Free Image Format Converters — PNG, JPG, WebP, BMP, and GIF Compared

Not every image format is interchangeable — the right choice depends on whether you need transparency, small file size, or broad compatibility, and picking wrong can mean a bloated page or a broken graphic.

PNG — for transparency and sharp edges

PNG supports true transparency and lossless compression, which makes it the right choice for logos, icons, screenshots, and anything with sharp edges or text. The tradeoff is file size — PNG files are typically much larger than a JPG of the same photo.

JPG — for photos

JPG uses lossy compression tuned for photographic detail, producing much smaller files than PNG for photos at a quality loss that's usually invisible at normal viewing sizes. It has no transparency support, which makes it a poor choice for logos or graphics with flat colors and hard edges.

WebP — smaller, with tradeoffs

WebP typically produces smaller files than both PNG and JPG at comparable quality, and supports transparency like PNG. Browser support is now broad, but it's still worth converting to PNG or JPG for compatibility with older tools, email clients, or software that doesn't handle WebP.

BMP and GIF — legacy formats with specific uses

BMP is an uncompressed format still required by some older desktop software and print workflows. GIF supports simple animation and is still occasionally required for compatibility with older systems, though it's largely been replaced by more efficient formats for anything beyond short animated loops.

Converting between formats

The Image Format Converter converts an image between PNG, JPG, WebP, BMP, and GIF directly in the browser — useful when a platform rejects an upload because of its format, or when you need a smaller WebP version of a PNG for a faster-loading web page.

Resizing at the same time

File format is only half the problem — dimensions matter just as much for page load speed and upload limits. The Image Resizer resizes an image to exact pixel dimensions or by percentage, with an aspect-ratio lock to avoid accidentally distorting the image.

Common scenarios

1. Converting a PNG screenshot to WebP to shrink a web page's total load size.
2. Converting a WebP image to PNG or JPG because an older tool or platform doesn't accept WebP uploads.
3. Resizing a large photo down to the exact dimensions a form or CMS requires before uploading.
4. Converting an image to BMP for a legacy application that only accepts that format.

A quick way to decide

If the image needs a transparent background — a logo over a colored section, an icon on any background — PNG or WebP are the only real options; JPG and BMP will fill transparent areas with a solid color instead. If it's a photograph with no transparency requirement, JPG or WebP will produce a noticeably smaller file than PNG at a visual quality most viewers won't be able to tell apart from the original.

Processed locally

Both tools use the browser's Canvas API to convert and resize images — your photos are never uploaded to a server during the process.

Try them

Convert formats with the Image Format Converter, and resize images to fit any requirement with the Image Resizer.