Does my image get uploaded?

No. The conversion runs inside your browser on your own device — the image never leaves your computer and never reaches a server.

Which formats can I convert between?

JPG, PNG, WebP, and AVIF, in any direction. The tool reads the file's real format from its bytes — not its extension — and offers the other three as targets.

How is the output quality chosen?

For JPG, WebP, and AVIF you pick a named level, and the encoder searches for the smallest file that clears that level's measured perceptual floor — the actual measured score is shown with the result, not a guess. PNG output is different: it is lossless, every pixel identical to the decoded input.

What happens to transparency when I convert to JPG?

JPG has no transparency, so transparent areas are blended onto a white background — and the result tells you this happened. Converting to PNG or WebP keeps transparency intact.

Can I convert a JPG to a JPG to make it smaller?

This tool changes formats, so it declines same-format conversions instead of silently re-encoding your file — use Compress Image for that job, which is built exactly for it.

AVIF is the newest widely supported web format and often produces small files at high quality on graphics and screenshots. Whether it beats JPG or WebP depends on the image — which is why the measured quality score and the real byte sizes are shown for every conversion, so you can judge with numbers, not promises.

image

Convert Image

Convert an image between JPG, PNG, WebP, and AVIF without uploading it anywhere — the conversion runs in your browser. Lossy output is tuned against a measured quality score that is shown with the result; PNG output is pixel-lossless. No account, no email.

Frequently asked questions

Does my image get uploaded?: No. The conversion runs inside your browser on your own device — the image never leaves your computer and never reaches a server.
Which formats can I convert between?: JPG, PNG, WebP, and AVIF, in any direction. The tool reads the file's real format from its bytes — not its extension — and offers the other three as targets.
How is the output quality chosen?: For JPG, WebP, and AVIF you pick a named level, and the encoder searches for the smallest file that clears that level's measured perceptual floor — the actual measured score is shown with the result, not a guess. PNG output is different: it is lossless, every pixel identical to the decoded input.
What happens to transparency when I convert to JPG?: JPG has no transparency, so transparent areas are blended onto a white background — and the result tells you this happened. Converting to PNG or WebP keeps transparency intact.
Can I convert a JPG to a JPG to make it smaller?: This tool changes formats, so it declines same-format conversions instead of silently re-encoding your file — use Compress Image for that job, which is built exactly for it.
Why AVIF?: AVIF is the newest widely supported web format and often produces small files at high quality on graphics and screenshots. Whether it beats JPG or WebP depends on the image — which is why the measured quality score and the real byte sizes are shown for every conversion, so you can judge with numbers, not promises.

Frequently asked questions

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