Pick the format the next step accepts
The format is the whole problem. An iPhone saves HEIC. A website often stores WEBP. A government form still wants a JPG under 50 KB or 100 KB, at a size it publishes in the instructions. Converting does not improve a bad photo. It only makes the file acceptable.
JPG and JPEG are the same format. PNG keeps transparency and gets large. WEBP is a sensible web format in 2026 because current browsers display it, and a poor choice for a printer that has never heard of it. AVIF is similar: great in a browser, awkward in older software.
Resize before you compress if the portal publishes pixel dimensions. Stretching a tiny image to HD only makes a larger blur.
If you already know the job, start with JPG to PNG or PNG to JPG.
Every format on the site is listed from the homepage.
A new extension is not a better photo
Open the tool that names your two formats and read what the download will contain before you delete the original. If a result does not match that description, tell us.
Format, pixels, and kilobytes are three jobs
An iPhone saves HEIC. A website often wants WEBP. A printer or a government form still wants JPG. Converting among those does not improve a soft photo. It only changes what the next program will accept. JPG, WEBP, and AVIF are lossy. Convert once from the best original. PNG is for logos, screenshots, and transparency. A photo as PNG is mostly just a larger file.
If a portal prints a pixel size and a kilobyte cap, resize first, then compress from that cropped original. The 20 KB and 50 KB tools are for face photos that were already simple. A busy scene will look harsh before it hits the cap. The general image-to-KB tool aims under about 1 MB, which is the wrong target for a 50 KB form. HD and upscale tools enlarge pixels. They do not reconstruct a face the camera missed.
HEIC cannot be written in the browser. SVG exported to PNG becomes a fixed-size picture. GIF has 256 colors and will blotch a photograph. Nothing on this page is uploaded. Keep the camera file until the form accepts the copy.
Keep one untouched original with a clear name, and make every experiment from a copy. If the form rejects the file, do not compress the rejected file again. Go back to the original, crop to the published pixel size, and compress once toward the published kilobyte cap. HEIC, WEBP, and AVIF are fine on modern phones and awkward in old forms. JPG is the file those forms still mean when they say "image."