Best tools
Best Free Online Image Converters
Last updated · Reviewed by Daniel Agrici
The best free online image converters change formats — PNG, JPG, WebP, BMP, and animated GIF — entirely in the browser with no uploads. Convert to WebP for the web and to PNG/JPG for maximum compatibility.
Need a different image format? These converters handle every common direction between PNG, JPG, WebP, BMP, and GIF. They run locally in your browser, so conversion is instant and your files stay private.
The tools
PNG to WebP
Convert PNG images to WebP format for 26% smaller file sizes.
WebP to PNG
Convert WebP images back to PNG format for universal compatibility.
JPG to WebP
Convert JPEG images to WebP for 25-34% smaller file sizes.
WebP to JPG
Convert WebP images to JPEG for maximum compatibility.
JPG to PNG
Convert JPEG images to lossless PNG format with transparency support.
PNG to JPG
Convert PNG images to JPEG format for smaller file sizes.
BMP to PNG
Convert BMP images to compressed PNG format.
BMP to JPG
Convert BMP images to JPEG for dramatically smaller files.
GIF to WebP
Convert GIF frames to WebP for smaller animated image files.
Quick comparison
| Tool | What it does | Open |
|---|---|---|
| PNG to WebP | WebP typically reduces PNG file sizes by 25–35% with no visible quality loss. Conversion runs entirely in your browser via the Canvas API — no files are uploaded to any server. | Open → |
| WebP to PNG | Converting WebP to PNG is lossless — PNG stores every pixel exactly as-is from the WebP source. Use this when you need to edit the image in software that doesn't support WebP, or when distributing images outside the browser. | Open → |
| JPG to WebP | WebP is typically 25–34% smaller than JPEG at the same visual quality. Converting your JPG images to WebP is the quickest way to improve page load speed and Core Web Vitals scores without changing image dimensions. | Open → |
| WebP to JPG | WebP to JPG conversion is useful when sharing images with tools or clients that don't support WebP — such as older Outlook versions, certain CMS platforms, or legacy print workflows. The JPEG will be slightly larger but universally compatible. | Open → |
| JPG to PNG | Converting JPG to PNG does not improve image quality — PNG is lossless, but cannot recover detail already lost in the JPEG compression. Use it when you need a format that supports transparency or when a tool requires PNG input. | Open → |
| PNG to JPG | PNG to JPG conversion reduces file size by 60–80% for photographs because JPEG uses lossy compression optimised for photos. The trade-off: JPEG does not support transparency, so transparent areas are filled with a white (or custom) background. | Open → |
| BMP to PNG | BMP is an uncompressed format that stores every pixel as raw data — a 1920×1080 screenshot can be over 6MB as BMP. Converting to PNG applies lossless compression and typically reduces file size by 60–90% with no quality loss. | Open → |
| BMP to JPG | BMP files are uncompressed — a 1920×1080 image takes roughly 6MB as BMP. Converting to JPEG at 85% quality reduces it to about 300–500KB (90–95% smaller) with minimal visible quality loss, making it practical to share and upload. | Open → |
| GIF to WebP | WebP is typically 26–34% smaller than GIF while supporting full 24-bit color (GIF is limited to 256 colors) and alpha transparency. Converting GIF frames to WebP improves image quality and reduces bandwidth on modern browsers. | Open → |
Best for
Shipping images to the web
PNG to WebPWebP gives the best size-to-quality ratio with universal browser support.
Frequently asked questions
What's the best image format for a website?
WebP is the best default for web images — it's 25–35% smaller than PNG/JPG at equivalent quality and works in all modern browsers. Keep PNG for graphics needing lossless transparency and JPG only where WebP isn't accepted.
Is converting GIF to WebP worth it?
Yes. Animated WebP is typically 50–90% smaller than the same GIF while supporting more colors and smoother motion, so it's a large, safe win for animated content.
Do I lose quality when converting between formats?
Converting to a lossless format (e.g. WebP lossless or PNG) preserves quality exactly. Converting to a lossy format re-encodes the image, so pick a quality of around 80 to keep the result visually identical while saving space.