Image Converter: JPG, PNG and WebP Both Ways (Free, In-Browser)
Every format argument comes down to three questions: does it need transparency, will it be edited again, and who has to open it. JPG is the universal photograph format, PNG keeps crisp edges and transparent backgrounds, WebP beats both on size for the web.
The Image Converter switches between all three locally, in batch, without the upload-and-wait routine of conversion websites.
Choosing the right destination
Photographs and scans: JPG or WebP. WebP typically lands 25 to 35 percent smaller at the same visible quality, and every current browser and phone reads it.
Logos, screenshots, diagrams, anything with text or transparency: PNG. It stores edges losslessly, so a red logo on a transparent background survives untouched.
Old portals and print shops that only accept JPG: convert to JPG and keep quality high; the re-encode cost on flat graphics is small if you do it once.
Step by step
- Open Image Converter and add one or many files; previews render locally.
- Pick the output format and, where offered, the quality step.
- Convert; each file reports its new size next to the old one.
- Download individually or as a batch; nothing is stored on any server.
Transparency and quality notes
- Converting PNG with transparency to JPG fills the transparent area, usually with white; check the preview before downloading.
JPG to PNG never restores lost detail; it only stops further loss, which is still worth doing before editing.
Repeated JPG re-encoding stacks artefacts; always convert from the original when you can.
WebP output with transparency is fully supported and is the best website choice today.
Why convert in the browser
Conversion sites make you upload family photos and product shots to process them for two seconds. Here the same work happens in your tab using canvas encoding, so the file never leaves the device and the batch finishes at local speed, not queue speed.
Pair it with the Image Compressor when the destination also has a size rule: convert to the right format first, then hit the byte target.
Try it free: Image Converter | runs entirely in your browser, no uploads and no signup.