Image Format Converter
Before
After
Convert your images between the three most popular formats — PNG, JPEG and WebP — in one click, with quality control for the lossy formats. The tool runs entirely in your browser, so your images are never uploaded to any server and stay private.
How to use
- Pick an image from your device to see its preview right away with a badge of its current format, dimensions and size.
- Choose the target format: PNG, JPEG or WebP, and set the quality for lossy formats.
- Press Convert to see the before/after images side by side with both formats and a size comparison.
- Press Download to save the image in its new format.
Frequently asked questions
What happens to transparency when converting to JPG?
JPG does not support transparency at all, so the tool fills transparent areas with a white background when converting from PNG or WebP. To keep transparency, choose PNG or WebP as the output format.
Are my images uploaded anywhere during conversion?
No. Conversion happens locally in your browser using built-in web APIs — the image never leaves your device at any step.
Why did the file get bigger after converting to PNG?
PNG is a lossless format that keeps every detail, so it usually produces larger files, especially for photos. If size is your priority, pick WebP or JPEG instead.
Which format is best for websites?
WebP is usually the best choice: small files at high quality with full transparency support, and it works in every modern browser.