Can it convert iPhone HEIC photos to JPG?

Only in Safari. Chrome, Firefox and Edge cannot decode HEIC at all, and since every image here is decoded by your own browser there is nothing on our side that can change that. Set the iPhone camera to Most Compatible so it writes JPG, or export as JPG from the Photos app.

Will converting a JPG to PNG make it sharper?

No. PNG stores exactly the pixels it is given, and the detail JPEG discarded when the photo was first saved is gone for good. You get a lossless copy of a lossy picture, usually several times the file size, with no visible improvement at all.

Should I upload WEBP to a marketplace?

Check before you do a large batch. WEBP is the smallest of the three at a given quality, but the accepted formats differ by marketplace and by upload route, and a rejected file costs more time than the smaller size saved. JPG is the one accepted everywhere.

What about AVIF, TIFF, SVG or PDF?

Not offered. Output is JPG, PNG or WEBP only, because those are the three a browser can be relied on to write. If what you actually need is the images gathered into a PDF, the images-to-PDF tool does that job instead.

Does converting to JPG make the file smaller?

Usually, and by a lot, when the source is a PNG photograph. It can go the other way: a flat graphic with few colours, such as a size chart, is often smaller as a PNG, and turning it into a JPG both grows the file and blurs the lettering.

Convert product images between JPG, PNG and WEBP

The format argument turns up at the upload screen. A designer sends PNGs and the catalogue sheet wants JPG. A brand logo arrives as a transparent PNG and dropping it into a listing image turns the transparency black. WEBP is the smallest of the three and some upload routes take it while others refuse it.

This converts a whole folder in one pass, and it handles the part that usually goes wrong: JPEG cannot store transparency, so transparent pixels are filled with a colour you choose - white by default - rather than being written out as black.

Convert images Needs an account. The trial is free and takes a WhatsApp code.

How it works

Add the images. JPG, PNG and WEBP can all be read, and so can GIF and BMP where your browser supports them. Anything that is not an image is skipped with a note.
Choose the new format. JPG for photographs and for anywhere that wants the safest option. PNG when transparency or a lossless copy matters. WEBP when the receiving end accepts it and the file size matters more than compatibility.
Set the background for transparent areas. The colour picker starts on white. It only comes into play when the source has transparency and the target is JPG, which is the case that otherwise gives you black corners.
Pick a quality. Best, High, Medium or Small file. High is the default and is where most product photos should sit. The control disappears when PNG is selected, because PNG is lossless and has no quality to set.
Export. Names are kept with the new extension, and a batch comes back as a ZIP called converted-images.

What it handles

JPG, PNG and WEBP in any direction, across a whole folder in one run
Transparent pixels filled with a colour you choose rather than coming out black in a JPG
Four quality settings for JPG and WEBP; the control is hidden for PNG because PNG is lossless
Your browser is tested for each output format before it is used - a canvas quietly returns a PNG for a format it cannot write, and shipping you mislabelled files would be worse than not offering it
GIF and BMP files can usually be read and come out as one of the three writable formats
File names are kept, with only the extension changed

Your files stay on your computer

This runs inside your browser tab. The file is read and written on your own device and is never uploaded — not the order PDF, not the customer names and addresses printed on it. There is no upload endpoint to send it to.

Questions

Can it convert iPhone HEIC photos to JPG?: Only in Safari. Chrome, Firefox and Edge cannot decode HEIC at all, and since every image here is decoded by your own browser there is nothing on our side that can change that. Set the iPhone camera to Most Compatible so it writes JPG, or export as JPG from the Photos app.
Will converting a JPG to PNG make it sharper?: No. PNG stores exactly the pixels it is given, and the detail JPEG discarded when the photo was first saved is gone for good. You get a lossless copy of a lossy picture, usually several times the file size, with no visible improvement at all.
Should I upload WEBP to a marketplace?: Check before you do a large batch. WEBP is the smallest of the three at a given quality, but the accepted formats differ by marketplace and by upload route, and a rejected file costs more time than the smaller size saved. JPG is the one accepted everywhere.
What about AVIF, TIFF, SVG or PDF?: Not offered. Output is JPG, PNG or WEBP only, because those are the three a browser can be relied on to write. If what you actually need is the images gathered into a PDF, the images-to-PDF tool does that job instead.
Does converting to JPG make the file smaller?: Usually, and by a lot, when the source is a PNG photograph. It can go the other way: a flat graphic with few colours, such as a size chart, is often smaller as a PNG, and turning it into a JPG both grows the file and blurs the lettering.

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Convert images