a fresh, standard .jpg file.
Get a file that any tool expecting ".jpg" will accept without complaint.
There's a small amount of re-encoding involved, similar to opening and re-saving a JPEG, but at high quality settings the difference is not visible.
Some upload forms check file extensions literally rather than checking the actual file format, so a strict check for ".jpg" will reject ".jpeg" even though they're the same format underneath.
Functionally similar, but this tool re-encodes the image data itself rather than just changing the filename, which avoids potential compatibility issues some strict validators check for.
No, this tool works with existing JPEG/JPG files. HEIC photos need to be exported as JPEG first, which most photo apps can do directly.