FREE IMAGE TOOL · NO UPLOAD
Image converter & compressor
Convert between PNG, JPEG and WebP with a quality slider, watch the size change, and download instantly. It runs in this browser — no upload, no account, no watermark.
PNG, JPG or WebP. Processed in your browser; nothing is uploaded. Or drag a file onto this box.
How to convert an image format
- Choose a PNG, JPG or WebP from your device.
- Pick the output format and, for JPEG or WebP, a quality level.
- Press Convert & download — the file saves immediately and the size readout shows the change.
- Need a different quality? Move the slider and convert again; nothing is locked in.
PNG, JPEG or WebP?
| PNG | JPEG | WebP | |
|---|---|---|---|
| Compression | Lossless | Lossy | Lossy or lossless |
| Transparency | Yes | No (flattens to white) | Yes |
| Best for | Graphics, cutouts, screenshots | Photos where size matters less | Almost everything on the web |
Turning photos into something a marketplace or a CMS will accept is the most common job: many platforms demand JPEG or cap file sizes, and that is exactly what the quality slider is for.
Converter questions
Which formats can I convert between?
PNG, JPEG and WebP, in any direction. The download starts automatically when the conversion finishes, and the size readout tells you exactly what you saved or spent versus the original file.
Is my image uploaded to a server?
No. The image is decoded and re-encoded inside this browser tab with canvas APIs, so the file never leaves your device. There is no account, no credit and no limit beyond what your browser can hold in memory.
Which format should I choose for the web?
WebP, most of the time. It stores both photographs and graphics far smaller than JPEG or PNG at a visually equivalent quality, and every current browser renders it. PNG remains the right pick when you need maximum compatibility or lossless quality with transparency, and JPEG only when an older system demands it.
What does the quality slider actually change?
It sets the encoder quality for JPEG and WebP, which trades file size against compression artifacts. Around 80–90% is usually indistinguishable from the source for photos; going below ~60% starts to show blur and banding. PNG ignores the slider because it is lossless — with PNG the way to shrink a file is fewer pixels, not lower quality.
What happens to transparency in a JPEG?
JPEG has no alpha channel, so transparent areas are flattened onto white before encoding, and that is stated in the tool before you convert. PNG and WebP both keep per-pixel transparency, so a cutout from our background remover can be re-encoded as WebP without losing it.
Can converting make my image look better?
No. Conversion changes how pixels are stored, not what they contain. Re-encoding a compressed JPEG as PNG makes a bigger file with the same visual quality — artifacts already in the source stay in the output. The one honest use of re-encoding is shrinking: same pixels, smaller file.