Which format should I choose?

WebP for the web: it handles photographs and transparency, and is 25–35% smaller than the equivalent JPEG or PNG. JPEG for photographs where compatibility matters most. PNG for screenshots, logos, and anything with sharp edges or transparency.

Does converting a JPEG to PNG improve it?

No. PNG stores exactly the pixels it is given, including every compression artefact the JPEG already has. The file gets larger and the picture stays the same — going from lossy to lossless never undoes the loss.

What happens to transparency in a JPEG?

JPEG has no alpha channel, so transparent areas must be filled with a solid colour. The tool detects transparency, warns you, and lets you choose that colour rather than defaulting to black.

Can it convert to AVIF?

No. Browsers can display AVIF but cannot reliably encode it from a canvas, so offering it would produce a file that is secretly a PNG. Only formats the browser can genuinely write are listed.

Image Converter

Convert an image from one format to another without uploading it. PNG, JPEG, WebP, GIF, BMP, and SVG go in; PNG, JPEG, or WebP comes out. When a source with transparency is saved as JPEG the tool says so and lets you pick the colour it gets flattened onto, rather than quietly producing black edges.

Image Tools

Choose an image to convertPNG, JPEG, WebP, GIF, BMP, SVG — converted on your device

Converting re-encodes the picture, it does not recover detail. A JPEG saved as PNG keeps its existing compression artefacts and only grows the file — going from a lossy format to a lossless one never undoes the loss.

Private by default

This tool runs entirely in your browser. Your data is never uploaded to a server.

How it works

What a conversion actually does

The source is decoded to raw pixels, drawn onto a canvas, and re-encoded in the target format. Because it goes through raw pixels, nothing of the original encoding survives — which is what makes conversion safe in one direction and pointless in the other.

Lossy to lossless (JPEG to PNG) preserves the artefacts and grows the file. Lossless to lossy (PNG to JPEG) discards detail permanently.
Re-encoding a JPEG as a JPEG loses a little more each time, so repeated round trips visibly degrade it.
Transparency is detected by sampling the decoded pixels, so a PNG that merely supports alpha but does not use it converts cleanly.
EXIF and colour profiles are not carried over: the output is written from the decoded pixels alone.

For reference

Choosing between the three

Format	Compression	Transparency	Best for
PNG	Lossless	Yes	Screenshots, logos, sharp edges
JPEG	Lossy	No	Photographs, maximum compatibility
WebP	Both	Yes	The web, when IE support is not needed
GIF	Lossless, 256 colors	1-bit only	Legacy animation
AVIF	Both	Yes	Smallest files — but browsers cannot encode it

WebP has been supported by every current browser since 2020. AVIF is smaller still, but producing it needs a build tool rather than a browser.

How to use

4 clear steps.

Drop in the image you want to convert.
Choose the output format.
Set the quality for JPEG or WebP.
Download the converted file.

Good to know

Frequently asked questions

Which format should I choose?: WebP for the web: it handles photographs and transparency, and is 25–35% smaller than the equivalent JPEG or PNG. JPEG for photographs where compatibility matters most. PNG for screenshots, logos, and anything with sharp edges or transparency.
Does converting a JPEG to PNG improve it?: No. PNG stores exactly the pixels it is given, including every compression artefact the JPEG already has. The file gets larger and the picture stays the same — going from lossy to lossless never undoes the loss.
What happens to transparency in a JPEG?: JPEG has no alpha channel, so transparent areas must be filled with a solid colour. The tool detects transparency, warns you, and lets you choose that colour rather than defaulting to black.
Can it convert to AVIF?: No. Browsers can display AVIF but cannot reliably encode it from a canvas, so offering it would produce a file that is secretly a PNG. Only formats the browser can genuinely write are listed.