Image Format Converter Online - Free PNG/JPEG/WebP Converter

Features

PNG ↔ JPEG ↔ WebP ↔ BMP

Quality control

Drag & drop upload

Size comparison

Download result

How to Use

1. Drop an image into the upload zone, or click to choose a file.

2. Pick the target format (PNG, JPEG, WebP, BMP).

3. Adjust quality if needed.

4. Click Convert, then Download the result.

About this tool

Different places want different image formats: a website prefers WebP, an older system insists on JPEG, a design tool wants PNG. This converter decodes your image in the browser and saves it again in the format you choose, with a quality slider for the lossy formats and a before-and-after size comparison. Converting between formats changes the container and compression, not the resolution, so the pixel dimensions stay the same. Transparent areas are filled with white when the target format cannot store transparency. Because everything happens locally, the tool works offline once the page has loaded and is safe for private images. Keep an original copy, since converting a lossy file again loses a little more quality each time.

Frequently Asked Questions

Does converting to PNG improve the quality of a JPEG?

No. The detail discarded when the JPEG was created cannot be recovered. Saving it as PNG only keeps the current appearance without further loss, usually with a much larger file.

Which formats keep transparency?

PNG and WebP keep transparency. JPEG does not, so transparent areas are filled with white during conversion.

Is WebP supported everywhere?

All current versions of Chrome, Edge, Firefox and Safari display WebP. Some older software, email clients and print services still expect JPEG or PNG, so keep a JPEG copy for those.

Why is BMP output sometimes saved as PNG data?

The conversion uses the browser's built-in image encoders. Most browsers can encode PNG, JPEG and WebP, but not BMP, and some fall back to PNG. If you strictly need a BMP file, verify the result in an image editor.

Can I convert HEIC photos from an iPhone?

Only if your browser can open HEIC images, which most desktop browsers cannot. Export the photo as JPEG from the Photos app, or set the iPhone camera to "Most Compatible", then convert it here.